Scientific Earth Drilling Information Service - SEDIS

Search SEDIS

Data sets

Publications

Expeditions

Thesaurus

Search in thesaurus:

show categories

D

D-J Basin
USE	Denver Basin

D-region
SN	As of 1993, no longer a valid term for GeoRef. Usually out-of-scope. Used with ionosphere.

D/H
BT	isotopes
	.stable isotopes
	..D/H
BT	hydrogen
	.D/H
RT	isotope ratios
	tracers
	deuterium
SN	This term has multiple hierarchies.

Da

Da Hinggan Ling
BT	Asia
	.Far East
	..China
	...Da Hinggan Ling
UF	Daxinganling
	Great Khingan Range
	Greater Khingan Mountains
	Khingan Range
RT	Inner Mongolia China
	Heilongjiang China
SN	Mountainous system in N Inner Mongolia extending into NW Heilongjiang Province. Before 1993, also search Khingan; Da Hingan Ling. Indexed with provinces as applicable. Added to Thesaurus in 1993.

Da Lat
USE	Dalat Vietnam

Da-ching Field
USE	Daqing Field

Dabie Mountains
BT	Asia
	.Far East
	..China
	...Dabie Mountains
RT	Anhui China
	Henan China
	Hubei China
SN	South-central China, W Hubei, SE Anhui, SW Henan. Before 1993, also search Dabieshan and Dabie Shan. Added to Thesaurus in 1993.

dac

Dachang Deposit
BT	Asia
	.Far East
	..China
	...Guangxi China
	....Dachang Deposit
RT	polymetallic ores
	gold ores
	antimony ores
	tin ores
SN	Nandan County, NW Guangxi. Added to Thesaurus in 1993.

Dacht-e-Nawar
USE	Dasht-i-Nawar

Dacian
BT	Chronostratigraphic Units
	.Phanerozoic
	..Cenozoic
	...Neogene
	....Pliocene
	.....Dacian
SN	Europe.

Dacian Basin
BT	Europe
	.Southern Europe
	..Romania
	...Dacian Basin
SN	Region roughly covering modern Romania.

dacite porphyry
BT	igneous rocks
	.volcanic rocks
	..dacites
	...dacite porphyry
RT	porphyry

dacites
BT	igneous rocks
	.volcanic rocks
	..dacites
NT	dacite porphyry
RT	dacitic composition
	metadacite

dacitic composition
RT	composition
	dacites
	igneous rocks
SN	Before 1982, also search dacitic. Added to Thesaurus in 1982.

Dacryoconarida
BT	problematic fossils
	.Dacryoconarida
RT	Mollusca
SN	Order.

Dactylioceratidae
BT	Invertebrata
	.Mollusca
	..Cephalopoda
	...Tetrabranchiata
	....Ammonoidea
	.....Dactylioceratidae

Dade County Florida
BT	United States
	.Florida
	..Dade County Florida
NT	Biscayne Bay
	Miami Florida
RT	Florida Keys
	Biscayne Aquifer
SN	S Florida.

Dade County Georgia
BT	United States
	.Georgia
	..Dade County Georgia
SN	Extreme NW Georgia.

Dade County Missouri
BT	United States
	.Missouri
	..Dade County Missouri
SN	SW Missouri.

Dadoxylon
BT	Plantae
	.Spermatophyta
	..Gymnospermae
	...Dadoxylon
RT	Coniferales
	Cordaitales
	Ginkgoales
	Glossopteris
SN	Genus.

Dagestan Russian Federation
BT	Commonwealth of Independent States
	.Russian Federation
	..Dagestan Russian Federation
BT	Europe
	.Dagestan Russian Federation
NT	Makhachkala Russian Federation
UF	Daghestan Russian Federation
RT	Northern Caucasus
SN	Former Autonomous Soviet Socialist Republic on W shore of Caspian Sea. Before 1993, Dagestan Russian Republic was also used. This term has multiple hierarchies.

Daggett County Utah
BT	United States
	.Utah
	..Daggett County Utah
SN	NE Utah.

Daghestan Russian Federation
USE	Dagestan Russian Federation

dahllite
BT	carbonates
	.dahllite
BT	phosphates
	.dahllite
RT	carbonate apatite
SN	This term has multiple hierarchies.

Dahomey
USE	Benin

Daiichi-Kashima Seamount
USE	Kashima Seamount

Daiiti-Kashima Seamount
USE	Kashima Seamount

daily variation
USE	diurnal variations

Daito Ridge
BT	Pacific Ocean
	.North Pacific
	..Northwest Pacific
	...Philippine Sea
	....Daito Ridge
RT	DSDP Site 445
SN	NW Philippine Sea. This term has multiple hierarchies. Added to Thesaurus in 1981.

Dakar Senegal
BT	Africa
	.West Africa
	..Senegal
	...Dakar Senegal
SN	City on the Atlantic Ocean.

Dakhla Oasis
BT	Africa
	.North Africa
	..Egypt
	...Dakhla Oasis
RT	Western Desert
SN	Oasis in Western Desert of central Egypt. Added to Thesaurus in 1989.

Dakhla Shale
RT	Egypt
	lower Tertiary
	Upper Cretaceous
SN	Upper Cretaceous to lower Tertiary. Indexed with ages as applicable. Added to Thesaurus in 1989.

Dakota Aquifer
BT	North America
	.Dakota Aquifer
RT	United States
	Western Interior
SN	Covers a large area in the Western Interior from Kansas to parts of Canada.

Dakota County Minnesota
BT	United States
	.Minnesota
	..Dakota County Minnesota

Dakota County Nebraska
BT	United States
	.Nebraska
	..Dakota County Nebraska

Dakota Formation
BT	Chronostratigraphic Units
	.Phanerozoic
	..Mesozoic
	...Cretaceous
	....Dakota Formation
RT	New Mexico
	Wyoming
	Montana
	Oklahoma
	Colorado
	Nebraska
	North Dakota
	Minnesota
	Kansas
	South Dakota
	Moxa Arch
	Mesa Rica Sandstone
SN	E Colorado, NE New Mexico, North Dakota, Kansas, Minnesota, SE Montana, Nebraska, South Dakota, W Oklahoma, E Wyoming.

Dalarna
BT	Europe
	.Western Europe
	..Scandinavia
	...Sweden
	....Dalarna
UF	Dalarne
	Dalecarlia
SN	Region in W central Sweden.

Dalarne
USE	Dalarna

Dalat Vietnam
BT	Asia
	.Far East
	..Vietnam
	...Dalat Vietnam
UF	Da Lat
SN	Town NE of Saigon (Ho Chi Minh City), S Vietnam.

Dale County Alabama
BT	United States
	.Alabama
	..Dale County Alabama

Dalecarlia
USE	Dalarna

Dalgaranga
BT	Australasia
	.Australia
	..Western Australia
	...Dalgaranga
RT	impact features
	mesosiderite
SN	Region. West-central Western Australia. Also mesosiderite meteorite and meteor crater. As of 1993, use Dalgaranga Australia for the town. Use Dalgaranga Meteorite for the meteorite.

dalgo County Texas
NT	McAllen Ranch Field

dalgo Mexico
NT	Pachuca Mexico

Dalhart Basin
BT	United States
	.Texas
	..Dalhart Basin
SN	Texas Panhandle. Added to Thesaurus in 1985.

Dallam County Texas
BT	United States
	.Texas
	..Dallam County Texas

Dallas County Alabama
BT	United States
	.Alabama
	..Dallas County Alabama
SN	S central Alabama.

Dallas County Arkansas
BT	United States
	.Arkansas
	..Dallas County Arkansas
SN	S central Arkansas.

Dallas County Iowa
BT	United States
	.Iowa
	..Dallas County Iowa
SN	Central Iowa.

Dallas County Missouri
BT	United States
	.Missouri
	..Dallas County Missouri
SN	SW central Missouri.

Dallas County Texas
BT	United States
	.Texas
	..Dallas County Texas
NT	Dallas Texas
SN	N Texas.

Dallas Texas
BT	United States
	.Texas
	..Dallas County Texas
	...Dallas Texas
SN	City in NE central Texas.

Dalmatia
BT	Europe
	.Southern Europe
	..Dalmatia
RT	Croatia
	Montenegro
	Yugoslavia
	Adriatic Sea
	Mediterranean region
	Bosnia-Herzegovina
	Karst region
	Split Croatia
SN	Region, including many islands, which extends along the Adriatic Sea from Zadar on the N to near the Albanian border on the S. Sometimes the name is applied to most of the Croatian coast. Also index republics or regions as applicable.

Dalradian
UF	Dalradian Supergroup
RT	Precambrian
	Cambrian
	Silurian
	Devonian
	Scotland
	Ballachulish Complex
	Ireland
SN	Ireland and Scotland. Indexed with ages as applicable.

Dalradian Supergroup
USE	Dalradian

Dalslandian Orogeny
USE	Sveconorwegian Orogeny

dam sites
USE	dams

damage
RT	catastrophes
	corrosion
	destruction
	earthquakes
	effects
	engineering geology
	fires
	formation damage
	geochemistry
	geologic hazards
	landslides
SN	Used for damage resulting from natural phenomena. Also see degradation. Added to Thesaurus in 1981.

damage, radiation
USE	radiation damage

Damara Orogeny
RT	lower Paleozoic
	Namibia
	Neoproterozoic
	orogeny
	South Africa
	Southern Africa
	tectonics
SN	Neoproterozoic to lower Paleozoic. Southern Africa. Indexed with age or ages as applicable. Added to Thesaurus in 1993.

Damara System
BT	Chronostratigraphic Units
	.Precambrian
	..Proterozoic
	...Damara System
RT	Namibia
SN	Includes Khomas Series, Marble Series, and Quartzite Series, Chuos Tillite, and Otavi Series. In W Damaraland region. NW of Walvis Bay.

Damascus Syria
BT	Asia
	.Middle East
	..Syria
	...Damascus Syria
SN	City in SW Syria.

Damkohler number
USE	Reynolds number

Damodar Valley
BT	Asia
	.Indian Peninsula
	..India
	...Damodar Valley
RT	Bihar India
	West Bengal India
SN	River valley. Indexed with states as applicable.

Dampier Ridge
BT	Pacific Ocean
	.South Pacific
	..Southwest Pacific
	...Tasman Sea
	....Dampier Ridge
SN	NE of Sidney in N Tasman Sea. This term has multiple hierarchies.

damping
USE	attenuation

dams
NT	arch dams
	concrete dams
	gravity dams
	natural dams
	rockfill dams
	tailings dams
UF	dam sites
	damsites
RT	land subsidence
	abutments
	embankments
	slope stability
	seismic response
	engineering geology
	rock mechanics
	reservoirs
	design
	construction
	foundations
	riprap
	geomembranes
	geotextiles
	ground-water dams
	grouting
	reinforced materials
	site exploration
	soil mech

damsites
USE	dams

Damuda Series
BT	Chronostratigraphic Units
	.Phanerozoic
	..Paleozoic
	...Permian
	....Damuda Series
RT	India
	Bihar India
	Madhya Pradesh India
	Barakar Stage
	Karharbari Stage
	Raniganj Formation
SN	Forms middle part of lower Gondwanas. Subdivided into three stages: Raniganj (series), Ironstone shales, and lower Damudas, afterwards called Barakars.

Dan River basin
BT	United States
	.Dan River basin
RT	Virginia
	North Carolina
SN	Indexed with states as applicable.

Danakil
USE	Afar

Danakil Depression

danburite
BT	silicates
	.framework silicates
	..danburite

Dane County Wisconsin
BT	United States
	.Wisconsin
	..Dane County Wisconsin
NT	Lake Mendota
	Madison Wisconsin
SN	S Wisconsin.

Dangerous Islands
USE	Tuamotu Islands

Danian
BT	Chronostratigraphic Units
	.Phanerozoic
	..Cenozoic
	...Paleogene
	....Paleocene
	.....Danian
BT	Chronostratigraphic Units
	.Phanerozoic
	..Cenozoic
	...Paleogene
	....Paleocene
	.....lower Paleocene
	......Danian
NT	Niniyur Group
RT	Roca Formation
	Ekofisk Formation
SN	Europe. Above Maestrichtian (Cretaceous), below Montian.

Daniel's Harbour Newfoundland
BT	Canada
	.Eastern Canada
	..Newfoundland
	...Newfoundland Island
	....Daniel's Harbour Newfoundland
SN	Village on upper Gulf of Saint Lawrence in NW Newfoundland.

Daniels County Montana
BT	United States
	.Montana
	..Daniels County Montana

Dankalia
USE	Afar

Danube Delta
BT	Europe
	.Danube Delta
UF	Danube River delta
RT	Romania
	Ukraine
SN	On the Black Sea primarily in Romania. Indexed with Romania and/or Ukraine as applicable.

Danube Plain
BT	Europe
	.Southern Europe
	..Danube Plain
RT	Romania
	Bulgaria
	Walachia
SN	Covers the Walachian Plain and the N Bulgaria lowlands. Also search Danube. Indexed with countries as applicable.

Danube River
BT	Europe
	.Danube River
UF	Donau River
	Duna River
	Dunai River
	Dunarea River
	Dunau River
RT	Yugoslavia
	Serbia
	Austria
	Germany
	Romania
	Ukraine
	Bulgaria
	Hungary
	Slovakia
	Kostolac
SN	Flows E from the Black Forest and turns S just N of Budapest. It then flows S, SE, N, and finally E into the Black Sea. Also search Danube. Indexed with countries as applicable.

Danube River delta
USE	Danube Delta

Danube Stade
BT	Chronostratigraphic Units
	.Phanerozoic
	..Cenozoic
	...Quarternary
	....Pleistocene
	.....Lower Pleistocene
	......Danube Stade
UF	Danube Stage
SN	Added to Thesaurus in 1982.

Danube Stage
USE	Danube Stade

Danube Valley
BT	Europe
	.Danube Valley
RT	Yugoslavia
	Serbia
	Austria
	Germany
	Romania
	Ukraine
	Bulgaria
	Hungary
	Slovakia
	Kostolac
SN	River valley. Also search Danube. Indexed with countries as applicable.

Danville Virginia
BT	United States
	.Virginia
	..Danville Virginia
RT	Pittsylvania County Virginia
SN	City on the North Carolina border in S Virginia. Indexed with Pittsylvania County Virginia for adjacent areas if applicable.

Danzig Poland
USE	Gdansk Poland

Daonella
BT	Invertebrata
	.Mollusca
	..Bivalvia
	...Pteriina
	....Pectinacea
	.....Daonella

Daqing Field
BT	ilongjiang China
	.Daqing Field
UF	Da-ching Field
RT	oil and gas fields
SN	Oil field, Heilongjiang, NE China. Added to Thesaurus in 1985.

Darasun Russian Federation
BT	Commonwealth of Independent States
	.Russian Federation
	..Chita Russian Federation
	...Darasun Russian Federation
SN	Town in S central Chita Oblast, N of Mongolia. Before 1993, Darasun Russian Republic was also used. This term has multiple hierarchies.

Darcy's law
RT	aquifers
	fluid phase
	gases
	Green-Ampt model
	ground water
	hydraulic head
	hydrodynamics
	permeability
	petroleum
	porosity
	reservoir properties

Dare County North Carolina
BT	United States
	.North Carolina
	..Dare County North Carolina
NT	Cape Hatteras
	Duck North Carolina
SN	NE North Carolina.

Darfur
BT	Africa
	.East Africa
	..Sudan
	...Darfur
UF	Darfur Sudan
SN	Region in W Sudan. A large former province.

Darfur Sudan
USE	Darfur

Darien
BT	Central America
	.Panama
	..Darien
SN	E part of isthmus between Gulf of Darien on E and Gulf of San Miguel on W.

Darjeeling India
BT	Asia
	.Indian Peninsula
	..India
	...West Bengal India
	....Darjeeling India
UF	Darjiling India
SN	Town, hill station, and district near Sikkim border in extreme N West Bengal, E India.

Darjiling India
USE	Darjeeling India

Darke County Ohio
BT	United States
	.Ohio
	..Darke County Ohio

Darling Downs
BT	Australasia
	.Australia
	..Queensland Australia
	...Darling Downs
SN	Tableland in SE Queensland.

Darling Range
BT	Australasia
	.Australia
	..Western Australia
	...Darling Range
SN	In SW Western Australia.

Darlington County South Carolina
BT	United States
	.South Carolina
	..Darlington County South Carolina

Darmstadt Germany
BT	sse Germany
	.Darmstadt Germany
SN	City in S Hesse.

Darriwilian
BT	Chronostratigraphic Units
	.Phanerozoic
	..Paleozoic
	...Ordovician
	....Middle Ordovician
	.....Darriwilian

Dartmoor
BT	Europe
	.Western Europe
	..United Kingdom
	...Great Britain
	....England
	.....Devonshire England
	......Dartmoor
SN	Tableland in Devonshire, SW England.

Darvaz
BT	Asia
	.Tajikistan
	..Darvaz
BT	Asia
	.Central Asia
	..Pamirs
	...Darvaz
UF	Kaganovich Peak
SN	Peak in the W Pamirs in central Tajikistan. This term has multiple hierarchies.

Darvaza Range
BT	Asia
	.Tajikistan
	..Darvaza Range
RT	Pamirs
	Alai Range
SN	Branch of Alai Range N of Afghanistan in S central Tajikistan. This term has multiple hierarchies. Indexed with mountains as applicable.

Darvaza Turkmenia
BT	Asia
	.Turkmenia
	..Ashkhabad Turkmenia
	...Darvaza Turkmenia
SN	Town in Ashkhabad Oblast in S Turkmenia. This term has multiple hierarchies.

Darvel Bay
BT	Asia
	.Far East
	..Malaysia
	...East Malaysia
	....Sabah Malaysia
	.....Darvel Bay
RT	Celebes Sea
SN	Inlet of Celebes Sea in Sabah in East Malaysia. This term has multiple hierarchies.

Darwin glass
BT	tektites
	.Darwin glass
UF	queenstownite
RT	glasses
	impactite

Darwin, Charles
UF	Charles Darwin
RT	biography
	Darwinism
SN	Added to Thesaurus in 1985.

Darwinism
RT	biologic evolution
	Darwin, Charles
	life origin
	natural selection
	paleoecology
	paleontology
SN	Theory on origin of species; evolution is the result of variation and survival of the fittest by natural selection. Added to Thesaurus in 1989.

Darwinula
BT	Invertebrata
	.Arthropoda
	..Mandibulata
	...Crustacea
	....Ostracoda
	.....Podocopida
	......Darwinula
RT	microfossils
SN	Indexed with microfossils if applicable.

Dashkesan Azerbaijan
BT	Europe
	.Azerbaijan
	..Dashkesan Azerbaijan
SN	City in W Azerbaijan. This term has multiple hierarchies.

Dasht-e Bayaz
USE	Dasht-e-Bayaz

Dasht-e-Bayaz
BT	Asia
	.Middle East
	..Iran
	...Dasht-e-Bayaz
UF	Dasht-e Bayaz
RT	earthquakes
SN	Region in NE part of country. Locale of earthquake in 1968.

Dasht-e-Lut Basin
USE	Lut Desert

Dasht-e-Nawar
USE	Dasht-i-Nawar

Dasht-i-Lut
USE	Lut Desert

Dasht-i-Nawar
BT	Asia
	.Indian Peninsula
	..Afghanistan
	...Dasht-i-Nawar
UF	Dacht-e-Nawar
	Dasht-e-Nawar
SN	Volcanic region in central Afghanistan.

Dastakert Armenia
BT	Europe
	.Armenia
	..Dastakert Armenia
SN	Village in S Armenia. This term has multiple hierarchies.

Dasycladaceae
BT	Plantae
	.algae
	..Chlorophyta
	...Chlorophyceae
	....Dasycladaceae
RT	microfossils
SN	Indexed with microfossils if applicable.

data
RT	data acquisition
	data bases
	data processing
	data retrieval
	DTA data
	electron microscopy data
	electron probe data
	ion probe data
	mineral data
	neutron activation analysis data
	neutron diffraction data
	neutron probe data
	new data
	SEM data
	SHRIMP data
	spatial
SN	Used as a general term. Before 1975 also search analytical data.

data acquisition
UF	acquisition, data
RT	data processing
	data storage
	data

data bases
UF	data systems
	databases
RT	data processing
	geographic information systems
	information systems
	GeoRef
	Geoscan
	CD-ROM
	data retrieval
	data storage
	Pascal
	information management
	CRIB
	data
	data handling
	data management
	digital data
	National Coal Resources Data System
	NAWDEX
	NWIS-II
	regi
SN	Also index spatial data and/or digital data if applicable.

data ha

data handling
UF	handling, data
RT	data processing
	information systems
	data bases
	data retrieval
	spreadsheets
	parallel processing
	data management
	digital data
	digitization
	Internet
	World Wide Web

data management
BT	information management
	.data management
RT	data processing
	data bases
	data handling
	digital data
	spatial data
SN	Also search data processing AND management if applicable. Added to Thesaurus in 1998.

data processing
NT	parallel processing
UF	automatic data processing
	computer methods
	computer processing
	electronic data processing
RT	algorithms
	computer programs
	analog simulation
	automated analysis
	Bayesian analysis
	ARC/INFO
	computer networks
	artificial intelligence
	BASIC
	computer languages
	CAD
	CD-ROM
	data bases
	cokriging
	computer animation
	computers
	CRIB
	data
	data acquisition
	data ha
SN	Replaces automatic data processing. Used for computer applications and machine modelling of geological data.

data retrieval
UF	retrieval, data
RT	data processing
	information systems
	computer networks
	CD-ROM
	data bases
	data storage
	parallel processing
	data
	data handling
	digital data
	Internet
	World Wide Web

data storage
RT	CD-ROM
	data acquisition
	data bases
	data processing
	data retrieval
	information systems
	parallel processing
	spreadsheets
	storage

data systems
USE	data bases

databases
USE	data bases

Date Creek basin
BT	United States
	.Arizona
	..Date Creek basin
RT	La Paz County Arizona
	Yuma County Arizona
	Yavapai County Arizona
SN	W central Arizona. Indexed with counties as applicable. Added to Thesaurus in 1985.

dates
RT	absolute age
	geochronology
SN	Used only to indicate specific absolute age dates.

Datil-Mogollon volcanic field
BT	United States
	.New Mexico
	..Datil-Mogollon volcanic field
UF	Mogollon-Datil volcanic field
RT	Mogollon Mountains
SN	SW New Mexico. Added to Thesaurus in 1981.

dating, fission-track
USE	fission-track dating

dating, particle-track
USE	particle-track dating

datolite
BT	silicates
	.orthosilicates
	..nesosilicates
	...datolite

Dauphin County Pennsylvania
BT	United States
	.Pennsylvania
	..Dauphin County Pennsylvania
NT	Harrisburg Pennsylvania
SN	S central Pennsylvania.

Dauphine
BT	Europe
	.Western Europe
	..France
	...Dauphine
RT	Bas-Dauphine
	Devoluy
SN	Historical region and former province in SE France.

Dauphine Alps
BT	Europe
	.Western Europe
	..France
	...Dauphine Alps
BT	Europe
	.Alps
	..Western Alps
	...Dauphine Alps
NT	Belledonne Massif
	Pelvoux Massif
	Vercors
RT	Bas-Dauphine
	Cottian Alps
	Devoluy
SN	W offshoot of Cottian Alps in SE France. This term has multiple hierarchies.

Davenport Iowa
BT	United States
	.Iowa
	..Scott County Iowa
	...Davenport Iowa
SN	City on the Mississippi River in E Iowa.

Davidson County North Carolina
BT	United States
	.North Carolina
	..Davidson County North Carolina
SN	Central North Carolina.

Davidson County Tennessee
BT	United States
	.Tennessee
	..Davidson County Tennessee
NT	Nashville Tennessee
SN	N central Tennessee.

Davidson North Carolina
BT	United States
	.North Carolina
	..Mecklenburg County North Carolina
	...Davidson North Carolina
SN	Town on the South Carolina border in S North Carolina.

Davidsville Gr

Davidsville Group
BT	Chronostratigraphic Units
	.Phanerozoic
	..Paleozoic
	...Ordovician
	....Davidsville Group
RT	Canada
	Newfoundland Island
SN	In NE Newfoundland.

Davie County North Carolina
BT	United States
	.North Carolina
	..Davie County North Carolina

Daviess County Indiana
BT	Indiana
	.Daviess County Indiana

Daviess County Kentucky
BT	United States
	.Kentucky
	..Daviess County Kentucky

Daviess County Missouri
BT	United States
	.Missouri
	..Daviess County Missouri

Davis County Iowa
BT	United States
	.Iowa
	..Davis County Iowa
SN	SE Iowa.

Davis County Utah
BT	United States
	.Utah
	..Davis County Utah
RT	Great Salt Lake
	Jordan River
	Jordan Valley
SN	N Utah.

Davis Formation
RT	Arkansas
	Indiana
	Iowa
	Kansas
	Louisiana
	Missouri
	Oklahoma
	Upper Cambrian
	Upper Jurassic
SN	Upper Cambrian of Arkansas, Indiana, Iowa, Kansas, Missouri, Oklahoma. May also occur as Upper Jurassic in Louisiana or Oklahoma. Search in combination with age or area. Indexed with age as applicable. Added to Thesaurus in 1995.

Davis Mountains
BT	United States
	.Texas
	..Davis Mountains
RT	Brewster County Texas
	Jeff Davis County Texas
	Reeves County Texas
	West Texas
SN	Centered in Jeff Davis County in W Texas. Indexed with counties as applicable.

Davis Strait
RT	Arctic Ocean
	Atlantic Ocean
	Baffin Bay
	Disko Island
	Godthaabsfjord
	Kangerdlugssuaq
	Labrador Current
	Narpaing Fjord
	North Atlantic
	Sondre Strom Fjord
SN	Between SW Greenland and Baffin Island. Indexed with Arctic Ocean and/or North Atlantic as applicable.

Davison County South Dakota
BT	United States
	.South Dakota
	..Davison County South Dakota

Davos Switzerland
BT	Europe
	.Central Europe
	..Switzerland
	...Graubunden Switzerland
	....Davos Switzerland
SN	Town consisting of Davos Platz and Davos Dorf in N central Graubunden.

Dawes County Nebraska
BT	United States
	.Nebraska
	..Dawes County Nebraska

Dawson County Georgia
BT	United States
	.Georgia
	..Dawson County Georgia
SN	N Georgia.

Dawson County Montana
BT	United States
	.Montana
	..Dawson County Montana

Dawson County Nebraska
BT	United States
	.Nebraska
	..Dawson County Nebraska
SN	S central Nebraska.

Dawson County Texas
BT	United States
	.Texas
	..Dawson County Texas
SN	NW Texas.

Dawson Yukon Territory
BT	Canada
	.Western Canada
	..Yukon Territory
	...Dawson Yukon Territory
SN	City in W central Yukon Territory.

dawsonite
BT	carbonates
	.dawsonite

Daxinganling
USE	Da Hinggan Ling

Day County South Dakota
BT	United States
	.South Dakota
	..Day County South Dakota

DCB method (soils)
USE	citrate-bicarbonate-dithionite method

DDT
BT	pesticides
	.DDT
BT	organic compounds
	.halogenated hydrocarbons
	..chlorinated hydrocarbons
	...DDT
UF	chlorophenothane
	dichloro-diphenyl-trichloro-ethane
	dicophane
	methoxychlor
RT	environmental geology
	agrochemicals
	waste disposal
	ethane
	trichloroethane
SN	Abbreviation used for the pesticide 1, 1, 1-trichloro-2, 2-bis(p-chlorophenyl) ethane and related compounds. This term has multiple hierarchies. Added to Thesaurus in 1989.

De Baca County New Mexico
BT	United States
	.New Mexico
	..De Baca County New Mexico
SN	E New Mexico.

De Kalb County Alabama
BT	United States
	.Alabama
	..De Kalb County Alabama
SN	NE Alabama.

De Kalb County Georgia
BT	United States
	.Georgia
	..De Kalb County Georgia
RT	Stone Mountain
SN	NW central Georgia.

De Kalb County Illinois
BT	United States
	.Illinois
	..De Kalb County Illinois
SN	N Illinois.

De Kalb County Indiana
BT	Indiana
	.De Kalb County Indiana
SN	NE Indiana.

De Kalb County Missouri
BT	United States
	.Missouri
	..De Kalb County Missouri
SN	NW Missouri.

De Kalb County Tennessee
BT	United States
	.Tennessee
	..De Kalb County Tennessee
SN	Central Tennessee.

De Long Mountains
BT	United States
	.Alaska
	..Northern Alaska
	...Brooks Range
	....De Long Mountains
UF	DeLong Mountains
SN	NW Alaska. W part of the Brooks Range. Added to Thesaurus in 1985.

De Soto County Florida
BT	United States
	.Florida
	..De Soto County Florida
SN	S central Florida.

De Soto County Mississippi
BT	United States
	.Mississippi
	..De Soto County Mississippi
SN	Extreme NW Mississippi.

De Soto Parish Louisiana
BT	United States
	.Louisiana
	..De Soto Parish Louisiana

De Twente
USE	Twente

De Witt County Illinois
BT	United States
	.Illinois
	..De Witt County Illinois

De Witt County Texas
BT	United States
	.Texas
	..De Witt County Texas

de#greenschist facies#high pressure#high temperature#igneous rocks#intrusions#is

Dead Sea
BT	Asia
	.Middle East
	..Dead Sea
RT	Israel
	Jordan
	Dead Sea Rift
	Great Rift Valley
SN	A salt lake lying in part of the Great Rift Valley and constituting the lowest point on the Earth's surface. Also search Dead Sea Rift. Indexed with countries as applicable.

Dead Sea Rift
BT	Asia
	.Middle East
	..Dead Sea Rift
RT	Red Sea Rift
	Israel
	Jordan
	Dead Sea
	Great Rift Valley

Deadwood Formation
BT	Chronostratigraphic Units
	.Phanerozoic
	..Paleozoic
	...Deadwood Formation
RT	Lower Ordovician
	Wyoming
	Montana
	Upper Cambrian
	South Dakota
SN	Upper Cambrian and Lower Ordovician. In N Black Hills, conformably underlies Aladdin Sandstone. SE Montana, W South Dakota (Black Hills), and E Wyoming. Indexed with ages as applicable.

Deaf Smith County Texas
BT	United States
	.Texas
	..Deaf Smith County Texas
SN	Extreme N Texas.

Dearborn County Indiana
BT	Indiana
	.Dearborn County Indiana

death assemblages
USE	thanatocenoses

Death Valley
BT	United States
	.California
	..Death Valley
RT	Nevada
	San Bernardino County California
	national monuments
	Nye County Nevada
	Inyo County California
	Death Valley Fault
	Esmeralda County Nevada
	Furnace Creek
SN	Valley in San Bernardino and Inyo counties, California. If applicable, also index/search Death Valley National Monument which includes a larger area extending into Nevada. Indexed with counties as applicable.

Death Valley Fault
BT	United States
	.California
	..Death Valley Fault
RT	Death Valley
SN	S California. Indexed with counties as applicable. Added to Thesaurus in 1989.

Debrecen Hungary
BT	ngary
	.Debrecen Hungary
SN	City in E Hungary.

debris
RT	debris avalanches
	debris cones
	debris flows
	detritus
	geomorphology
	Heinrich events
	regolith

debris avalanches
BT	mass movements
	.debris avalanches
RT	slope stability
	avalanches
	geomorphology
	debris
	debris flows
SN	Added to Thesaurus in 1989.

debris cones
RT	ablation
	alluvial fans
	cones
	debris
	debris flows
	fluvial features
	geomorphology
	glacial features
	glacial geology
	glaciers
	landslides
SN	Added to Thesaurus in 1982.

debris flows
BT	mass movements
	.debris flows
RT	debris cones
	slope stability
	geomorphology
	flows
	debris avalanches
	debris

debris slopes
USE	talus slopes

Decade of North American Geology
USE	DNAG

Decapoda
USE	Malacostraca

decarbonation
RT	carbon dioxide
	carbonates
	chemical reactions
	processes
SN	Removal of carbon dioxide or carbonic acid.

Decatur County Georgia
BT	United States
	.Georgia
	..Decatur County Georgia
SN	SW Georgia.

Decatur County Indiana
BT	Indiana
	.Decatur County Indiana
SN	SE central Indiana.

Decatur County Iowa
BT	United States
	.Iowa
	..Decatur County Iowa
SN	S Iowa.

Decatur County Kansas
BT	United States
	.Kansas
	..Decatur County Kansas
RT	Leoville Meteorite
SN	NW Kansas.

Decatur County Tennessee
BT	United States
	.Tennessee
	..Decatur County Tennessee
SN	W Tennessee.

Decaturville Missouri
BT	United States
	.Missouri
	..Camden County Missouri
	...Decaturville Missouri
RT	impact features
SN	Village in central Missouri.

decay, radioactive
USE	radioactive decay

Decazeville France
BT	Europe
	.Western Europe
	..France
	...Aveyron France
	....Decazeville France
SN	Town in S central France.

Deccan Intertrappean
USE	Intertrappean Beds

Deccan Intertrappean Beds
USE	Intertrappean Beds

Deccan Intertrappean Series
USE	Intertrappean Beds

Deccan Plateau
BT	Asia
	.Indian Peninsula
	..India
	...Deccan Plateau
UF	Dekkan Plateau
RT	Andhra Pradesh India
	Karnataka India
	Madhya Pradesh India
	Orissa India
	Maharashtra India
	Indian Shield
	Lonar Crater
SN	Triangular tableland between the Eastern and Western Ghats and between the Narmada River on the N and the Krishna River on the S. Also search Deccan. Indexed with states as applicable.

Deccan Traps
RT	India
	Intertrappean Beds
	K-T boundary
	lower Eocene
	Upper Cretaceous
SN	Upper Cretaceous to lower Eocene. Named after the step-like aspect of the flat topped hills of the Deccan Plateau. Indexed with ages as applicable.

Deception Island
BT	Antarctica
	.South Shetland Islands
	..Deception Island
SN	One of Britain's South Shetland Islands off N Antarctic Peninsula. This term has multiple hierarchies.

Dechenellidae
BT	Invertebrata
	.Arthropoda
	..Trilobitomorpha
	...Trilobita
	....Ptychopariida
	.....Dechenellidae

dechlorination
RT	biodegradation
	bioremediation
	chlorinated hydrocarbons
	chlorine
	decontamination
	geochemistry
	hydrochemistry
	metabolites
	pollution
	purification
	water treatment
SN	May be used in detoxification usually with H>+` or OH>-` ions.

decision-making
RT	land management
	legislation
	policy
	public policy
	regulations
	risk assessment
SN	Added to Thesaurus in 1981.

declination
SN	As of 1981, no longer a valid term for GeoRef. Use magnetic declination.

decollement
UF	detachment
RT	tectonics
	accommodation zones
	faults
	deformation
	folds
	boundary faults
	duplexes
	mechanics
	disharmonic folds
	flexural-slip
	triangle zones

decompaction
RT	basin analysis
	compaction
	decompression
	density
	models
	porosity
	pressure
	processes
	reconstruction
	reservoir properties
	sedimentology
	soil mechanics
	tectonics

decomposition
SN	After 1993, see types of weathering, e.g. chemical weathering, physical weathering, or degradation or alteration.

decompression
RT	compression
	decompaction
	geologic barometry
	pressure
	retrograde metamorphism
	tectonics
SN	Added to Thesaurus in 1995.

decontamination
RT	bioreclamation
	dechlorination
	desalinization
	dilution
	drinking water
	ground water
	impurities
	polluted water
	pollution
	potability
	purification
	reclamation
	surface water
	waste water
	water
	water management
	water quality
	water resources
	water treatment
SN	Added to Thesaurus in 1982.

deconvolution
RT	distortion
	elastic waves
	filters
	Kalman filters
	seismology
	wavelets

Decorah Shale
BT	Chronostratigraphic Units
	.Phanerozoic
	..Paleozoic
	...Ordovician
	....Middle Ordovician
	.....Decorah Shale
RT	Iowa
	Missouri
	Illinois
	Wisconsin
	Minnesota
	Millbrig Bentonite Bed
SN	W Illinois, NE Iowa, S Minnesota, N Missouri and SW Wisconsin. Added to Thesaurus in 1989.

decrepitation
RT	chemical analysis
	geologic thermometry
	mineralogy
	sample preparation

Dedham

Dedham Granodiorite
BT	Chronostratigraphic Units
	.Precambrian
	..Proterozoic
	...Dedham Granodiorite
RT	Massachusetts
	New Hampshire
SN	E Massachusetts and SE New Hampshire. Added to Thesaurus in 1989.

dedolomitization
RT	calcitization
	diagenesis
	dolomitization
	processes

deep aquifers
BT	aquifers
	.deep aquifers
RT	ground water
	recharge
	confined aquifers
	permeability
	hydrodynamics
	hydraulic conductivity
	fossil waters
	depth
	shallow aquifers

deep drilling
BT	drilling
	.deep drilling
RT	engineering geology
	KTB
	boreholes
	Echassieres Borehole
	Gravberg Well
	Kola Russian Federation
	Sancerre-Couy Borehole
SN	Added to Thesaurus in 1989.

deep earthquakes
USE	deep-focus earthquakes

deep faults
USE	deep-seated structures

deep focus
SN	A valid term through 1977. After 1977, use deep-focus earthquakes.

deep magnetic sounding
RT	deep sounding
	geophysical methods
	geophysical surveys
	magnetic methods
	sounding
SN	Added to Thesaurus in 1981.

Deep Sea Dr

Deep Sea Drilling Project
NT	IPOD
	Leg 1
	Leg 10
	Leg 11
	Leg 12
	Leg 13
	Leg 14
	Leg 15
	Leg 16
	Leg 17
	Leg 18
	Leg 19
	Leg 2
	Leg 20
	Leg 21
	Leg 22
	Leg 23
	Leg 24
	Leg 25
	Leg 26
	Leg 27
	Leg 28
	Leg 29
	Leg 3
	Leg 30
	Leg 31
	Leg 32
	Leg 33
	Leg 34
	Leg 35
	Leg 36
	Leg 37
	Leg 38
	Leg 39
	Leg 4
	Leg 40
	Leg 41
	Leg 42A
	Leg 42B
	Leg 43
	Leg 44
	Leg 5
	Leg 6
	Leg 7
	Leg 8
	Leg 9
UF	DSDP
RT	ocean basins
	ocean floors
	oceanography
	marine geology
	research vessels
	Glomar Challenger
	JOIDES
	Ocean Drilling Program
SN	See IPOD or Ocean Drilling Program for listings of additional legs and sites.

deep seismic sounding
UF	DSS
	seismic sounding
RT	seismology
	geophysical methods
	geophysical surveys
	geophysics
	seismic methods
	BIRPS
	explosions
	deep sounding
	sounding
	ECORS

deep sounding
RT	deep magnetic sounding
	deep seismic sounding
	echo sounding
	electrical sounding
	frequency sounding
	geophysical methods
	sounding

deep structure
USE	deep-seated structures

deep-focus earthquakes
BT	earthquakes
	.deep-focus earthquakes
UF	deep earthquakes
RT	focus
	shallow-focus earthquakes
	intermediate-focus earthquakes
SN	Before 1978, search earthquakes AND deep focus.

deep-sea
SN	A valid term through 1977. After 1977, use deep-sea environment or (as of 1981) deep-sea sedimentation.

deep-sea environment
BT	marine environment
	.deep-sea environment
UF	abyssal environment
RT	sedimentation
	abyssal hills
	bottom features
	depositional environment
	deep-water environment
	hemipelagic environment
	deep-sea sedimentation
SN	Before 1978, search deep-sea or deep sea.

deep-sea fans
USE	submarine fans

deep-sea sedimentation
BT	sedimentation
	.deep-sea sedimentation
RT	deep-sea environment
SN	Added to Thesaurus in 1981.

deep-sea sediments
SN	Used in subfile N. See marine sediments; deep-sea sedimentation.

deep-seated structures
UF	deep faults
	deep structure
RT	tectonics
	blind faults
SN	Before 1978, search deep-seated.

deep-tow methods
RT	acoustical methods
	geophysical methods
	streamers
SN	Before 1978, search deep-tow.

deep-water environment
RT	anaerobic environment
	aquatic environment
	brackish-water environment
	deep-sea environment
	deltaic environment
	depositional environment
	estuarine environment
	fluvial environment
	fresh-water environment
	glaciofluvial environment
	hemipelagic environment
	hype
SN	Use deep-sea environment if applicable. Added to Thesaurus in 1993.

deepening
USE	dredging

Deer Lake Group
RT	Carboniferous
	Newfoundland Island
	Precambrian
	Wyoming
SN	Carboniferous formation in W Newfoundland. Also a Precambrian formation in SE Wyoming. Indexed with ages as applicable. Added to Thesaurus in 1989.

Deer Lodge County Montana
BT	United States
	.Montana
	..Deer Lodge County Montana
SN	SW Montana.

deerite
BT	silicates
	.chain silicates
	..deerite

defects
RT	crystal dislocations
	crystal structure
	crystallography
	crystals
	deformation
	minerals
	point defects
	stacking
	surface defects

Defiance County Ohio
BT	United States
	.Ohio
	..Defiance County Ohio

definition
RT	classification
	identification
	nomenclature
	photogrammetry
SN	Used as a general term.

Deflandrea
BT	palynomorphs
	.Dinoflagellata
	..Deflandrea
RT	microfossils
SN	Indexed with microfossils if applicable.

deflation
BT	erosion
	.wind erosion
	..deflation
RT	wind transport
	deserts
	dust
	transport
	blowouts
	desert pavement
	loess
	saltation
SN	Restricted. For calderas or other volcanic features, use subsidence.

deflection of the vertical
SN	Before 1972, was used in subfile G.

defo

deforestation
RT	conservation
	ecology
	fires
	forestry
	forests
	land use
	reclamation

deformation
NT	brittle deformation
	ductile deformation
	plastic deformation
RT	anelasticity
	annealing
	Atterberg limits
	axial-plane structures
	biaxial tests
	boudinage
	boundary conditions
	brittle materials
	brittleness
	bulk modulus
	cataclasis
	cleavage
	competent materials
	compression
	compression tectonics
	compressive strength
	coseismic
SN	Used for the process of folding, faulting, shearing, compression, or extension of the rocks as a result of various forces. Also search structural analysis for mid-scale; tectonics for large-scale. Also search ultrastructure for microscopic scale. Before 1

degasification
UF	devolatilization (degasification)
RT	oil and gas fields
	coal
	petroleum
	degassing
	volatilization
	natural gas
	coal seams
SN	As of 1989, restricted to process related to the energy sources such as coal seams, coalbed methane, and oil and gas fields. For process involving the mantle, magmas or atmosphere, use degassing. Added to Thesaurus in 1989.

degassing
UF	devolatilization (degassing)
	outgassing
RT	mantle
	atmosphere
	boiling
	volatilization
	degasification
SN	As of 1989, restricted to outgassing; that is, processes related to the mantle, magmas, atmosphere, etc. For processes concerning the energy sources such as coal seams, coalbed methane or oil and gas fields, use degasification. Before 1995, also search de

deglaciation
UF	glacial recession
RT	glaciers
	glaciation
	Heinrich events
	late-glacial environment

degradation
UF	deterioration
RT	erosion
	soils
	geomorphology
	leaching
	weathering
	biodegradation
	destruction
	fatigue
	denudation
	durability
	land loss
	photolysis
	salinization

Dehra Dun India
BT	Asia
	.Indian Peninsula
	..India
	...Uttar Pradesh India
	....Dehra Dun India
UF	Dehradun India
SN	City in NW Uttar Pradesh, N India.

Dehradun India
USE	Dehra Dun India

dehydr

dehydration
UF	drying
RT	geochemistry
	sediments
	desiccation
	hydration
	water of dehydration

Deimos Satellite
RT	Mars
	satellites
SN	One of satellites of Mars. Added to Thesaurus in 1989.

Deinotherioidea
BT	Chordata
	.Vertebrata
	..Tetrapoda
	...Mammalia
	....Theria
	.....Eutheria
	......Proboscidea
	.......Deinotherioidea
SN	Suborder.

Dekkan Plateau
USE	Deccan Plateau

DEKORP
UF	Deutsches Kontinentales Reflexionsseismisches Profil
RT	reflection methods
	seismic methods
	Germany
SN	Acronym. Added to Thesaurus in 1993.

Del Monte Beach
BT	United States
	.California
	..Monterey County California
	...Del Monte Beach
SN	On Monterey Peninsula in Monterey County in W California.

Del Norte County California
BT	United States
	.California
	..Del Norte County California
RT	Redwood National Park
SN	NW California.

Del Rio Texas
BT	United States
	.Texas
	..Val Verde County Texas
	...Del Rio Texas
SN	City on the Rio Grande in SW Texas.

delafossite
BT	oxides
	.delafossite
RT	iron oxides

Delamerian Orogeny
BT	Chronostratigraphic Units
	.Phanerozoic
	..Paleozoic
	...lower Paleozoic
	....Delamerian Orogeny
RT	Cambrian
	Ordovician
	orogeny
	tectonics
	South Australia
	Australia
	Pan-African Orogeny
	New South Wales Australia
	Tasmania Australia
	Victoria Australia
SN	Cambrian-Ordovician. Southeastern Australia. Indexed with age as applicable. Added to Thesaurus in 1995.

delamination
RT	asthenosphere
	boundary conditions
	clay minerals
	convection
	crust
	crustal thickening
	layered materials
	lithosphere
	mantle
	sheet silicates
	tectonics
SN	Added to Thesaurus in 1995.

Delaware
BT	United States
	.Delaware
NT	Kent County Delaware
	New Castle County Delaware
	Sussex County Delaware
RT	Atlantic Coastal Plain
	Aquia Formation
	Carolina Bays
	Calvert Formation
	Chesapeake Group
	Choptank River
	Cohansey Formation
	Delaware Bay
	Delaware River
	Delaware River basin
	Delmarva Peninsula
	Indian River
	Kirkwood-Cohansey Aquifer
	Magothy Aquifer
	Magothy Fo

Delaware Basin
BT	United States
	.Delaware Basin
RT	New Mexico
	Texas
	Brushy Canyon Formation
	Permian Basin
SN	SE New Mexico and SW Texas. Indexed with states as applicable.

Delaware Bay
BT	United States
	.Delaware Bay
RT	North Atlantic
	Delaware
	New Jersey
SN	Arm of Atlantic Ocean. Indexed with states as applicable.

Delaware County Indiana
BT	Indiana
	.Delaware County Indiana
SN	E Indiana.

Delaware County Iowa
BT	United States
	.Iowa
	..Delaware County Iowa
SN	E Iowa.

Delaware County New York
BT	United States
	.New York
	..Delaware County New York
SN	S New York.

Delaware County Ohio
BT	United States
	.Ohio
	..Delaware County Ohio
SN	Central Ohio.

Delaware County Oklahoma
BT	United States
	.Oklahoma
	..Delaware County Oklahoma
SN	NE Oklahoma.

Delaware County Pennsylvania
BT	United States
	.Pennsylvania
	..Delaware County Pennsylvania
SN	SE Pennsylvania.

Delaware Limestone
BT	Chronostratigraphic Units
	.Phanerozoic
	..Paleozoic
	...Devonian
	....Middle Devonian
	.....Delaware Limestone
RT	Ohio
SN	Overlies Columbus Limestone; underlies Olentangy Shale. Central and N Ohio.

Delaware Mountain Group
BT	Chronostratigraphic Units
	.Phanerozoic
	..Paleozoic
	...Permian
	....Guadalupian
	.....Delaware Mountain Group
RT	Texas
	Bell Canyon Formation
	Brushy Canyon Formation
	Cherry Canyon Formation
SN	W Texas. Added to Thesaurus in 1985.

Delaware River
BT	United States
	.Delaware River
RT	Pennsylvania
	New York
	Delaware
	New Jersey
SN	Flows from S New York SE into Delaware Bay. Indexed with states as applicable.

Delaware River basin
BT	United States
	.Delaware River basin
RT	Pennsylvania
	New York
	Delaware
	New Jersey
SN	Indexed with states as applicable.

Delhi India
BT	Asia
	.Indian Peninsula
	..India
	...Delhi India
NT	New Delhi India
SN	Territory in N central India including the city NNE of New Delhi.

Delhi Supergroup
BT	Chronostratigraphic Units
	.Precambrian
	..Delhi Supergroup
UF	Delhi System
RT	India
	Rajasthan India
	Haryana India
SN	From the Delhi System which included Ajabgarh Series, Hornstone Breccia, Kushalgarh Limestone, Alwar Series, Raialo limestones and quartzes. Hornstone Breccia and Kushalgarh Limestone later confined to NE Rajputana, and Raialos excluded from Delhis to for

Delhi System
USE	Delhi Supergroup

Delinesti Romania
BT	Europe
	.Southern Europe
	..Banat
	...Delinesti Romania
BT	Europe
	.Southern Europe
	..Romania
	...Delinesti Romania
SN	Village in Caras-Severin County in W part of country. This term has multiple hierarchies.

dellenite
BT	igneous rocks
	.volcanic rocks
	..rhyodacites
	...dellenite

Dellys Algeria
BT	Africa
	.North Africa
	..Algeria
	...Dellys Algeria
SN	City on Mediterranean Sea E of Algiers in N Algeria.

Delmarva Peninsula
BT	United States
	.Delmarva Peninsula
RT	Virginia
	Maryland
	Delaware
SN	Between Chesapeake and Delaware bays. Indexed with states as applicable.

Delmas Saskatchewan
BT	Canada
	.Western Canada
	..Saskatchewan
	...Delmas Saskatchewan
SN	Village in W central Saskatchewan.

Delocrinus
BT	Invertebrata
	.Echinodermata
	..Crinozoa
	...Crinoidea
	....Inadunata
	.....Delocrinus
SN	Genus.

DeLong Mountains
USE	De Long Mountains

Delta Area
RT	Netherlands
SN	Netherlands. Indexed with regions as applicable.

Delta County Colorado
BT	United States
	.Colorado
	..Delta County Colorado
SN	W Colorado.

Delta County Michigan
BT	United States
	.Michigan
	..Michigan Upper Peninsula
	...Delta County Michigan
SN	N Michigan.

Delta County Texas
BT	United States
	.Texas
	..Delta County Texas
SN	NE Texas.

delta fans
USE	fan deltas

Delta River
BT	United States
	.Alaska
	..Delta River
RT	Southern Alaska
	East-Central Alaska
	Fairbanks Alaska
	Tanana River
SN	In E Alaska. Joins the Tanana River at Fairbanks. Indexed with Southern Alaska or East-Central Alaska as applicable.

deltaic
SN	A valid term through 1977. After 1977, use deltas or (as of 1981) deltaic environment or deltaic sedimentation.

deltaic env

deltaic environment
RT	coastal environment
	deep-water environment
	deltaic sedimentation
	deltas
	depositional environment
	ecology
	paleoecology
	sedimentation
SN	Added to Thesaurus in 1981.

deltaic sedimentation
BT	sedimentation
	.deltaic sedimentation
RT	deltaic environment
	Gilbert-type deltas
	deltas
SN	Added to Thesaurus in 1981.

deltas
NT	fan deltas
	Gilbert-type deltas
RT	deltaic environment
	deltaic sedimentation
	ecology
	fluvial features
	geomorphology
	paleoecology
	sedimentation
	shore features
SN	As of 1981, use deltaic environment for type of environment.

DEM
SN	Not a valid term for GeoRef. See digital terrain models.

demagnetization
NT	adiabatic demagnetization
	alternating field demagnetization
	chemical demagnetization
	thermal demagnetization
RT	characteristic remanent magnetization
	geophysics
	magnetic hysteresis
	magnetization
	paleomagnetism
	remagnetization
	remanent magnetization

demand
RT	consumption
	economics
	markets
SN	Added to Thesaurus in 1981.

Demopolis Chalk
BT	Chronostratigraphic Units
	.Phanerozoic
	..Mesozoic
	...Cretaceous
	....Upper Cretaceous
	.....Demopolis Chalk
RT	Mississippi
	Alabama
	Bluffport Marl Member
SN	Alabama and E Mississippi. Includes Bluffport Marl Member. Added to Thesaurus in 1989.

Demospongea
BT	Invertebrata
	.Porifera
	..Demospongea

Denali Fault
BT	North America
	.Denali Fault
RT	Alaska
	Yukon Territory
SN	Mount McKinley area in S central Alaska. Extends into Yukon Territory. Indexed with Alaska or Yukon Territory as applicable.

Denali National Park
BT	United States
	.Alaska
	..Denali National Park
UF	Mount McKinley National Park
RT	Alaska Range
	Southern Alaska
	national parks
	East-Central Alaska
SN	Includes Mount McKinley, Alaska Range, S central Alaska. Park name was changed to the Athabascan name in 1980. Indexed with East-Central Alaska and/or Southern Alaska as applicable.

Denbighshire Wales
BT	Europe
	.Western Europe
	..United Kingdom
	...Great Britain
	....Wales
	.....Denbighshire Wales
SN	Former county in N Wales. As of 1975, part of Clwyd. Also search Denbigh and Wales.

dendrochronology
USE	tree rings

dendrograms
BT	statistical analysis
	.dendrograms

Dendroidea
BT	Graptolithina
	.Dendroidea
RT	Invertebrata
	Hemichordata
SN	Indexed with Hemichordata or Invertebrata as applicable.

Dengizkul
RT	Uzbekistan
SN	Lake SW of Bukhara. Indexed with Uzbekistan as applicable.

Dengying Formation
BT	Chronostratigraphic Units
	.Precambrian
	..Proterozoic
	...Sinian
	....Dengying Formation
RT	China
SN	SW China. Added to Thesaurus in 1989.

Denison Trough
BT	Australasia
	.Australia
	..Queensland Australia
	...Denison Trough
SN	SE Queensland, Australia. Added to Thesaurus in 1985.

denitrification
RT	geochemistry

Denmark
BT	Europe
	.Western Europe
	..Scandinavia
	...Denmark
NT	Bornholm
	Copenhagen Denmark
	Djursland
	Helsingor Denmark
	Stevns Klint
	Vendsyssel
	Zealand
RT	Baltic Glaciation
	Baltic region
	Atlantic Ocean Islands
	Oresund
	Baltic Shield
	Fennoscandia
	European Platform
	North Sea Coast
	North Sea region
	Tornquist-Teisseyre Zone
	Jutland
	Zechstein

dense nonaqueous phase liquids
BT	nonaqueous phase liquids
	.dense nonaqueous phase liquids
UF	DNAPLs
RT	pollutants
	liquid phase
	density
	chlorinated hydrocarbons
	oil spills
	leaking underground storage tanks
	light nonaqueous phase liquids
SN	Before 1993, also search DNAPL. Added to Thesaurus in 1993.

densities
USE	density

densities and temperatures
SN	As of 1993, no longer a valid term for GeoRef. Usually out-of-scope. Used with aeronomy.

density
UF	densities
RT	isostasy
	convection currents
	decompaction
	sea water
	bulk density
	buoyancy
	specific gravity
	dense nonaqueous phase liquids
	compactness
	light nonaqueous phase liquids
	density logging

density currents
BT	currents
	.density currents
RT	turbidity currents

density logging
RT	density
	well-logging
SN	Added to Thesaurus in 1985.

Dent County Missouri
BT	United States
	.Missouri
	..Dent County Missouri

Dentalium
BT	Invertebrata
	.Mollusca
	..Scaphopoda
	...Dentalium
SN	Genus.

Denton County Texas
BT	United States
	.Texas
	..Denton County Texas

denudation
RT	degradation
	erosion
	erosion features
	geomorphology
	processes
	resurfacing
	water erosion
	weathering

Denver Basin
BT	United States
	.Denver Basin
UF	D-J Basin
	Denver Julesberg Basin
RT	Wyoming
	Colorado
	Wattenberg Field
	Nebraska
	J Sandstone
SN	Primarily in central and NE Colorado. Indexed with states as applicable.

Denver Colorado
BT	United States
	.Colorado
	..Denver County Colorado
	...Denver Colorado
UF	Denver region
SN	City in NE central Colorado.

Denver County Colorado
BT	United States
	.Colorado
	..Denver County Colorado
NT	Denver Colorado
SN	N central Colorado, coextensive with the city of Denver.

Denver Formation
RT	Colorado
	K-T boundary
	Paleocene
	Upper Cretaceous
SN	Upper Cretaceous and Paleocene. E Colorado. Indexed with ages as applicable. Added to Thesaurus in 1985.

Denver Julesberg Basin
USE	Denver Basin

Denver region
USE	Denver Colorado

deoxyribonucleic acid
USE	DNA

Department of Energy, U.S.
USE	U. S. Department of Energy

depletion
RT	conservation
	mineral resources
	natural resources
	petroleum
	reclamation
	utilization
	water use
SN	As of 1981, restricted to resources. Before 1981, used as a general term.

deposition
RT	accretion
	alluvial fans
	alluvial plains
	cementation
	diagenesis
	Fischer plots
	glacial geology
	glaciation
	Heinrich events
	ice movement
	overbank sediments
	reservoirs
	reworking
	sedimentary structures
	sedimentation
	sediments
	settling
	siltation
	stratification
	u
SN	Before 1998, if applicable, also search sedimentary processes which was chiefly used for economic studies.

depositional environment
UF	environment of deposition
	sedimentary environment
RT	deep-sea environment
	aerobic environment
	anaerobic environment
	alpine environment
	deep-water environment
	aquatic environment
	brackish-water environment
	arctic environment
	arid environment
	coastal environment
	boreal environment
	cave environment
	deltaic env
SN	Use the most specific terms. Before 1993, also search environment AND (deposition or sedimentation). Added to Thesaurus in 1993.

depositional fault
USE	growth faults

depositional remanent magnetization
BT	magnetization
	.remanent magnetization
	..depositional remanent magnetization
UF	detrital remanent magnetization
RT	paleomagnetism

deposits
SN	As of 1981, no longer a valid term for GeoRef. See list C; mineral deposits, genesis; metal ores; nonmetal deposits. Before 1981, included use for all papers on nonmetal commodities.

depressions
RT	basins
	diwa structure
	folds
	geomorphology

depth
RT	deep aquifers
	depth indicators
	dimensions
	Mohorovicic discontinuity
	shallow aquifers
	shallow depth

depth indicators
RT	burial
	burial diagenesis
	depth
	indicators
SN	Added to Thesaurus in 1981.

depth of compensation
USE	carbonate compensation depth

Derby England
BT	Europe
	.Western Europe
	..United Kingdom
	...Great Britain
	....England
	.....Derbyshire England
	......Derby England
SN	City in Derbyshire in central England.

Derbyshire England
BT	Europe
	.Western Europe
	..United Kingdom
	...Great Britain
	....England
	.....Derbyshire England
NT	Derby England
RT	Midlands
	Peak District
SN	County in central England.

Dermaptera
BT	Invertebrata
	.Arthropoda
	..Mandibulata
	...Insecta
	....Pterygota
	.....Neoptera
	......Exopterygota
	.......Dermaptera
UF	Dermapteroida
SN	Order.

Dermapteroida
USE	Dermaptera

Dermoptera
BT	Chordata
	.Vertebrata
	..Tetrapoda
	...Mammalia
	....Theria
	.....Eutheria
	......Insectivora
	.......Dermoptera
SN	Suborder.

Des Moines County Iowa
BT	United States
	.Iowa
	..Des Moines County Iowa

Des Moines Lobe
RT	Iowa
	Laurentide ice sheet
	Minnesota
	South Dakota
SN	Part of Laurentide ice sheet during Wisconsinan glaciation. Added to Thesaurus in 1985.

Des Moines Series
USE	Desmoinesian

desalination
USE	desalinization

desalinization
UF	desalination
RT	soils
	ground water
	leaching
	hydrochemistry
	water resources
	water management
	decontamination
	polluted water
	soil treatment
	water treatment
	drinking water
	potability
	water quality
	salinity
	sea water
	brines
	salt
	dilution
	salinization

Descartes Algeria
BT	Africa
	.North Africa
	..Algeria
	...Oran Algeria
	....Descartes Algeria
SN	Village in NW Algeria.

Deschutes County Oregon
BT	United States
	.Oregon
	..Deschutes County Oregon
NT	Newberry Volcano
SN	Central Oregon.

Deschutes Formation
BT	Chronostratigraphic Units
	.Phanerozoic
	..Cenozoic
	...Neogene
	....Deschutes Formation
RT	Pliocene
	Miocene
	Oregon
SN	Indexed with ages as applicable. Added to Thesaurus in 1989.

Deschutes River
RT	Columbia River
	Oregon
	Puget Sound
	United States
	Washington
SN	Tributary of the Columbia River, N central Oregon. Also a river, in NW Washington, which flows into Puget Sound. Indexed with states as applicable. Added to Thesaurus in 1985.

descloizite
BT	vanadates
	.descloizite

description
RT	landform description
	morphology
SN	Used as a general term.

Desert Basin
SN	Not a valid term for GeoRef. Use Canning Basin if applicable.

Desert Creek Zone
RT	Colorado
	Paradox Basin
	Utah
SN	Paradox Basin of Colorado and Utah. Indexed with states as applicable. Added to Thesaurus in 1989.

desert pavement
BT	eolian features
	.desert pavement
RT	wind erosion
	deserts
	deflation
	talus slopes
SN	Reintroduced. Was not a valid GeoRef index term between 1971 and 1992. Before 1971, used in subfile N. Before 1993, also search eolian features and deserts. Added to Thesaurus in 1993.

desert pediplains
USE	pediplains

desert plains
USE	pediplains

Desert soils
BT	soils
	.Desert soils
RT	soil group
	Zonal soils

desert varnish
USE	rock varnish

desertification
RT	deserts
	ecology
	geomorphology
	processes
	salinization

deserts
BT	eolian features
	.deserts
RT	ecology
	geomorphology
	arid environment
	barchans
	rock varnish
	wadis
	yardangs
	playas
	deflation
	desert pavement
	desertification
	ergs
	sand seas
	sand sheets

Desha County Arkansas
BT	United States
	.Arkansas
	..Desha County Arkansas

desiccation
RT	dehydration
	ecology
	moisture
	pore water
	soils

design
RT	aseismic design
	CAD
	dams
	development
	engineering geology
	foundations
	instruments
	marine installations
	nuclear facilities
	reservoirs
	safety
	shorelines
	tunnels
	underground installations
	waterways

Desmidiales
BT	Plantae
	.algae
	..Chlorophyta
	...Desmidiales
RT	microfossils
SN	Indexed with microfossils if applicable.

desmine
USE	stilbite

Desmoceratida
BT	Invertebrata
	.Mollusca
	..Cephalopoda
	...Tetrabranchiata
	....Ammonoidea
	.....Desmoceratida

Desmoinesian
BT	Chronostratigraphic Units
	.Phanerozoic
	..Paleozoic
	...Carboniferous
	....Pennsylvanian
	.....Middle Pennsylvanian
	......Desmoinesian
NT	Boggy Shale
	Cabaniss Formation
	Cherokee Group
	Hartshorne Sandstone
	Krebs Group
	Labette Shale
	Marmaton Group
	Savanna Formation
	Spiro Sandstone
	Wewoka Formation
UF	Des Moines Series
	Desmoinesian Series
RT	Iowa
	Missouri
	Oklahoma
	Nebraska
	Kansas
	Arkansas
	Manakacha Formation
	Bevier Coal
	Francis Creek Shale
SN	Comprises Cherokee Group, Marmaton Group, Cabaniss Group, and Krebs Group. Subdivided into Venteran and Cygnian substages.

Desmoinesian Series
USE	Desmoinesian

Desmostylia
BT	Chordata
	.Vertebrata
	..Tetrapoda
	...Mammalia
	....Theria
	.....Eutheria
	......Desmostylia
SN	Order.

Desolation Islands
USE	Kerguelen Islands

desorption
RT	adsorption
	geochemistry

desoxyribonucleic acid
USE	DNA

destruction
RT	catastrophes
	corrosion
	damage
	degradation
	geologic hazards
SN	Used as a general term. Also see damage, degradation.

detachment
USE	decollement

detachment faults
BT	faults
	.detachment faults
UF	sole faults
RT	accommodation zones
SN	Added to Thesaurus in 1989.

detection
RT	background level
	chemical analysis
	detection limit
	earthquakes
SN	Appropriate to a large number of general topics.

detection limit
RT	analysis
	background level
	chemical analysis
	detection
	geochemical surveys
	geochemistry
SN	Minimum concentration of a substance which can be determined under specified analytical conditions. Added to Thesaurus in 1995.

detergents
RT	environmental geology
	liquid waste
	surfactants
	waste disposal
	waste water

deterioration
USE	degradation

determination
SN	Not a valid term for GeoRef. For absolute age determination, use absolute age in conjunction with dates.

detrital deposits
RT	detritus
	mineral deposits, genesis
SN	Added to Thesaurus in 1981.

detrital fan
USE	alluvial fans

detrital minerals
USE	detritus

detrital remanent magnetization
USE	depositional remanent magnetization

detrital sedimentation
BT	sedimentation
	.detrital sedimentation
SN	Added to Thesaurus in 1981.

detritus
UF	detrital minerals
RT	abrasion
	erosion
	weathering
	laminite
	debris
	detrital deposits
SN	Also search detrital.

Detroit River
BT	North America
	.Detroit River
RT	Ontario
	Michigan
	Essex County Ontario
	Lake Erie
	Lake Saint Clair
	Wayne County Michigan
	Windsor Ontario
SN	Flows from Lake Saint Clair to Lake Erie. International boundary separates SW Ontario and SE Michigan. Indexed with Michigan and/or Ontario as applicable. Added to Thesaurus in 1993.

Detroit River Group
BT	Chronostratigraphic Units
	.Phanerozoic
	..Paleozoic
	...Devonian
	....Middle Devonian
	.....Detroit River Group
RT	Ontario
	Ohio
	Michigan
	Lucas Formation
	Sylvania Formation
SN	Includes Sylvania Formation, Amherstburg Formation, Lucas Formation. SE Michigan, N Ohio, and W Ontario.

Deuel County Nebraska
BT	United States
	.Nebraska
	..Deuel County Nebraska

Deuel County South Dakota
BT	United States
	.South Dakota
	..Deuel County South Dakota

deuterium
BT	isotopes
	.stable isotopes
	..deuterium
BT	hydrogen
	.deuterium
UF	H-2
RT	D/H
SN	This term has multiple hierarchies.

Deutsche Demokratische Republik
SN	Not a valid term for GeoRef. As of 1993, see Germany and also Mecklenburg-Western Pomerania Germany, Brandenburg Germany, Saxony-Anhalt Germany, Thuringia Germany, and Saxony Germany.

Deutsches Kontinentales Reflexionsseismisches Profil
USE	DEKORP

Deux-Montagnes County Quebec
BT	Canada
	.Eastern Canada
	..Quebec
	...Deux-Montagnes County Quebec

Deux-Sevres France
BT	Europe
	.Western Europe
	..France
	...Deux-Sevres France
RT	Poitou

developing countries
UF	Third World
RT	economics
	industrialized countries
SN	Added to Thesaurus in 1995.

development
RT	design
	economic geology
	exploration
	ground water
SN	Used as a general term.

Devensian
BT	Chronostratigraphic Units
	.Phanerozoic
	..Cenozoic
	...Quarternary
	....Pleistocene
	.....Upper Pleistocene
	......Devensian
NT	upper Devensian
SN	Europe.

deviation, standard
USE	standard deviation

Devils Icebox
RT	Boone County Missouri
SN	Cave in Boone County in central Missouri. Indexed with county or region as applicable.

Devils Lake
RT	North Dakota
	Ramsey County North Dakota
	Sauk County Wisconsin
	Wisconsin
SN	Ramsey County, NE central North Dakota, largest of a group of lakes at N47#DG58'N48#DG15' W098#DG52'W099#DG05'. Before 1989, Devils Lake may also have been used for the neighboring town. Also occurs in other locations, notably Sauk County Wisconsin. Searc

devitrification
RT	geochemistry
	glasses
	lithogeochemistry
	vitrification
	volcanic glass

devolatilization (degasification)
USE	degasification

devolatilization (degassing)
USE	degassing

devolatilization (volatilization)
USE	volatilization

Devoluy
BT	Europe
	.Western Europe
	..France
	...Devoluy
RT	Dauphine
	Dauphine Alps
SN	Limestone range of the Dauphine Pre-Alps in SE France.

Devon
SN	Not a valid term for GeoRef. See Devonshire England.

Devon Island
BT	Canada
	.Northwest Territories
	..Franklin District Northwest Territories
	...Queen Elizabeth Islands
	....Devon Island
NT	Radstock Bay
UF	North Devon Island
SN	N of Baffin Island off Baffin Bay in Franklin District. Also search Devon not England.

Devonian
BT	Chronostratigraphic Units
	.Phanerozoic
	..Paleozoic
	...Devonian
NT	Lower Devonian
	Middle Devonian
	Upper Devonian
	Ackley Granite
	Barre Granite
	Beaverhill Lake Group
	Cedar City Formation
	Chelmsford Granite
	Fisset Brook Formation
	Genesee Group
	Gile Mountain Formation
	Guilmette Formation
	Heemskirk Granite
	Hunsruck Shale
	Keg River Formation
	Levis Shale
	Lilydale Limestone
	Lost Burro Formation
	Miette Complex
	Millboro Shale
	Muth Quartzite
	Old Red Sandstone
	Ramparts Formation
	Slave Point Formation
	Swan Hills Formation
	Traverse Group
	Upper Old Red Sandstone
	Waterways Formation
	Zlichovian
RT	Antler Orogeny
	Chattanooga Shale
	Alice Springs Orogeny
	Beacon Supergroup
	Arkansas Novaculite
	Broken River Formation
	Dalradian
	Bedford Shale
	Berea Sandstone
	Henderson Gneiss
	Geirud Formation
	Catskill Formation
	Galway Granite
	Downtonian
	Earn Group
	Hercynian
SN	Above Silurian, below Carboniferous.

Devonshire England
BT	Europe
	.Western Europe
	..United Kingdom
	...Great Britain
	....England
	.....Devonshire England
NT	Chudleigh England
	Dartmoor
	Exeter England
	Okehampton England
	Teign Valley
	Torquay England
RT	Tamar Estuary
	Cornubian Batholith
	Tamar Valley
SN	County in SW England. Also search Devon and England.

dewatering
SN	As of 1981, no longer a valid term for GeoRef. See drawdown or dehydration or drainage or mine dewatering.

Dewey County Oklahoma
BT	United States
	.Oklahoma
	..Dewey County Oklahoma
SN	W Oklahoma.

Dewey County South Dakota
BT	United States
	.South Dakota
	..Dewey County South Dakota
SN	N central South Dakota.

dextral faults
USE	right-lateral faults

Dhajala Meteorite
BT	meteorites
	.stony meteorites
	..chondrites
	...Dhajala Meteorite
RT	India
	Gujarat India
SN	Impact at Dhajala, Gujarat, W India. Added to Thesaurus in 1989.

Dhanbad India
BT	Asia
	.Indian Peninsula
	..India
	...Bihar India
	....Dhanbad India
SN	Town in SE Bihar, E India.

Dharwar Craton
BT	Asia
	.Indian Peninsula
	..India
	...Dharwar Craton
RT	Chitradurga schist belt
	Kolar schist belt
SN	S Indian Shield. Added to Thesaurus in 1993.

Dharwar India
BT	Asia
	.Indian Peninsula
	..India
	...Karnataka India
	....Dharwar India
SN	City in NW Karnataka. Now part of the joint municipality of Hubli-Dharwar.

Dharwars

Dharwars Supergroup

Dhenkanal India
BT	Asia
	.Indian Peninsula
	..India
	...Orissa India
	....Dhenkanal India
SN	Town and district in E central Orissa, E India.

diabase
BT	igneous rocks
	.plutonic rocks
	..diabase
NT	diabase porphyry
	olivine diabase
	quartz diabase
	tholeiitic dolerite
UF	dolerite
RT	basalts
	trap rocks
	metadiabase
	ophite

diabase porphyry
BT	igneous rocks
	.plutonic rocks
	..diabase
	...diabase porphyry
RT	porphyry

Diablo Plateau
USE	Diablo Platform

Diablo Platform
UF	Diablo Plateau
RT	New Mexico
	Texas
	West Texas
SN	Extreme W Texas and S New Mexico. Indexed with state and counties as applicable.

Diablo Range
RT	California
	Coast Ranges
	Greenville Fault
SN	One of the Coast Ranges in W central California. Indexed with Coast Ranges and counties as applicable.

diachroni

diachronism
UF	heterochrony
RT	biologic evolution
	paleoecology
	stratigraphy
	biostratigraphy
	ontogeny
SN	Concept is used for the appearance of a flora or fauna in a new region during a time period significantly different from the time when it inhabited the old region.

diagenesis
NT	burial diagenesis
	cementation
	chertification
	early diagenesis
	late diagenesis
	syngenesis
RT	alteration
	authigenesis
	calcification
	calcitization
	carbonatization
	coalification
	compaction
	consolidation
	crystallinity
	dedolomitization
	deposition
	dolomitization
	halmyrolysis
	indicators
	lithification
	materials
	metamorphism
	metasomatism
	paleoplacers
	phos
SN	Used for all the chemical, physical and biological changes, modifications, or transformations undergone by a sediment after its initial deposition, and during and after its lithification, exclusive of weathering and metamorphism. Before 1998, if applicabl

diagonal lamination
USE	cross-laminations

diagonal-slip faults
USE	oblique-slip faults

diagrams
SN	As of 1981, no longer a valid term for GeoRef. See graphic methods.

diallagite
BT	igneous rocks
	.plutonic rocks
	..ultramafics
	...diallagite

dialogite
USE	rhodochrosite

diamictite
BT	sedimentary rocks
	.clastic rocks
	..diamictite
UF	mixtite
RT	terrigenous materials

diamicton
BT	sediments
	.clastic sediments
	..diamicton
UF	symmicton
RT	till

diamond
BT	native elements
	.diamond
RT	diamonds
	gems
	carbon
	chaoite
	graphite
	lonsdaleite
	kimberlite
SN	When of economic value, use diamonds.

diamond anvil cells
USE	anvil cells

Diamond Peak Formation
BT	Chronostratigraphic Units
	.Phanerozoic
	..Paleozoic
	...Carboniferous
	....Diamond Peak Formation
RT	Utah
	California
	Nevada
SN	E California, N Nevada and N Utah. Added to Thesaurus in 1989.

diamonds
RT	abrasives
	carbon
	carbonado
	diamond
	gems
	kimberlite
	paleoplacers
	placers
SN	Use only when of economic value. Commodity. See List C.

diaphorite
USE	ultrabasite

diaphthoresis
USE	retrograde metamorphism

diapiric fold
USE	diapirs

diapirism
RT	diapirs
	intrusions
	middle crust
	salt domes
	salt tectonics

diapirs
UF	diapiric fold
	piercement
	piercing fold
RT	cap rocks
	anticlines
	folds
	domes
	flow texture
	salt
	salt domes
	salt tectonics
	diapirism
	mantle plumes
	plumes

Diapsida
BT	Chordata
	.Vertebrata
	..Tetrapoda
	...Reptilia
	....Diapsida
NT	Araeoscelidia
	Archosauria
	Eosuchia
	Ichthyosauria
	Lepidosauria
	Placodontia
	Rhynchosauria
	Sauropterygia
	Trilophosauria
UF	Euryapsida
SN	Subclass. Reptiles with 2 temporal openings (two-arched) in the skull.

diaspore
BT	oxides
	.diaspore
RT	aluminum oxides

diasteranes
BT	organic compounds
	.hydrocarbons
	..diasteranes
UF	dicholestanes
RT	biomarkers
	steranes
SN	'Rearranged steranes' in which methyl groups and hydrogen atoms are exchanged at certain sites. Added to Thesaurus in 1998.

diastrophism
SN	As of 1981, no longer a valid term for GeoRef. See orogeny; epeirogeny.

diatomaceous earth
BT	sedimentary rocks
	.clastic rocks
	..diatomaceous earth
UF	earth, diatomaceous
	tripolite
RT	diatomite
	tripoli
	diatoms
SN	Before 1981, also search diatomite AND sedimentary rocks.

diatomite
RT	abrasives
	clastic rocks
	diatomaceous earth
	tripoli
SN	As of 1981, to be used only if of economic value; otherwise, use diatomaceous earth. See List C for use as a commodity term.

diatoms
BT	Plantae
	.algae
	..diatoms
NT	Melosira
	Navicula
	Nitzschia
RT	microfossils
	phytoplankton
	plankton
	spicules
	diatomaceous earth
	frustules
SN	Indexed with microfossils if applicable.

diatremes
BT	intrusions
	.diatremes
RT	volcanic features
	breccia pipes
	pipes
	volcanic necks

Dibranchiata
BT	Invertebrata
	.Mollusca
	..Cephalopoda
	...Dibranchiata
NT	Belemnoidea
UF	Coleoidea

dibromochloropropane
BT	organic compounds
	.halogenated hydrocarbons
	..chlorinated hydrocarbons
	...dibromochloropropane
RT	propane
SN	Added to Thesaurus in 1989.

dichloro-diphenyl-trichloro-ethane
USE	DDT

dicholestanes
USE	diasteranes

Dickens County Texas
BT	United States
	.Texas
	..Dickens County Texas

Dickenson County Virginia
BT	United States
	.Virginia
	..Dickenson County Virginia
SN	SW Virginia.

Dickey County North Dakota
BT	United States
	.North Dakota
	..Dickey County North Dakota

Dickinson County Iowa
BT	United States
	.Iowa
	..Dickinson County Iowa
RT	Spirit Lake
SN	NW Iowa.

Dickinson County Kansas
BT	United States
	.Kansas
	..Dickinson County Kansas
NT	Abilene Kansas
SN	Central Kansas.

Dickinson County Michigan
BT	United States
	.Michigan
	..Michigan Upper Peninsula
	...Dickinson County Michigan
SN	N Michigan.

dickite
BT	silicates
	.sheet silicates
	..clay minerals
	...dickite

Dickson County Tennessee
BT	United States
	.Tennessee
	..Dickson County Tennessee

dicophane
USE	DDT

Dicotyledoneae
BT	Plantae
	.Spermatophyta
	..Angiospermae
	...Dicotyledoneae
NT	Acer
	Alnus
	Annonaceae
	Artemisia
	Asteridae
	Betula
	Carya
	Caryophyllidae
	Compositae
	Corylus
	Dilleniidae
	Dryas
	Ericaceae
	Euphorbiaceae
	Fagus
	Hamamelididae
	Juglandaceae
	Juglans
	Lauraceae
	Leguminosae
	Magnoliidae
	Myrica
	Nothofagus
	Platanus
	Platycarya
	Pterocarya
	Quercus
	Rosidae
	Salix
	Tilia
	Ulmaceae
	Ulmus
RT	Monocotyledoneae

Dicroidium
BT	Plantae
	.Pteridophyta
	..Filicopsida
	...Dicroidium
RT	Gymnospermae
	Pteridospermae

dictionaries
RT	Arabic
	English
	French
	German
	glossaries
	lexicons
	monographs
	publications
	Russian

Dictyocha
BT	Invertebrata
	.Protista
	..Silicoflagellata
	...Dictyocha
RT	microfossils
SN	Indexed with microfossils if applicable.

Dictyonellidina
BT	Invertebrata
	.Brachiopoda
	..Articulata
	...Dictyonellidina

Dicynodontia
BT	Synapsida
	.Therapsida
	..Dicynodontia
NT	Lystrosaurus
SN	Suborder.

Didacna
BT	Invertebrata
	.Mollusca
	..Bivalvia
	...Didacna
SN	Genus.

Didelphidae
BT	Chordata
	.Vertebrata
	..Tetrapoda
	...Mammalia
	....Theria
	.....Metatheria
	......Marsupialia
	.......Polyprotodontia
	........Didelphidae
SN	Family.

Didymograptina
BT	Graptolithina
	.Graptoloidea
	..Didymograptina
NT	Didymograptus
	Isograptus
RT	Invertebrata
	Hemichordata
SN	Indexed with Hemichordata or Invertebrata as applicable.

Didymograptus
BT	Graptolithina
	.Graptoloidea
	..Didymograptina
	...Didymograptus
RT	Invertebrata
	Hemichordata
SN	Genus. Indexed with Hemichordata or Invertebrata as applicable.

dielectric constant
UF	constant, dielectric
RT	electrical field
	electrical methods
	dielectric properties
	electrical properties

dielectric properties
RT	dielectric constant
	electrical field
	electrical methods
	electrical properties
	properties

Dieppe France
BT	Europe
	.Western Europe
	..France
	...Seine-Maritime France
	....Dieppe France
SN	City on English Channel in N France.

diet
RT	biochemistry
	feeding
	metabolism
	middens
	nutrients
	nutrition
	packrat middens
	paleontology
	predation
	trophic analysis
SN	Added to Thesaurus in 1985.

differential thermal analysis
UF	thermography
RT	spectroscopy
	chemical analysis
	analysis
	clay mineralogy
	clay minerals
	sample preparation
	electron microscopy
	DTA data
	thermal analysis
	thermogravimetric analysis
	X-ray diffraction analysis

differential thermal analysis data
USE	DTA data

differential weathering
BT	weathering
	.differential weathering
RT	differentiation
SN	Before, 1978, also search weathering AND differential.

differentiation
RT	differential weathering
	Earth
	horizon differentiation
	magmatic differentiation
	migration of elements
	zoning
SN	As of 1993, see differential weathering, horizon differentiation, magmatic differentiation for those processes; for metamorphic differentiation, see either zoning or migration of elements.

diffraction
RT	diffractograms
	neutron diffraction analysis
	ocean waves
	reflection
	refraction
	refraction methods
	seismic migration
	seismology
	wave splitting

diffractograms
RT	diffraction
	electron diffraction analysis
	neutron diffraction analysis
	X-ray diffraction analysis
SN	Added to Thesaurus in 1985.

diffusion
RT	absolute age
	advection
	chemical analysis
	diffusivity
	geochemistry
	hydrochemistry
	ion exchange
	meteorology
	ocean circulation
	oceanography
	osmosis
	permeability
	polarography
	processes
	sintering
	thermochronology
SN	See also under specific elements.

diffusivity
RT	diffusion
	geochemistry
	hydrochemistry
	ion exchange
	migration of elements
	thermal diffusivity
SN	Use thermal diffusivity when applicable. Added to Thesaurus in 1985.

diffusivity, thermal
USE	thermal diffusivity

Difunta Group
RT	Coahuila Mexico
	K-T boundary
	lower Paleocene
	Mexico
	Upper Cretaceous
SN	Upper Cretaceous to lower Paleocene. Mexico. Indexed with ages as applicable.

Digby County Nova Scotia
BT	Canada
	.Eastern Canada
	..Maritime Provinces
	...Nova Scotia
	....Digby County Nova Scotia

digenite
BT	sulfides
	.digenite
UF	alpha chalcocite
	blue chalcocite
RT	chalcocite

Digha
BT	Asia
	.Indian Peninsula
	..India
	...West Bengal India
	....Digha
SN	Coastal region in West Bengal along the Bay of Bengal.

digital cartography
BT	cartography
	.digital cartography
UF	automatic cartography
RT	maps
	multispectral scanner
	thematic mapper
	data processing
	digital data
	spatial data
	image analysis
SN	Added to Thesaurus in 1993.

digital data
UF	computer data
	computer files
	machine-readable data
RT	data processing
	geographic information systems
	information systems
	data bases
	data retrieval
	information management
	data handling
	data management
	digitization
	Internet
	digital cartography
	digital line graphs
	digital terrain models
	digital simulation
	spati
SN	Restricted to use for indexing of machine-readable data. As of 1995, see digital cartography, digital line graphs, digital terrain models or digital simulation for discussion of topics. Data processing may also be used with information systems. Added to T

digital elevation models
USE	digital terrain models

digital line graphs
RT	data processing
	digital data
	digitization
	graphic methods
	spatial data
SN	Before 1993, also search DLG. Added to Thesaurus in 1993.

digital relief models
USE	digital terrain models

digital simulation
RT	data processing
	digital data
	image analysis
	mathematical geology
	mathematical models
	models
	pixels
	simulation
	visualization
SN	Before 1978, search digital AND simulation.

digital techniques
SN	As of 1981, no longer a valid term for GeoRef. See data processing.

digital terrain models
UF	digital elevation models
	digital relief models
RT	geomorphology
	data processing
	elevation
	models
	terrain classification
	digital data
	digitization
	spatial data
	image analysis
	relief
	terrains
SN	The abbreviations DEM or DTM were also sometimes used. Added to Thesaurus in 1993.

digitization
RT	data handling
	data processing
	digital data
	digital line graphs
	digital terrain models
SN	Also index digital data if applicable. Added to Thesaurus in 1995.

Digne France
BT	pes-de-Haute Provence France
	.Digne France
SN	City in SE France.

Dijon France
BT	Europe
	.Western Europe
	..France
	...Cote-d'Or France
	....Dijon France
SN	City in E central France.

dike swarms
RT	dikes
	igneous rocks
	intrusions
	ring dikes
	swarms

dikes
BT	intrusions
	.dikes
NT	ring dikes
	sheeted dikes
UF	dykes
RT	igneous rocks
	ring structures
	batholiths
	laccoliths
	clastic dikes
	ring complexes
	dike swarms
	sills

dilatancy
RT	deformation
	dilation
	dilatometers
	earthquakes
	geophysics
	seismology

dilatation
USE	dilation

dilatational wave
USE	P-waves

dilation
UF	dilatation
RT	dilatancy
	dilatometers
SN	Used as a general term.

dilatometers
RT	dilatancy
	dilation
	instruments
	seismology
SN	Added to Thesaurus in 1985.

Dilleniidae
BT	Plantae
	.Spermatophyta
	..Angiospermae
	...Dicotyledoneae
	....Dilleniidae

Dillon Colorado
BT	United States
	.Colorado
	..Summit County Colorado
	...Dillon Colorado
SN	Town in N central Colorado.

Dillon County South Carolina
BT	United States
	.South Carolina
	..Dillon County South Carolina

dilution
RT	concentration
	decontamination
	desalinization
	geochemistry
	polluted water
	pollution
	saturation
	water treatment
SN	Added to Thesaurus in 1982.

dimension stone
BT	construction materials
	.dimension stone
UF	stone, dimension
RT	weathering
	conservation
	building stone
	granite deposits
	limestone deposits
	marble deposits
	sandstone deposits
SN	Includes use both as a commodity term and an engineering material. See List C for use as a commodity.

dimensions
RT	cell dimensions
	depth
	grain size
	grains

dimethyl sulfide
UF	methanethiomethane
	methyl sulfide
RT	geochemistry
SN	Added to Thesaurus in 1989.

Dimitrovo coal basin
USE	Pernik coal basin

Dimmit County Texas
BT	United States
	.Texas
	..Dimmit County Texas
SN	SW Texas.

dimorphism
SN	As of 1981, no longer a valid term for GeoRef. See polymorphism or sexual dimorphism.

Dinant Basin
BT	Europe
	.Western Europe
	..Belgium
	...Namur Belgium
	....Dinant Basin
SN	S Belgium.

Dinant Belgium
BT	Europe
	.Western Europe
	..Belgium
	...Namur Belgium
	....Dinant Belgium
SN	Town in S Belgium.

Dinantian
BT	Chronostratigraphic Units
	.Phanerozoic
	..Paleozoic
	...Carboniferous
	....Dinantian
NT	Asbian
	Tournaisian
	Visean
UF	Lower Carboniferous
RT	Mississippian
	Acadian Phase
	Martin Formation
	Avonian
	Culm
	Upper Carboniferous
	Horton Group
	Middle Carboniferous
	Waulsortian facies
SN	Europe. Includes Tournaisian and Visean. As of 1981, used for Lower Carboniferous.

Dinaric Alps
BT	Europe
	.Southern Europe
	..Dinaric Alps
BT	Europe
	.Alps
	..Eastern Alps
	...Dinaric Alps
NT	Velebit Mountains
	Zlatibor Mountains
RT	Albania
	Croatia
	Slovenia
	Yugoslavia
	Northern Limestone Alps
	Greece
	Karst region
	Trieste Italy
SN	SE division of Eastern Alps along Adriatic Sea. Also search Dinaric or Dinarides. This term has multiple hierarchies. Indexed with countries or regions and mountain ranges as applicable.

Dingle Peninsula
BT	Europe
	.Western Europe
	..Ireland
	...Kerry Ireland
	....Dingle Peninsula
SN	Juts into Atlantic in W County Kerry, SW Ireland.

Dinocerata
BT	Chordata
	.Vertebrata
	..Tetrapoda
	...Mammalia
	....Theria
	.....Eutheria
	......Amblypoda
	.......Dinocerata
RT	Ungulata
SN	Suborder.

Dinoflagellata
BT	palynomorphs
	.Dinoflagellata
NT	Deflandrea
	Hystrichosphaeridae
	Peridinium
UF	Dinophyceae
RT	microfossils
	acritarchs
	eutrophication
	plankton
	Pyrrhophyta
SN	Hystrichosphaeridae is included here and under acritarchs. Indexed with microfossils if applicable.

Dinophyceae
USE	Dinoflagellata

Dinosaur National Monument
BT	United States
	.Dinosaur National Monument
RT	Utah
	Colorado
	national monuments
	Moffat County Colorado
	Uintah County Utah
SN	NE Utah and NW Colorado. Indexed with states and counties as applicable. Added to Thesaurus in 1985.

dinosaur nests
USE	nests

Dinosaur Provincial Park
BT	Canada
	.Western Canada
	..Alberta
	...Dinosaur Provincial Park
SN	E of the town of Brooks in SE Alberta. Added to Thesaurus in 1993.

Dinosauria
USE	dinosaurs

dinosaurs
BT	Chordata
	.Vertebrata
	..Tetrapoda
	...Reptilia
	....dinosaurs
NT	Ornithischia
	Saurischia
UF	Dinosauria
RT	horns
	biostratigraphy
	nests
	carnivorous taxa

Dinwiddie County Virginia
BT	United States
	.Virginia
	..Dinwiddie County Virginia
RT	Petersburg Virginia
SN	SE central Virginia. Also search Petersburg Virginia if applicable.

Dinwoody Formation
BT	Chronostratigraphic Units
	.Phanerozoic
	..Mesozoic
	...Triassic
	....Lower Triassic
	.....Dinwoody Formation
RT	Idaho
	Utah
	Wyoming
	Montana
SN	W Wyoming, SE Idaho, SW Montana and NE Utah. Added to Thesaurus in 1985.

diogenite
BT	meteorites
	.stony meteorites
	..achondrites
	...diogenite
SN	Added to Thesaurus in 1981.

Diois
BT	Europe
	.Western Europe
	..France
	...Drome France
	....Diois
SN	Massif in SE France.

Dione Satellite
RT	icy satellites
	satellites
	Saturn
	Voyager Program
SN	One of the satellites of Saturn. Before 1985, also search Dione AND Saturn. Added to Thesaurus in 1985.

diopside
BT	silicates
	.chain silicates
	..pyroxene group
	...clinopyroxene
	....diopside
RT	fassaite
	chrome diopside
	salite

diorite family
SN	As of 1981, no longer a valid term for GeoRef. Use diorites, alkali diorites, or quartz diorites as applicable.

diorite porphyry
BT	igneous rocks
	.plutonic rocks
	..diorites
	...diorite porphyry
RT	porphyry
	volcanic rocks

diorites
BT	igneous rocks
	.plutonic rocks
	..diorites
NT	alkali diorites
	diorite porphyry
	ferrodiorite
	mangerite
	microdiorite
	monzodiorite
	plagiogranite
	quartz diorites
	syenodiorite
	tonalite
	trondhjemite
RT	appinite
	metadiorite
SN	Before 1981, search diorite family.

dioxin
USE	dioxins

dioxins
BT	organic compounds
	.dioxins
UF	dioxin
	TCDD
RT	pollutants
	toxic materials
	carcinogens
	chlorinated hydrocarbons
	hazardous waste
SN	Family of more than 70 chlorinated dioxins. The commonly accepted name for its most toxic member, 2, 3, 7, 8-tetrachlorodibenzo-#2R-dioxin (TCDD) is dioxin. Dioxin is a byproduct of the manufacture of polychlorinated phenols and occurs as a contaminant of

dip
UF	angle of dip
RT	structural analysis
	strike
	dipmeter logging
	dip-slip faults
	orientation
SN	Before 1978, included use for dip faults and dip fractures.

dip faults
BT	faults
	.dip faults
SN	Before 1978, search faults AND dip.

dip fractures
BT	fractures
	.dip fractures
SN	Before 1978, search dip AND fractures.

dip moveout
RT	arrival time
	moveout
	prestack migration
	reflection methods
	seismic methods
	seismic migration
	traveltime
SN	Difference in source-to-geophone arrival times from reflector dip. Added to Thesaurus in 1993.

dip-slip faults
BT	faults
	.dip-slip faults
RT	transfer faults
	dip
	displacements
SN	Before 1978, search faults AND dip-slip.

Diplocraterion
BT	ichnofossils
	.Diplocraterion
SN	Genus.

Diplodocus
BT	Chordata
	.Vertebrata
	..Tetrapoda
	...Reptilia
	....Diapsida
	.....Archosauria
	......Saurischia
	.......Sauropodomorpha
	........Sauropoda
	.........Diplodocus
SN	Genus. This term has multiple hierarchies.

Diplograptina
BT	Graptolithina
	.Graptoloidea
	..Diplograptina
RT	Invertebrata
	Hemichordata
SN	Indexed with Hemichordata or Invertebrata as applicable.

dipmeter logging
BT	well-logging
	.dipmeter logging
RT	boreholes
	Formation MicroScanner
	dip
SN	Before 1978, also search well-logging AND dipmeter or dip-meter.

Dipnoi
BT	Chordata
	.Vertebrata
	..Pisces
	...Osteichthyes
	....Sarcopterygii
	.....Dipnoi
SN	Order.

dipole moment
RT	magnetic field
	paleomagnetism

dipole-dipole methods
BT	geophysical methods
	.electrical methods
	..dipole-dipole methods
RT	geophysical surveys
	resistivity
	electromagnetic methods
	induced polarization
	potentiometry
SN	Used in induced polarization, electrical and electromagnetic methods. Also search dipole-dipole arrays. Indexed with applicable methods. For surveys, also index geophysical surveys. Added to Thesaurus in 1995.

Diprotodonta
BT	Chordata
	.Vertebrata
	..Tetrapoda
	...Mammalia
	....Theria
	.....Metatheria
	......Marsupialia
	.......Diprotodonta
NT	Macropodidae
SN	Suborder.

Diptera
BT	Invertebrata
	.Arthropoda
	..Mandibulata
	...Insecta
	....Pterygota
	.....Neoptera
	......Endopterygota
	.......Diptera
NT	Chironomidae
RT	Raphidiodea
SN	Before 1993, also search Dipteri and Insecta.

dipyrite
USE	pyrrhotite

direct current methods
USE	direct-current methods

direct hydrocarbon indicators
USE	hydrocarbon indicators

direct magnetization
BT	magnetization
	.direct magnetization
SN	Added to Thesaurus in 1981.

direct problem
UF	forward problem
RT	seismology
	geophysics
	inverse problem
SN	Added to Thesaurus in 1981.

direct-current methods
BT	geophysical methods
	.electrical methods
	..direct-current methods
UF	direct current methods
RT	geophysical surveys
	potentiometry
SN	Added to Thesaurus in 1985.

directions, current
USE	current directions

directory
RT	guidebook
	monographs
	publications

discharge
RT	effluents
	flowmeters
	ground water
	hydrologic cycle
	hydrology
	MODFLOW
	recharge
	runoff
	sand boils
	springs
	streamflow
	water balance
	water recovery
SN	Before 1981, also used for effluents.

Discoasteridae
BT	Plantae
	.algae
	..nannofossils
	...Discoasteridae
NT	Ethmodiscus
RT	microfossils
	Coccolithophoraceae
	Sphenolithus
SN	Indexed with microfossils if applicable.

Discocyclina
BT	Invertebrata
	.Protista
	..Foraminifera
	...Rotaliina
	....Orbitoidacea
	.....Discocyclina
RT	microfossils
SN	Genus. Indexed with microfossils if applicable.

disconformities
USE	erosional unconformities

discontinuities
NT	horizontal discontinuities
	tangential discontinuities
	vertical discontinuities
UF	seismic discontinuities
RT	410-km discontinuity
	mantle
	seismology
	670-km discontinuity
	crust
	Mohorovicic discontinuity
	Conrad discontinuity
	middle crust
	curved seismic interface
	inclined seismic interface
SN	Restricted to use for interface in seismology. For stratigraphic discontinuities use unconformities.

discontinuous materials
RT	engineering geology
	materials
SN	Added to Thesaurus in 1981.

Discorbacea
BT	Invertebrata
	.Protista
	..Foraminifera
	...Rotaliina
	....Discorbacea
RT	microfossils
SN	Indexed with microfossils if applicable.

discordant folds
BT	folds
	.discordant folds
RT	orientation
SN	Before 1978, also search folds AND discordant.

discoveries
UF	discovery
RT	mineral deposits, genesis
	placers
	economic geology
	mineral exploration
	coal exploration
	evaluation
SN	As of 1981, restricted to economic geology. Before 1981, used as a general term.

discovery
USE	discoveries

Discovery Bay
RT	Discovery Bay Jamaica
	Jefferson County Washington
	South Australia
	Victoria Australia
	Washington
SN	Bay in Jefferson County, W Washington. Also an inlet of the Indian Ocean bordering South Australia and Victoria. As of 1993, see Discovery Bay Jamaica for the village. Indexed with regions as applicable.

Discovery Bay Jamaica
BT	Caribbean region
	.West Indies
	..Antilles
	...Greater Antilles
	....Jamaica
	.....Discovery Bay Jamaica
RT	Discovery Bay
SN	Village on central N coast of Jamaica.

Discovery Deep
BT	Indian Ocean
	.Red Sea
	..Discovery Deep
SN	Also search Discovery AND deeps.

discrete filters
RT	analog filters
	filters
	Fourier analysis
SN	Added to Thesaurus in 1981.

discriminant analysis
BT	statistical analysis
	.discriminant analysis
UF	discriminant function analysis
RT	analysis
	Bayesian analysis

discriminant function analysis
USE	discriminant analysis

disequilibrium
USE	equilibrium

disharmonic folds
BT	folds
	.disharmonic folds
RT	decollement
	flexural-slip
	harmonic folds
SN	Before 1978, also search folds AND disharmonic.

disjunctive folds
BT	folds
	.disjunctive folds
SN	Added to Thesaurus in 1982.

Disko Island
BT	Arctic region
	.Greenland
	..Disko Island
RT	Davis Strait
SN	Davis Strait just off SW Greenland. Also search Disko.

dislocation creep
BT	deformation
	.plastic deformation
	..dislocation creep
RT	creep
	rheology

dislocations
SN	As of 1981, no longer a valid term for GeoRef. For dislocations within crystals, use crystal dislocations.

dispersion
SN	No longer a valid term for GeoRef. See chemical dispersion or wave dispersion or optical dispersion. From 1981-1992 was used for the chemical process of dispersion. Before 1981, included use as a general term for dispersal; also search dispersal.

dispersion patterns
RT	dispersivity
	geochemical methods
	haloes
	leakage anomalies
	mineral exploration
	patterns
	primary dispersion
	secondary dispersion

dispersion, wave
USE	wave dispersion

dispersive filters
RT	filters
SN	Added to Thesaurus in 1981.

dispersivity
RT	aquifers
	chemical dispersion
	dispersion patterns
	properties
	rock mechanics
	waste disposal
SN	Aquifer rock property. Added to Thesaurus in 1989.

displacement theory

displacements
RT	dip-slip faults
	drag folds
	faults
	nappes
	overthrust faults
	reactivation
	reverse faults
	seismic moment
	slip rates
	transcurrent faults
	transform faults
	wrench faults
SN	Restricted to use for faults.

display, graphic
USE	graphic display

disposal barriers
UF	clay liners
	containment liners
	liners
	soil liners
RT	reclamation
	soils
	waste disposal
	clay
	permeability
	waste management
	tailings
	grouting
	landfills
SN	Before 1993, also search clay liners, soil liners, earthen liners, liners and barriers; AND waste disposal. Added to Thesaurus in 1993.

disposal, waste
USE	waste disposal

disseminated deposits
RT	carlin-type deposits
	mineral deposits, genesis
SN	Before 1978, search disseminated AND ore deposits; search deposits AND disseminated.

dissertations
USE	theses

dissipation
SN	As of 1981, no longer a valid term for GeoRef. Before 1981, used as a general term.

dissociation
RT	electrolysis
	geochemistry
	processes

dissolution
SN	A valid term through May 1978. After May 1978, use solution or solutions.

dissolved materials
RT	hydrochemistry
	materials
	solubility
	solute transport
	solutes
	suspended materials
SN	Before 1978, search dissolved.

Distephanus
BT	Invertebrata
	.Protista
	..Silicoflagellata
	...Distephanus
RT	microfossils
SN	Indexed with microfossils if applicable.

distortion
RT	amplitude distortion
	backscattering
	deconvolution
	deformation
	elastic waves
	filters
	linear distortion
	non-linear distortion
	phase distortion
	seismology
	signal distortion
	strain
	wave absorption
	wave amplification
	wave dispersion

distribution
RT	asymmetric distribution
	cosmopolitan taxa
	power law
	size distribution
	spatial distribution
	statistical distribution
	temporal distribution

distribution coefficients
USE	partition coefficients

District of Algoma
USE	Algoma District Ontario

District of Cochrane
USE	Cochrane District Ontario

District of Columbia
BT	United States
	.District of Columbia
RT	Anacostia River basin
	Potomac River
	Potomac River basin
	Rock Creek Park
	Smithsonian Institution
	Wicomico Formation

District of Franklin
USE	Franklin District Northwest Territories

District of Keewatin
USE	Keewatin District Northwest Territories

District of Kenora
USE	Kenora District Ontario

District of Mackenzie
USE	Mackenzie District Northwest Territories

District of Nipissing
USE	Nipissing District Ontario

District of Sudbury
USE	Sudbury District Ontario

District of Temiscamingue
USE	Timiskaming District Ontario

District of Temiskaming
USE	Timiskaming District Ontario

District of Thunder Bay
USE	Thunder Bay District Ontario

District of Timiskaming
USE	Timiskaming District Ontario

Distrito Federal
SN	Not a valid term for GeoRef. Term used where it is larger than the city it contains. As of 1993, see Buenos Aires Argentina, Federal District Mexico, or Federal District Venezuela as applicable.

disturbances
SN	As of 1993, no longer a valid term for GeoRef. Usually out-of-scope. Used with ionosphere and magnetosphere. Term was restricted to extraterrestrial phenomena.

Disturbed Belt
BT	North America
	.Disturbed Belt
RT	Alberta
	Canada
	United States
	Montana
	Belt Supergroup
	Rocky Mountains
SN	Structural unit, W Montana and S Alberta. Added to Thesaurus in 1985.

diterpanes
BT	organic compounds
	.hydrocarbons
	..diterpanes
RT	biomarkers
	terpanes
	triterpanes
SN	Added to Thesaurus in 1989.

dithionite-citrate-bicarbonate method
USE	citrate-bicarbonate-dithionite method

Ditrau Romania
BT	Europe
	.Southern Europe
	..Romania
	...Transylvania
	....Mures Romania
	.....Ditrau Romania
SN	Town in Mures County in Transylvania, E central Romania.

Dittonian
BT	Chronostratigraphic Units
	.Phanerozoic
	..Paleozoic
	...Devonian
	....Lower Devonian
	.....Dittonian
RT	Old Red Sandstone
SN	In Old Red Sandstone, England: upper Gedinnian; above Downtonian.

diurnal variations
UF	daily variation
RT	magnetic field
	variations
SN	Also search diurnal.

divergence, plate
USE	plate divergence

divergent plate boundaries
USE	accreting plate boundary

diversity
SN	No longer a valid term for GeoRef. As of 1995, see biodiversity, species diversity, or use other specific type.

Divide County North Dakota
BT	United States
	.North Dakota
	..Divide County North Dakota

divides, drainage
SN	Not a valid term for GeoRef. See watersheds or drainage basins (catchments).

Divnoe Meteorite
BT	meteorites
	.stony meteorites
	..Divnoe Meteorite
UF	Divnoye Meteorite
RT	Ukraine
SN	Found near Divnoe, Stavropol region, Ukraine.

Divnoye Meteorite
USE	Divnoe Meteorite

diwa structure
RT	depressions
	structural controls
	tectonics
SN	Added to Thesaurus in 1995.

diwa-type deposits
RT	coal
	genesis
	metal ores
	mineral deposits, genesis
	petroleum

Dixie County Florida
BT	United States
	.Florida
	..Dixie County Florida

Dixie Valley
RT	Churchill County Nevada
SN	Churchill County in W Nevada. Indexed with county or region as applicable.

Dixon County Nebraska
BT	United States
	.Nebraska
	..Dixon County Nebraska

Djadjerud Valley
BT	Asia
	.Middle East
	..Iran
	...Djadjerud Valley

Djadokhta Formation
BT	Chronostratigraphic Units
	.Phanerozoic
	..Mesozoic
	...Cretaceous
	....Upper Cretaceous
	.....Djadokhta Formation
RT	Mongolia
SN	In the Gobi Desert.

Djeddah Saudi Arabia
USE	Jeddah Saudi Arabia

Djibouti
BT	Africa
	.East Africa
	..Djibouti
UF	Afars and Issas Territory
	French Somaliland
RT	Afar
	Asal Rift
	Red Sea Basin
SN	Became independent June 27, 1977. Formerly French Territory of the Afars and Issas. Capital city also named Djibouti.

Djiddah Saudi Arabia
USE	Jeddah Saudi Arabia

djurleite
BT	sulfides
	.djurleite

Djursland
BT	Europe
	.Western Europe
	..Scandinavia
	...Denmark
	....Djursland
BT	Europe
	.Jutland
	..Djursland
SN	Peninsula of Arhus County jutting into the Kattegat in E Jutland. This term has multiple hierarchies.

DLG
SN	Not a valid term for GeoRef. After 1993, see digital line graphs.

DNA
UF	deoxyribonucleic acid
	desoxyribonucleic acid
RT	acids
	organic acids
	RNA
	biologic evolution
	molecular biology
	biodiversity
	life origin
SN	Acronym. Added to Thesaurus in 1989.

DNAG
UF	Decade of North American Geology
RT	North America
	GSA
SN	Acronym. Series of projects sponsored by the Geological Society of America. Added to Thesaurus in 1989.

DNAPLs
USE	dense nonaqueous phase liquids

Dnepropetrovsk Ukraine
BT	Europe
	.Ukraine
	..Dnepropetrovsk Ukraine
NT	Krivoy Rog Ukraine
	Nikopol Ukraine
	Pavlograd Ukraine
	Saksagan River
	Verkhovtsevo Ukraine
RT	Krivoy Rog Basin
SN	Oblast in E central Ukraine. Also the city. This term has multiple hierarchies.

Dnieper Basin
BT	Europe
	.Dnieper Basin
BT	Commonwealth of Independent States
	.Dnieper Basin
UF	Dnieper region
RT	Russian Federation
	Ukraine
	Belarus
	Dnieper-Donets Basin
SN	River drainage basin. Before 1978, also search Dnieper. This term has multiple hierarchies. Indexed with former Soviet republics as applicable.

Dnieper region
USE	Dnieper Basin

Dnieper River
BT	Europe
	.Dnieper River
BT	Commonwealth of Independent States
	.Dnieper River
RT	Russian Federation
	Ukraine
	Belarus
SN	Rises in S Valdai Hills and flows S, then SE into a big bend at Dnepropetrovsk, and finally into the Black Sea near Kherson. Also search Dnieper. This term has multiple hierarchies. Indexed with former Soviet republics as applicable.

Dnieper-Donets Basin
BT	Europe
	.Dnieper-Donets Basin
BT	Commonwealth of Independent States
	.Dnieper-Donets Basin
BT	Russian Platform
	.Dnieper-Donets Basin
UF	Dnieper-Donets Depression
	Dnieper-Donets region
RT	Russian Federation
	Ukraine
	Dnieper Basin
	Donets Basin
	Korenevskaya Formation
SN	Region comprising the Donets Basin and that part of the Dnieper Basin in the nearby Dnepropetrovsk area. Also search Dnieper-Donets. This term has multiple hierarchies. Indexed with former Soviet republics as applicable.

Dnieper-Donets Depression
USE	Dnieper-Donets Basin

Dnieper-Donets region
USE	Dnieper-Donets Basin

Dniest

Dniester River
BT	Europe
	.Dniester River
BT	Commonwealth of Independent States
	.Dniester River
RT	Ukraine
	Moldavia
	Moldova
SN	Flows into Black Sea SW of Odessa. Also search Dniester, Dniester region, Dniester Valley. This term has multiple hierarchies. Indexed with former Soviet republics as applicable.

Dniester-Prut Interfluve
BT	Europe
	.Dniester-Prut Interfluve
RT	Ukraine
	Moldavia
	Moldova
	Prut River
SN	Area between the two rivers. Includes all of Moldavia in Moldova which formerly was Bessarabia. Indexed with republics as applicable.

Doberlug Germany
BT	Europe
	.Central Europe
	..Germany
	...Brandenburg Germany
	....Doberlug Germany
RT	Upper Lusatia
SN	Town in Brandenburg, E Germany. Before 1993, Doberlug was used with Cottbus Bezirk in East Germany. Before 1993, also search Doberlug-Kirchhain.

Doboy Sound
BT	United States
	.Georgia
	..McIntosh County Georgia
	...Doboy Sound
SN	On the Atlantic Ocean in McIntosh County, SE Georgia.

Dobrogea
USE	Romanian Dobruja

Dobrudja
USE	Dobruja Basin

Dobrudzha
USE	Dobruja Basin

Dobruja Basin
BT	Europe
	.Southern Europe
	..Dobruja Basin
NT	Bulgarian Dobruja
	Romanian Dobruja
UF	Dobrudja
	Dobrudzha
RT	Romania
	Bulgaria
	Black Sea region
SN	Black Sea coastal strip S of the Danube River including NE Bulgaria. Indexed with countries as applicable.

Dobrzyn Poland
BT	Europe
	.Central Europe
	..Poland
	...Dobrzyn Poland
RT	Bydgoszcz Poland
SN	Town in Wlockawek Province, N central Poland.

Dockum Group
BT	Chronostratigraphic Units
	.Phanerozoic
	..Mesozoic
	...Triassic
	....Upper Triassic
	.....Dockum Group
RT	New Mexico
	Oklahoma
	Colorado
	Texas
	Kansas
	Chinle Formation
	Santa Rosa Sandstone
SN	Includes Sloan Canyon Formation, Sheep Pen Canyon Formation, Tecovas Shale, Santa Rosa Sandstone, Chinle Formation, Pierce Canyon Redbeds, Baldy Hill Formation, Travesser Formation. Colorado, Kansas, Oklahoma, New Mexico, and W Texas.

Docodonta
BT	Chordata
	.Vertebrata
	..Tetrapoda
	...Mammalia
	....Docodonta
SN	Order.

Doda
RT	India
	Jammu and Kashmir
	Pakistan
SN	Village in SW Jammu and Kashmir, disputed territory between India and Pakistan. Before 1993, India was a broader term. Indexed with Jammu and Kashmir AND India and/or Pakistan as applicable.

Doddridge County West Virginia
BT	United States
	.West Virginia
	..Doddridge County West Virginia

Dodecanese
BT	Mediterranean region
	.Aegean Islands
	..Greek Aegean Islands
	...Dodecanese
NT	Karpathos
	Rhodes
RT	Kos
SN	Group of islands in SE Aegean Sea. Also a Greek department. This term has multiple hierarchies.

Dodge County Georgia
BT	United States
	.Georgia
	..Dodge County Georgia
SN	S central Georgia.

Dodge County Minnesota
BT	United States
	.Minnesota
	..Dodge County Minnesota
SN	SE Minnesota.

Dodge County Nebraska
BT	United States
	.Nebraska
	..Dodge County Nebraska
SN	E Nebraska.

Dodge County Wisconsin
BT	United States
	.Wisconsin
	..Dodge County Wisconsin
SN	S central Wisconsin.

DOE
USE	U. S. Department of Energy

Dogger
BT	Chronostratigraphic Units
	.Phanerozoic
	..Mesozoic
	...Jurassic
	....Middle Jurassic
	.....Dogger
RT	Aalenian
	Bajocian
	Bathonian
	Callovian
SN	Europe. Above Lias (Lower Jurassic), below Malm.

Dogger Bank
BT	Atlantic Ocean
	.North Atlantic
	..North Sea
	...Dogger Bank
SN	Submerged sand bank.

Dogo
BT	nshu
	.Dogo
RT	volcanoes
	Hiroshima Japan
	Shimane Japan
	Tottori Japan
	Dogo Island
SN	Volcano on Hiroshima-Tottori prefectural border, W Honshu. Before 1993, also used for the largest of the Oki Islands off W coast of Honshu in Japan Sea. After 1992, see Dogo Island.

Dogo Island
BT	nshu
	.Shimane Japan
	..Oki Islands
	...Dogo Island
RT	Dogo
SN	Largest of the Oki Islands off W coast of Honshu in Japan Sea. Before 1993, also search Dogo AND Oki Islands. Added to Thesaurus in 1993.

Dogtooth Mountains
BT	Canada
	.Western Canada
	..British Columbia
	...Dogtooth Mountains
SN	In SE British Columbia.

Doig Formation
BT	Chronostratigraphic Units
	.Phanerozoic
	..Mesozoic
	...Triassic
	....Middle Triassic
	.....Doig Formation
RT	Alberta
	British Columbia
SN	Middle Triassic. Alberta and British Columbia. Added to Thesaurus in 1995.

dolerite
USE	diabase

Dolgan-Nenets Russian Federation
USE	Taymyr Dolgan-Nenets Russian Federation

Dolina Ukraine
BT	Europe
	.Ukraine
	..Dolina Ukraine
RT	Lvov Ukraine
SN	City in Lvov Oblast in W Ukraine. This term has multiple hierarchies.

dolinen
USE	dolines

dolines
UF	dolinen
RT	hydrogeology
	karst
	sinkholes

dolomite
BT	carbonates
	.dolomite
UF	bitter spar
	magnesian spar
RT	calcite
	chemically precipitated rocks
	evaporites
	ankerite
	carbonate rocks
	marbles
	light minerals
	dolomitization
	carbonate sediments
	dolostone
	dolomitic composition
	dolomitic limestone
	kutnahorite
SN	For sediments, use carbonate sediments; dolomitic composition. To indicate the rock made of dolomite, use dolostone. Before 1976, also search dolomite for the commodity, the rock, and the sediment.

Dolomite Alps
USE	Dolomites

dolomite marble
SN	A valid metamorphic rock term through 1977. After 1977, use marbles AND dolomite.

Dolomites
BT	Europe
	.Alps
	..Eastern Alps
	...Dolomites
NT	Cima d'Asta
	Latemar Massif
	Lessini Mountains
UF	Dolomite Alps
RT	Tyrol Austria
	Trentino-Alto Adige Italy
	Veneto Italy
	Marmolada Glacier
SN	Mountain range of the Eastern Alps between the Adige and Piave river valleys in NE Italy. Indexed with autonomous regions as applicable.

dolomitic composition
RT	composition
	dolomite
	dolomitization
	dolostone
	dolostone deposits
	sedimentary rocks
	sediments
SN	Before 1978, also search composition AND dolomitic.

dolomitic limestone
BT	sedimentary rocks
	.carbonate rocks
	..limestone
	...dolomitic limestone
UF	magnesian limestone
RT	dolomite
	dolomitization
	dolostone
SN	Added to Thesaurus in 1981.

dolomitite
USE	dolostone

dolomitization
BT	carbonatization
	.dolomitization
RT	sedimentation
	processes
	sedimentary rocks
	metasomatism
	limestone
	diagenesis
	sediments
	dolomite
	calcitization
	dedolomitization
	dolostone
	dolomitic composition
	dolomitic limestone

Dolores County Colorado
BT	United States
	.Colorado
	..Dolores County Colorado

dolostone
BT	sedimentary rocks
	.carbonate rocks
	..dolostone
UF	dolomitite
RT	dolomite
	dolomitization
	carbonate sediments
	dolomitic composition
	dolomitic limestone
	dolostone deposits
SN	To be used for rocks made of dolomite (mineral). As of 1981, use dolostone deposits for dolostone as a commodity. For sediments, use carbonate sediments; dolomitic composition. Before 1976, also search dolomite for the rock, sediment and commodity.

dolostone deposits
RT	dolomitic composition
	dolostone
	limestone deposits
	marble deposits
SN	Commodity. See List C.

domain structure
SN	As of 1981, no longer a valid term for GeoRef. See magnetic domains or crystal structure.

domains
RT	facies
	magnetic domains
	sedimentary petrology
SN	Used as a general term.

Domerian
BT	Chronostratigraphic Units
	.Phanerozoic
	..Mesozoic
	...Jurassic
	....Lower Jurassic
	.....middle Liassic
	......Domerian
SN	Europe.

domes
RT	anticlines
	arches
	batholiths
	diapirs
	folds
	geomorphology
	intrusions
	laccoliths
	morphostructures
	resurgence
	salt domes
	swells
	uplifts
	volcanoes
SN	Indexed with folds as applicable.

Dominica
BT	Caribbean region
	.West Indies
	..Antilles
	...Lesser Antilles
	....Dominica
SN	Island between Guadeloupe and Martinique in the Lesser Antilles. Added to Thesaurus in 1981.

Dominican Republic
BT	spaniola
	.Dominican Republic
NT	Santo Domingo Dominican Republic
RT	Central Cordillera
SN	Occupies eastern two thirds of island of Hispaniola in the Greater Antilles.

Don Basin
RT	Don River
	Russian Federation
SN	River basin in central S and S Russian Federation. Before 1978, also search Don. May also occur in other locations. Indexed with countries as applicable.

Don Juan Pond
BT	Antarctica
	.Don Juan Pond
RT	Victoria Land
	Wright Valley
SN	In Wright Valley on W shore of Ross Sea near Ross Ice Sheet in N Victoria Land.

Don River
RT	Don Basin
	Rostov-na-Donu Russian Federation
	Russian Federation
SN	Rises SE of Tula and flows SE into a big bend near the Volga River then flows SW into the Azov Sea at Rostov. Before 1978, also search Don. Also in other locations. Search in combination with Russian Federation. Indexed with country as applicable.

Dona Ana County New Mexico
BT	United States
	.New Mexico
	..Dona Ana County New Mexico
NT	Kilbourne Hole
	Las Cruces New Mexico
RT	Hueco Bolson
	Jornada del Muerto
	Orogrande Basin
	San Andres Mountains
	White Sands
SN	SW New Mexico.

Donau River
USE	Danube River

Donbas
USE	Donets Basin

Donbass
USE	Donets Basin

Donegal Ireland
BT	Europe
	.Western Europe
	..Ireland
	...Donegal Ireland
NT	Ardara Pluton
	Rosses Granite
RT	Ballachulish Complex
SN	County W of Northern Ireland in N Ireland.

Donets Basin
BT	Europe
	.Donets Basin
BT	Commonwealth of Independent States
	.Donets Basin
UF	Donbas
	Donbass
RT	Russian Federation
	Ukraine
	Dnieper-Donets Basin
	Gorlovka Basin
	Novorayskoe Formation
	Protopivskaya Formation
SN	Industrial region in plain of Donets River primarily in E Ukraine. Also search Donets. This term has multiple hierarchies. Indexed with former Soviet republics as applicable.

Dong Hai
USE	East China Sea

Dongpu Depression
BT	Asia
	.Far East
	..China
	...Dongpu Depression
RT	Shandong China
	Henan China
	Bohai Bay
SN	Subbasin of the Bohai Basin located in NE Henan and SW Shandong. Added to Thesaurus in 1989.

Doniphan County Kansas
BT	United States
	.Kansas
	..Doniphan County Kansas
SN	Extreme NE Kansas.

Donjek Glacier
BT	Canada
	.Western Canada
	..Yukon Territory
	...Donjek Glacier
SN	In SW Yukon Territory.

Donjek River
BT	Canada
	.Western Canada
	..Yukon Territory
	...Donjek River
SN	In SW Yukon Territory.

Donley County Texas
BT	United States
	.Texas
	..Donley County Texas

Dooly County Georgia
BT	United States
	.Georgia
	..Dooly County Georgia

Door County Wisconsin
BT	United States
	.Wisconsin
	..Door County Wisconsin
SN	NE Wisconsin, on Door Peninsula.

Door Peninsula
BT	United States
	.Wisconsin
	..Door Peninsula
SN	E Wisconsin, between Green Bay and Lake Michigan. Includes Door and Kewaunee counties, and parts of Brown and Manitowoc counties. Indexed with counties as applicable.

Doornik Belgium
USE	Tournai Belgium

Dopp

Doppler effect
UF	Doppler shift
RT	acoustical methods
	geophysical methods
	remote sensing
	seismic methods
	geodesy
	satellite methods
	electromagnetic waves
	radar methods
	gravity methods
	frequency
	laser methods
	navigation
	wavelength
SN	Also index specific geophysical methods such as laser methods.

Doppler shift
USE	Doppler effect

Dora Maira Massif
BT	Europe
	.Southern Europe
	..Italy
	...Piemonte Italy
	....Dora Maira Massif
BT	Europe
	.Western Europe
	..Cottian Alps
	...Dora Maira Massif
BT	Europe
	.Alps
	..Piedmont Alps
	...Dora Maira Massif
SN	Cottian Alps, W of Turin, NW Italy. This term has multiple hierarchies.

Dorchester County Maryland
BT	United States
	.Maryland
	..Dorchester County Maryland
SN	E Maryland.

Dorchester County Quebec
BT	Canada
	.Eastern Canada
	..Quebec
	...Dorchester County Quebec
SN	S Quebec. Before 1978, also search Dorchester and Quebec.

Dorchester County South Carolina
BT	United States
	.South Carolina
	..Dorchester County South Carolina
SN	SE central South Carolina.

Dordogne France
BT	Europe
	.Western Europe
	..France
	...Dordogne France
NT	Les Eyzies region
	Perigord

Dore Lake Complex
BT	Canada
	.Eastern Canada
	..Quebec
	...Dore Lake Complex
RT	Precambrian

Dorog Basin
BT	ngary
	.Dorog Basin

Dorog Hungary
BT	ngary
	.Dorog Hungary
SN	Town NW of Budapest in N Hungary.

Dorpat Estonia
USE	Tartu Estonia

Dorset England
BT	Europe
	.Western Europe
	..United Kingdom
	...Great Britain
	....England
	.....Dorset England
NT	Chesil Beach England
UF	Dorsetshire England
SN	County on the English Channel.

Dorsetshire England
USE	Dorset England

dosimetry
UF	radiation dosimetry
RT	spectroscopy
	chemical analysis
	instruments
	measurement
	well-logging
	geophysical methods
	radioactivity
	background radiation
	electromagnetic radiation
	radon emanometry
	infrared spectra
	radioactivity methods
	ultraviolet spectra
	X-ray spectra
SN	Restricted to radioactivity applications. Added to Thesaurus in 1995.

double refraction
USE	birefringence

double-refracting spar
USE	Iceland spar

Doubs France
BT	Europe
	.Western Europe
	..France
	...Doubs France
NT	Besancon France
RT	Jura Mountains
	Franche-Comte
SN	Department in E France.

Dougherty County Georgia
BT	United States
	.Georgia
	..Dougherty County Georgia

Douglas County Colorado
BT	United States
	.Colorado
	..Douglas County Colorado
SN	Central Colorado.

Douglas County Georgia
BT	United States
	.Georgia
	..Douglas County Georgia
SN	NW central Georgia.

Douglas County Illinois
BT	United States
	.Illinois
	..Douglas County Illinois
SN	E central Illinois.

Douglas County Kansas
BT	United States
	.Kansas
	..Douglas County Kansas
SN	E Kansas.

Douglas County Minnesota
BT	United States
	.Minnesota
	..Douglas County Minnesota
SN	W Minnesota.

Douglas County Missouri
BT	United States
	.Missouri
	..Douglas County Missouri
SN	S Missouri.

Douglas County Nebraska
BT	United States
	.Nebraska
	..Douglas County Nebraska
SN	E Nebraska.

Douglas County Nevada
BT	United States
	.Nevada
	..Douglas County Nevada
RT	Carson River
	Lake Tahoe
SN	W Nevada.

Douglas County Oregon
BT	United States
	.Oregon
	..Douglas County Oregon
NT	Riddle Oregon
SN	SW Oregon.

Douglas County South Dakota
BT	United States
	.South Dakota
	..Douglas County South Dakota
SN	SE South Dakota.

Douglas County Washington
BT	United States
	.Washington
	..Douglas County Washington
SN	Central Washington.

Douglas County Wisconsin
BT	United States
	.Wisconsin
	..Douglas County Wisconsin
SN	Extreme NW Wisconsin.

Douglas Group
BT	Chronostratigraphic Units
	.Phanerozoic
	..Paleozoic
	...Carboniferous
	....Pennsylvanian
	.....Upper Pennsylvanian
	......Virgilian
	.......Douglas Group
RT	Iowa
	Missouri
	Nebraska
	Kansas
	Lawrence Formation
SN	Includes Stranger Formation, and Lawrence Formation. SW Iowa, E Kansas, NW Missouri, and SE Nebraska.

Douro River
USE	Duero River

Doushantuo Formation
BT	Chronostratigraphic Units
	.Precambrian
	..Proterozoic
	...Sinian
	....Doushantuo Formation
RT	China
	Hubei China
SN	Hubei, South-Central China. Added to Thesaurus in 1989.

down hole
USE	downhole methods

down-hole methods
USE	downhole methods

downhole methods
UF	down hole
	down-hole methods
RT	well-logging
	methods
	boreholes
	Formation MicroScanner
	geothermal energy
	geochemical logging
	measurement-while-drilling
SN	Added to Thesaurus in 1985.

Downtonian
BT	Chronostratigraphic Units
	.Phanerozoic
	..Paleozoic
	...Downtonian
RT	Silurian
	Devonian
	Lower Devonian
	Upper Silurian
	Old Red Sandstone
SN	In Old Red Sandstone, England. Uppermost Silurian or lowermost Devonian; Schmidt, l960--lowermost Gedinnian (Lower Devonian).

downwelling
UF	sinking (currents)
RT	oceanography
	convection
	ocean circulation
	subduction
	upwelling
	ocean currents
	subsidence
SN	For convection/thermal subsidence also use subsidence if applicable. Added to Thesaurus in 1998.

Drac Valley
BT	Europe
	.Western Europe
	..France
	...Drac Valley
SN	River valley in SE France.

drag folds
BT	folds
	.drag folds
RT	faults
	orientation
	displacements
SN	Before 1978, also search drag AND folds.

drainage
RT	acid mine drainage
	culverts
	drainage basins
	drainage patterns
	DRAINMOD
	dredging
	geomembranes
	geotextiles
	ground water
	imbibition
	lakes
	lysimeters
	mine dewatering
	mine drainage
	seepage
	soils
	trenching
	underground channels
	water
	water regimes

drainage basins
UF	basins, drainage
	catchments
	feeding ground
RT	drainage
	geomorphology
	fluvial features
	atmospheric precipitation
	rivers
	rivers and streams
	basins
	basin management
	valleys
	catchment hydrodynamics
	water balance
	drainage patterns
	poljes
	representative basins
	tributaries
	water yield
	watersheds
SN	Before 1993, also search river basins if applicable. Indexed with fluvial features for geomorphologic studies.

drainage changes
SN	A valid term through 1974. After 1974, see landform evolution and fluvial features.

drainage divides
SN	Not a valid term for GeoRef. See watersheds or drainage basins (catchments).

drainage networks
USE	drainage patterns

drainage patterns
UF	drainage networks
RT	glacial geology
	drainage
	geomorphology
	fluvial features
	segmentation
	drainage basins
	rivers
	streams
	patterns
	tributaries
	stream order
	trees
SN	Indexed with fluvial features as applicable.

DRAINMOD
RT	drainage
	hydrologic cycle
	hydrology
	infiltration
	models
	runoff
	simulation
	unsaturated zone
	water table
SN	Water management simulation model.

Drake Passage
UF	Drake Strait
RT	South Atlantic
	Antarctic Ocean
	Southeast Pacific
	DSDP Site 326
	Leg 36
	Scotia Sea
SN	Strait between Cape Horn and South Shetland Islands N of Antarctica. Indexed with ocean areas as applicable.

Drake Strait
USE	Drake Passage

Drammen Norway
BT	Europe
	.Western Europe
	..Scandinavia
	...Norway
	....Drammen Norway
SN	City on a branch of Oslo Fjord in S Norway.

drape folding
USE	drape folds

drape folds
BT	folds
	.drape folds
UF	drape folding

DRASTIC
RT	aquifer vulnerability
	ground water
	mathematical methods
	pollution
	risk assessment
SN	Acronym. Major factors in ground water pollution methodology for pollution potential comparisons in the United States. Added to Thesaurus in 1995.

dravite
BT	silicates
	.ring silicates
	..dravite
RT	borosilicates
	schorl
	tourmaline

drawdown
RT	ground water
	hydraulics
	levels
	low water
	mine dewatering
	potentiometric surface
	pumping
	reservoirs
	slug tests
	water use
	water wells

dredge spoils
SN	Not a valid term for GeoRef. After 1993, see dredged materials.

dredged materials
RT	dredged samples
	dredging
	mining
	spoils
	tailings
	waste disposal
SN	Before 1993, also search dredge spoils if applicable. Added to Thesaurus in 1993.

dredged samples
RT	dredged materials
	dredging
	samples
	sampling
SN	Added to Thesaurus in 1985.

dredging
UF	deepening
RT	mining geology
	ocean floors
	engineering geology
	drainage
	waterways
	construction
	excavations
	tailings
	mining
	siltation
	trenching
	dredged materials
	dredged samples
	spoils

Dresbachian
BT	Chronostratigraphic Units
	.Phanerozoic
	..Paleozoic
	...Cambrian
	....Upper Cambrian
	.....Dresbachian
SN	North America. Upper Cambrian, above Albertan and below Franconian. Added to Thesaurus in 1985.

Dresden Bezirk
SN	No longer a valid term for GeoRef. District in SE East Germany. Before 1981, search Dresden. See Saxony Germany and Upper Lusatia.

Dresden Germany
BT	Europe
	.Central Europe
	..Germany
	...Saxony Germany
	....Dresden Germany
SN	City in Saxony, E Germany. As of 1981, Dresden refers to only the city. Before 1981, it also included the East German district.

Drew County Arkansas
BT	United States
	.Arkansas
	..Drew County Arkansas

drift
BT	sediments
	.clastic sediments
	..drift
UF	drift deposits
	glacial drift
RT	glacial geology
	fluvial features
	terrigenous materials
	till
	glacial features
	buried channels
	buried valleys
	loess
	glacial transport
	glaciofluvial sedimentation
	moraines
SN	Before 1971, also search glacial deposits.

drift deposits
USE	drift

drill cores
USE	cores

drill cuttings
USE	cuttings

drill holes
USE	boreholes

drill stem tests
UF	drill-stem tests
	drillstem tests
	DST (drill stem tests)
RT	petroleum engineering
	formation evaluation
	testing
SN	Involve temporary completion of a well to project its productivity. Abbreviated DST. Also search formation testing if applicable.

drill-stem tests
USE	drill stem tests

drilling
NT	deep drilling
	horizontal drilling
	marine drilling
RT	blowouts
	borehole breakouts
	boreholes
	Continental Scientific Drilling Program
	drilling muds
	engineering geology
	measurement-while-drilling
	petroleum
	petroleum engineering
	sand equivalent tests
	sludge
	trenching
	well-logging
SN	Used for the process.

drilling fluids
USE	drilling muds

drilling muds
UF	drilling fluids
RT	petroleum engineering
	well-logging
	clay
	drilling
	borehole breakouts
	boreholes
	mud
SN	Before 1998, also search drilling and mud.

drillstem tests
USE	drill stem tests

drinking water
RT	bottling
	decontamination
	desalinization
	fresh water
	ground water
	impurities
	potability
	purification
	Safe Drinking Water Act
	surface water
	water
	water quality
	water resources
	water supply
	wellhead protection
SN	Added to Thesaurus in 1983.

Drome France
BT	Europe
	.Western Europe
	..France
	...Drome France
NT	Baronnies
	Diois
	Valence France
RT	Vercors
SN	Department in SE France.

Dronning Maud Land
USE	Queen Maud Land

droplets
RT	clouds
	meteorology
	raindrops
	water

dropstone
USE	argillite

drought
RT	atmospheric precipitation
	climate
	environmental geology
	hydrology
	rainfall
	water balance
	water resources
	water supply
SN	Added to Thesaurus in 1982.

Drum Mountains
BT	United States
	.Utah
	..Drum Mountains
RT	Millard County Utah
	Juab County Utah
SN	W central Utah. Indexed with counties and mountains as applicable. Added to Thesaurus in 1985.

Drumheller Alberta
BT	Canada
	.Western Canada
	..Alberta
	...Drumheller Alberta
SN	City in S Alberta.

Drumian
BT	Chronostratigraphic Units
	.Phanerozoic
	..Paleozoic
	...Cambrian
	....Series 3
	.....Drumian

drumlins
BT	glacial features
	.drumlins
RT	glacial geology
	till
	moraines

Drummond County Quebec
BT	Canada
	.Eastern Canada
	..Quebec
	...Drummond County Quebec

Dry Branch Formation
BT	Chronostratigraphic Units
	.Phanerozoic
	..Cenozoic
	...Paleogene
	....Eocene
	.....upper Eocene
	......Dry Branch Formation
RT	South Carolina
	Georgia
	DSDP Site 603
	Twiggs Clay
SN	Includes Twiggs Clay and Griffins Landing Member. Added to Thesaurus in 1989.

dry delta
USE	alluvial fans

dry hot rocks
USE	hot dry rocks

Dry Tortugas
BT	United States
	.Florida
	..Monroe County Florida
	...Dry Tortugas
RT	Gulf of Mexico
SN	Island group at W end of Florida Keys. Added to Thesaurus in 1985.

Dry Valley Drilling Project
BT	Antarctica
	.Dry Valley Drilling Project
UF	DVDP
RT	programs
SN	In different locations such as Lake Vanda, Lake Vida, New Harbor, Ross Island, and McMurdo Sound off SW Ross Ice Sheet in the Victoria Land area of Ross Dependency.

dry valleys
RT	erosion features
	fluvial features
	geomorphology
	valleys
SN	Streamless valleys. Added to Thesaurus in 1989.

Dryas
BT	Plantae
	.Spermatophyta
	..Angiospermae
	...Dicotyledoneae
	....Dryas
RT	palynomorphs
	miospores
	Older Dryas
	Oldest Dryas
	Younger Dryas
SN	Genus. Before 1978, term also included use for the intervals of late-glacial time.

drying
USE	dehydration

drynian
NT	Fourchu Group
	George River Group

Dryopithecus
BT	Chordata
	.Vertebrata
	..Tetrapoda
	...Mammalia
	....Theria
	.....Eutheria
	......Primates
	.......simians
	........Pongidae
	.........Dryopithecus
RT	Proconsul
	Sivapithecus
SN	Species.

DS

DSDP
USE	Deep Sea Drilling Project

DSDP Sit

DSDP Site

DSDP Site 1
BT	Deep Sea Drilling Project
	.Leg 1
	..DSDP Site 1
RT	Gulf of Mexico
SN	Sigsbee abyssal plain, Gulf of Mexico.

DSDP Site 10
BT	Deep Sea Drilling Project
	.Leg 2
	..DSDP Site 10
RT	North Atlantic
	Mid-Atlantic Ridge
	Sargasso Sea
SN	Lower flank, Mid-Atlantic Ridge, Sargasso Sea area, N Atlantic.

DSDP Site 100
BT	Deep Sea Drilling Project
	.Leg 11
	..DSDP Site 100
RT	Blake-Bahama Outer Ridge
SN	Blake-Bahama Outer Ridge, NW Atlantic. Added to Thesaurus in 1993.

DSDP Site 102
BT	Deep Sea Drilling Project
	.Leg 11
	..DSDP Site 102
RT	Blake-Bahama Outer Ridge
SN	Blake-Bahama Outer Ridge, NW Atlantic. Added to Thesaurus in 1993.

DSDP Site 103
BT	Deep Sea Drilling Project
	.Leg 11
	..DSDP Site 103
RT	Blake-Bahama Outer Ridge
SN	Blake-Bahama Outer Ridge, NW Atlantic. Added to Thesaurus in 1993.

DSDP Site 104
BT	Deep Sea Drilling Project
	.Leg 11
	..DSDP Site 104
RT	Blake-Bahama Outer Ridge
SN	Blake-Bahama Outer Ridge, NW Atlantic. Added to Thesaurus in 1993.

DSDP Site 105
BT	Deep Sea Drilling Project
	.Leg 11
	..DSDP Site 105
RT	North Atlantic
SN	NW Atlantic Ocean. Added to Thesaurus in 1981.

DSDP Site 108
BT	Deep Sea Drilling Project
	.Leg 11
	..DSDP Site 108
RT	North Atlantic
SN	Continental slope off New Jersey, NW Atlantic. Added to Thesaurus in 1993.

DSDP Site 11
BT	Deep Sea Drilling Project
	.Leg 2
	..DSDP Site 11
RT	North Atlantic
	Mid-Atlantic Ridge
SN	Upper flank of Mid-Atlantic Ridge, E of Sargasso Sea, N Atlantic.

DSDP Site 111
BT	Deep Sea Drilling Project
	.Leg 12
	..DSDP Site 111
RT	North Atlantic
SN	Orphan Knoll, NE of Newfoundland, NW Atlantic. Added to Thesaurus in 1993.

DSDP Site 112
BT	Deep Sea Drilling Project
	.Leg 12
	..DSDP Site 112
RT	Labrador Sea
SN	Central Labrador Sea, NW Atlantic Ocean. Added to Thesaurus in 1995.

DSDP Site 113
BT	Deep Sea Drilling Project
	.Leg 12
	..DSDP Site 113
RT	Labrador Sea
SN	Axis of Labrador Sea, SW of Greenland.

DSDP Site 114
BT	Deep Sea Drilling Project
	.Leg 12
	..DSDP Site 114
RT	Reykjanes Ridge
SN	E flank of Reykjanes Ridge, SW of Iceland.

DSDP Site 115
BT	Deep Sea Drilling Project
	.Leg 12
	..DSDP Site 115
RT	North Atlantic
SN	Basin E of Reykjanes Ridge, S of Iceland.

DSDP Site 116
BT	Deep Sea Drilling Project
	.Leg 12
	..DSDP Site 116
RT	Rockall Plateau
SN	Rockall Plateau, NE Atlantic. Added to Thesaurus in 1989.

DSDP Site 117
BT	Deep Sea Drilling Project
	.Leg 12
	..DSDP Site 117
RT	Rockall Plateau
	Rockall Bank
SN	W Rockall Bank, near margin of Hatton-Rockall Basin, NE Atlantic. Added to Thesaurus in 1993.

DSDP Site 118
BT	Deep Sea Drilling Project
	.Leg 12
	..DSDP Site 118
RT	North Atlantic
	Bay of Biscay
SN	W Biscay abyssal plain, NE Atlantic.

DSDP Site 119
BT	Deep Sea Drilling Project
	.Leg 12
	..DSDP Site 119
RT	Cantabria Seamount
SN	Cantabria Seamount, W Bay of Biscay, off the N coast of Spain. Added to Thesaurus in 1989.

DSDP Site 12
BT	Deep Sea Drilling Project
	.Leg 2
	..DSDP Site 12
RT	Cape Verde Basin
SN	Central Cape Verde Basin, NE Atlantic.

DSDP Site 120
BT	Deep Sea Drilling Project
	.Leg 13
	..DSDP Site 120
RT	North Atlantic
	Gorringe Bank
SN	NE Atlantic, near Strait of Gibraltar. Added to Thesaurus in 1985.

DSDP Site 121
BT	Deep Sea Drilling Project
	.Leg 13
	..DSDP Site 121
RT	Alboran Sea
	West Mediterranean
SN	W Mediterranean Sea. Added to Thesaurus in 1985.

DSDP Site 122
BT	Deep Sea Drilling Project
	.Leg 13
	..DSDP Site 122
RT	West Mediterranean
	Valencia Trough
SN	W Mediterranean Sea. Added to Thesaurus in 1985.

DSDP Site 123
BT	Deep Sea Drilling Project
	.Leg 13
	..DSDP Site 123
RT	West Mediterranean
SN	W Mediterranean Sea. Added to Thesaurus in 1985.

DSDP Site 124
BT	Deep Sea Drilling Project
	.Leg 13
	..DSDP Site 124
RT	West Mediterranean
	Balearic Basin
SN	W Mediterranean Sea. Added to Thesaurus in 1985.

DSDP Site 125
BT	Deep Sea Drilling Project
	.Leg 13
	..DSDP Site 125
RT	East Mediterranean
SN	E Mediterranean Sea. Added to Thesaurus in 1981.

DSDP Site 126
BT	Deep Sea Drilling Project
	.Leg 13
	..DSDP Site 126
RT	East Mediterranean
	DSDP Site 377
SN	SE Mediterranean Sea. Added to Thesaurus in 1985.

DSDP Site 127
BT	Deep Sea Drilling Project
	.Leg 13
	..DSDP Site 127
RT	East Mediterranean
	Hellenic Trench
SN	E Mediterranean Sea. Added to Thesaurus in 1985.

DSDP Site 128
BT	Deep Sea Drilling Project
	.Leg 13
	..DSDP Site 128
RT	East Mediterranean
SN	E Mediterranean Sea. Added to Thesaurus in 1985.

DSDP Site 129
BT	Deep Sea Drilling Project
	.Leg 13
	..DSDP Site 129
RT	East Mediterranean
	Strabo Trench
SN	E Mediterranean Sea. Added to Thesaurus in 1985.

DSDP Site 13
BT	Deep Sea Drilling Project
	.Leg 3
	..DSDP Site 13
RT	Sierra Leone Rise
SN	Sierra Leone Rise, NE Equatorial Atlantic.

DSDP Site 130
BT	Deep Sea Drilling Project
	.Leg 13
	..DSDP Site 130
RT	East Mediterranean
SN	Levantine Basin, SE Mediterranean Sea. Added to Thesaurus in 1985.

DSDP Site 131
BT	Deep Sea Drilling Project
	.Leg 13
	..DSDP Site 131
RT	East Mediterranean
	Nile Delta
SN	Nile cone region, Mediterranean Sea. Added to Thesaurus in 1989.

DSDP Site 132
BT	Deep Sea Drilling Project
	.Leg 13
	..DSDP Site 132
RT	Tyrrhenian Sea
	ODP Site 653
	Tyrrhenian Basin
SN	Tyrrhenian Basin, Mediterranean Sea. Added to Thesaurus in 1981.

DSDP Site 133
BT	Deep Sea Drilling Project
	.Leg 13
	..DSDP Site 133
RT	West Mediterranean
	Balearic Basin
SN	W Mediterranean Sea. Added to Thesaurus in 1985.

DSDP Site 134
BT	Deep Sea Drilling Project
	.Leg 13
	..DSDP Site 134
RT	West Mediterranean
	Balearic Basin
SN	W Mediterranean Sea. Added to Thesaurus in 1985.

DSDP Site 135
BT	Deep Sea Drilling Project
	.Leg 14
	..DSDP Site 135
RT	North Atlantic
SN	SE of Horseshoe Plain, NE Atlantic. Added to Thesaurus in 1995.

DSDP Site 136
BT	Deep Sea Drilling Project
	.Leg 14
	..DSDP Site 136
RT	North Atlantic
SN	Abyssal hills, NE Atlantic.

DSDP Site 137
BT	Deep Sea Drilling Project
	.Leg 14
	..DSDP Site 137
RT	Cape Verde Basin
SN	Abyssal hills in Cape Verde Basin, NE Atlantic, near the foot of the continental rise about 1000 km W of Cap Blanc, W Africa. Added to Thesaurus in 1989.

DSDP Site 138
BT	Deep Sea Drilling Project
	.Leg 14
	..DSDP Site 138
RT	Cape Verde Basin
SN	Abyssal hills in Cape Verde Basin, NE Atlantic.

DSDP Site 139
BT	Deep Sea Drilling Project
	.Leg 14
	..DSDP Site 139
RT	Cape Verde Basin
SN	Mid-continental rise W of Cap Blanc, Cape Verde Basin, NE Atlantic.

DSDP Site 14
BT	Deep Sea Drilling Project
	.Leg 3
	..DSDP Site 14
RT	South Atlantic
	Mid-Atlantic Ridge
SN	W flank of S Mid-Atlantic Ridge.

DSDP Site 140
BT	Deep Sea Drilling Project
	.Leg 14
	..DSDP Site 140
RT	Cape Verde Basin
SN	Foot of continental rise, about 450 km W of Cap Blanc, Cape Verde Basin, NE Atlantic.

DSDP Site 141
BT	Deep Sea Drilling Project
	.Leg 14
	..DSDP Site 141
RT	North Atlantic
SN	Lower continental rise, about 200 km N of Cape Verde Islands in NE Atlantic. Added to Thesaurus in 1989.

DSDP Site 142
BT	Deep Sea Drilling Project
	.Leg 14
	..DSDP Site 142
RT	North Atlantic
	Equatorial Atlantic
SN	Ceara abyssal plain, about 700 km NE of the Amazon Delta, NW Equatorial Atlantic.

DSDP Site 143
BT	Deep Sea Drilling Project
	.Leg 14
	..DSDP Site 143
RT	North Atlantic
	Equatorial Atlantic
SN	About 400 km N of Surinam, N flank of Demerara Rise, NW Equatorial Atlantic.

DSDP Site 144
BT	Deep Sea Drilling Project
	.Leg 14
	..DSDP Site 144
RT	North Atlantic
	Equatorial Atlantic
SN	About 400 km N of Surinam, N flank of Demerara Rise, NW Equatorial Atlantic.

DSDP Site 146
BT	Deep Sea Drilling Project
	.Leg 15
	..DSDP Site 146
RT	Caribbean Sea
SN	E Caribbean Sea. Added to Thesaurus in 1985.

DSDP Site 147
BT	Deep Sea Drilling Project
	.Leg 15
	..DSDP Site 147
RT	Caribbean Sea
	ODP Site 1002
SN	E Caribbean Sea. Added to Thesaurus in 1985.

DSDP Site 148
BT	Deep Sea Drilling Project
	.Leg 15
	..DSDP Site 148
RT	Caribbean Sea
SN	E Caribbean Sea. Added to Thesaurus in 1985.

DSDP Site 149
BT	Deep Sea Drilling Project
	.Leg 15
	..DSDP Site 149
RT	Caribbean Sea
SN	E Caribbean Sea. Added to Thesaurus in 1985.

DSDP Site 15
BT	Deep Sea Drilling Project
	.Leg 3
	..DSDP Site 15
RT	South Atlantic
	Mid-Atlantic Ridge
SN	W flank of S Mid-Atlantic Ridge.

DSDP Site 150
BT	Deep Sea Drilling Project
	.Leg 15
	..DSDP Site 150
RT	Caribbean Sea
SN	E Caribbean Sea. Added to Thesaurus in 1985.

DSDP Site 151
BT	Deep Sea Drilling Project
	.Leg 15
	..DSDP Site 151
RT	Caribbean Sea
SN	Central Caribbean Sea. Added to Thesaurus in 1985.

DSDP Site 152
BT	Deep Sea Drilling Project
	.Leg 15
	..DSDP Site 152
RT	Caribbean Sea
SN	Central Caribbean Sea. Added to Thesaurus in 1985.

DSDP Site 153
BT	Deep Sea Drilling Project
	.Leg 15
	..DSDP Site 153
RT	Caribbean Sea
SN	E Caribbean Sea. Added to Thesaurus in 1985.

DSDP Site 154
BT	Deep Sea Drilling Project
	.Leg 15
	..DSDP Site 154
RT	Caribbean Sea
SN	W Caribbean Sea. Added to Thesaurus in 1985.

DSDP Site 155
BT	Deep Sea Drilling Project
	.Leg 16
	..DSDP Site 155
RT	Northeast Pacific
	Equatorial Pacific
SN	Coiba Ridge, off W Panama, E Equatorial Pacific.

DSDP Site 156
BT	Deep Sea Drilling Project
	.Leg 16
	..DSDP Site 156
RT	Carnegie Ridge
SN	Carnegie Ridge, off W Ecuador, E Equatorial Pacific.

DSDP Site 157
BT	Deep Sea Drilling Project
	.Leg 16
	..DSDP Site 157
RT	Southeast Pacific
	Equatorial Pacific
SN	E Equatorial Pacific. Added to Thesaurus in 1981.

DSDP Site 158
BT	Deep Sea Drilling Project
	.Leg 16
	..DSDP Site 158
RT	Northeast Pacific
	Equatorial Pacific
SN	E Equatorial Pacific. Added to Thesaurus in 1981.

DSDP Site 159
BT	Deep Sea Drilling Project
	.Leg 16
	..DSDP Site 159
RT	Northeast Pacific
	Equatorial Pacific
	East Pacific Rise
SN	East Pacific Rise, E Equatorial Pacific. Added to Thesaurus in 1989.

DSDP Site 16
BT	Deep Sea Drilling Project
	.Leg 3
	..DSDP Site 16
RT	South Atlantic
	Mid-Atlantic Ridge
SN	W flank of S Mid-Atlantic Ridge.

DSDP Site 160
BT	Deep Sea Drilling Project
	.Leg 16
	..DSDP Site 160
RT	Northeast Pacific
	Equatorial Pacific
	East Pacific Rise
SN	East Pacific Rise, E Equatorial Pacific. Added to Thesaurus in 1995.

DSDP Site 161
BT	Deep Sea Drilling Project
	.Leg 16
	..DSDP Site 161
RT	Northeast Pacific
	Equatorial Pacific
SN	N of Clipperton fracture zone and S of Clarion fracture zone, E Equatorial Pacific.

DSDP Site 162
BT	Deep Sea Drilling Project
	.Leg 16
	..DSDP Site 162
RT	Northeast Pacific
	Equatorial Pacific
	East Pacific Rise
SN	East Pacific Rise, E Equatorial Pacific. Added to Thesaurus in 1995.

DSDP Site 163
BT	Deep Sea Drilling Project
	.Leg 16
	..DSDP Site 163
RT	Northeast Pacific
	Equatorial Pacific
SN	E Equatorial Pacific. Added to Thesaurus in 1981.

DSDP Site 164
BT	Deep Sea Drilling Project
	.Leg 17
	..DSDP Site 164
RT	Northeast Pacific
	Equatorial Pacific
SN	N of extension of Clarion fracture zone, between Line Islands and Hawaii, NE Equatorial Pacific.

DSDP Site 165
BT	Deep Sea Drilling Project
	.Leg 17
	..DSDP Site 165
RT	Northeast Pacific
	Equatorial Pacific
SN	W of Line Islands, NE Equatorial Pacific.

DSDP Site 166
BT	Deep Sea Drilling Project
	.Leg 17
	..DSDP Site 166
RT	Northeast Pacific
	Equatorial Pacific
SN	SE of Magellan Rise about 400 km NE of Howland Island, in central Equatorial Pacific.

DSDP Site 167
BT	Deep Sea Drilling Project
	.Leg 17
	..DSDP Site 167
RT	Northeast Pacific
	Equatorial Pacific
SN	On Magellan Rise in central Equatorial Pacific. Added to Thesaurus in 1981.

DSDP Site 168
BT	Deep Sea Drilling Project
	.Leg 17
	..DSDP Site 168
RT	Northwest Pacific
	Equatorial Pacific
	Central Pacific
SN	W edge of Central Pacific Basin, E of the Marshall Islands, NW Pacific.

DSDP Site 169
BT	Deep Sea Drilling Project
	.Leg 17
	..DSDP Site 169
RT	Northwest Pacific
	Equatorial Pacific
SN	W edge of Central Pacific Basin, E of the Marshall Islands, NW Pacific.

DSDP Site 17
BT	Deep Sea Drilling Project
	.Leg 3
	..DSDP Site 17
RT	South Atlantic
	Mid-Atlantic Ridge
SN	Flank of S Mid-Atlantic Ridge.

DSDP Site 170
BT	Deep Sea Drilling Project
	.Leg 17
	..DSDP Site 170
RT	Northwest Pacific
	Equatorial Pacific
SN	NW Central Pacific Basin, E of the Marshall Islands, NW Pacific.

DSDP Site 171
BT	Deep Sea Drilling Project
	.Leg 17
	..DSDP Site 171
RT	Northeast Pacific
SN	Horizon Seamount, NE Pacific. Added to Thesaurus in 1993.

DSDP Site 172
BT	Deep Sea Drilling Project
	.Leg 18
	..DSDP Site 172
RT	Northeast Pacific
SN	NE Pacific. Added to Thesaurus in 1985.

DSDP Site 173
BT	Deep Sea Drilling Project
	.Leg 18
	..DSDP Site 173
RT	Northeast Pacific
SN	NE Pacific. Added to Thesaurus in 1985.

DSDP Site 174
BT	Deep Sea Drilling Project
	.Leg 18
	..DSDP Site 174
RT	Northeast Pacific
SN	NE Pacific. Added to Thesaurus in 1985.

DSDP Site 175
BT	Deep Sea Drilling Project
	.Leg 18
	..DSDP Site 175
RT	Northeast Pacific
SN	NE Pacific. Added to Thesaurus in 1985.

DSDP Site 176
BT	Deep Sea Drilling Project
	.Leg 18
	..DSDP Site 176
RT	Northeast Pacific
SN	NE Pacific. Added to Thesaurus in 1985.

DSDP Site 177
BT	Deep Sea Drilling Project
	.Leg 18
	..DSDP Site 177
RT	Northeast Pacific
SN	NE Pacific. Added to Thesaurus in 1985.

DSDP Site 178
BT	Deep Sea Drilling Project
	.Leg 18
	..DSDP Site 178
RT	Gulf of Alaska
SN	Gulf of Alaska. Added to Thesaurus in 1985.

DSDP Site 179
BT	Deep Sea Drilling Project
	.Leg 18
	..DSDP Site 179
RT	Gulf of Alaska
SN	Gulf of Alaska. Added to Thesaurus in 1985.

DSDP Site 18
BT	Deep Sea Drilling Project
	.Leg 3
	..DSDP Site 18
RT	South Atlantic
	Mid-Atlantic Ridge
SN	Flank of S Mid-Atlantic Ridge.

DSDP Site 180
BT	Deep Sea Drilling Project
	.Leg 18
	..DSDP Site 180
RT	Gulf of Alaska
SN	Gulf of Alaska. Added to Thesaurus in 1985.

DSDP Site 181
BT	Deep Sea Drilling Project
	.Leg 18
	..DSDP Site 181
RT	Gulf of Alaska
SN	Gulf of Alaska. Added to Thesaurus in 1985.

DSDP Site 182
BT	Deep Sea Drilling Project
	.Leg 18
	..DSDP Site 182
RT	Gulf of Alaska
SN	Gulf of Alaska. Added to Thesaurus in 1985.

DSDP Site 183
BT	Deep Sea Drilling Project
	.Leg 19
	..DSDP Site 183
RT	Aleutian Trench
	Northwest Pacific
SN	Aleutian abyssal plain, W Pacific Ocean. Drilled to provide information on the geologic history of the Pacific and Kula plates and the formation of the Aleutian Trench. Added to Thesaurus in 1989.

DSDP Site 184
BT	Deep Sea Drilling Project
	.Leg 19
	..DSDP Site 184
RT	Bering Sea
SN	Umnak Plateau, E Bering Sea.

DSDP Site 185
BT	Deep Sea Drilling Project
	.Leg 19
	..DSDP Site 185
RT	Bering Sea
SN	Umnak Plateau, E Bering Sea.

DSDP Site 186
BT	Deep Sea Drilling Project
	.Leg 19
	..DSDP Site 186
RT	Aleutian Trench
	Northeast Pacific
SN	Aleutian Terrace-Aleutian Trench, NE Pacific. Added to Thesaurus in 1993.

DSDP Site 187
BT	Deep Sea Drilling Project
	.Leg 19
	..DSDP Site 187
RT	Aleutian Trench
	Bering Sea
SN	N wall of Aleutian Trench, S Bering Sea.

DSDP Site 188
BT	Deep Sea Drilling Project
	.Leg 19
	..DSDP Site 188
RT	Bowers Ridge
SN	Inner flank of Bowers Ridge, S central Bering Sea.

DSDP Site 189
BT	Deep Sea Drilling Project
	.Leg 19
	..DSDP Site 189
RT	Bering Sea
	Aleutian Ridge
SN	Near base of Aleutian Ridge, Komandorski Islands area, SW Bering Sea.

DSDP Site 19
BT	Deep Sea Drilling Project
	.Leg 3
	..DSDP Site 19
RT	Brazil Basin
SN	Ridge, S edge of Brazil Basin, SW Atlantic. Added to Thesaurus in 1993.

DSDP Site 190
BT	Deep Sea Drilling Project
	.Leg 19
	..DSDP Site 190
RT	Bering Sea
SN	W Aleutian Basin, E of Shirshov Ridge, W Bering Sea.

DSDP Site 191
BT	Deep Sea Drilling Project
	.Leg 19
	..DSDP Site 191
RT	Bering Sea
SN	Komandorski Basin, Bering Sea. Added to Thesaurus in 1995.

DSDP Site 192
BT	Deep Sea Drilling Project
	.Leg 19
	..DSDP Site 192
RT	Emperor Seamounts
SN	Northernmost seamount in the Emperor Seamounts, W Pacific. Added to Thesaurus in 1989.

DSDP Site 193
BT	Deep Sea Drilling Project
	.Leg 19
	..DSDP Site 193
RT	Northwest Pacific
SN	Hokkaido Rise, N Northwest Pacific Basin, E of Kamchatka.

DSDP Site 194
BT	Deep Sea Drilling Project
	.Leg 20
	..DSDP Site 194
RT	Northwest Pacific
SN	NW Pacific Ocean, off Japan. Added to Thesaurus in 1985.

DSDP Site 195
BT	Deep Sea Drilling Project
	.Leg 20
	..DSDP Site 195
RT	Northwest Pacific
SN	NW Pacific Ocean, off Japan. Added to Thesaurus in 1985.

DSDP Site 196
BT	Deep Sea Drilling Project
	.Leg 20
	..DSDP Site 196
RT	Northwest Pacific
SN	NW Pacific Ocean. Added to Thesaurus in 1985.

DSDP Site 197
BT	Deep Sea Drilling Project
	.Leg 20
	..DSDP Site 197
RT	Northwest Pacific
SN	NW Pacific Ocean. Added to Thesaurus in 1985.

DSDP Site 198
BT	Deep Sea Drilling Project
	.Leg 20
	..DSDP Site 198
RT	Northwest Pacific
SN	NW Pacific Ocean. Added to Thesaurus in 1985.

DSDP Site 199
BT	Deep Sea Drilling Project
	.Leg 20
	..DSDP Site 199
RT	Northwest Pacific
	Equatorial Pacific
SN	W Equatorial Pacific. Added to Thesaurus in 1985.

DSDP Site 2
BT	Deep Sea Drilling Project
	.Leg 1
	..DSDP Site 2
RT	Gulf of Mexico
SN	Sigsbee Knolls, central Gulf of Mexico. Added to Thesaurus in 1995.

DSDP Site 20
BT	Deep Sea Drilling Project
	.Leg 3
	..DSDP Site 20
RT	Brazil Basin
SN	Valley, S edge of Brazil Basin, SW Atlantic. Added to Thesaurus in 1993.

DSDP Site 200
BT	Deep Sea Drilling Project
	.Leg 20
	..DSDP Site 200
RT	Northwest Pacific
	Equatorial Pacific
SN	W Equatorial Pacific. Added to Thesaurus in 1985.

DSDP Site 202
BT	Deep Sea Drilling Project
	.Leg 20
	..DSDP Site 202
RT	Northwest Pacific
	Equatorial Pacific
SN	W Equatorial Pacific. Added to Thesaurus in 1985.

DSDP Site 203
BT	Deep Sea Drilling Project
	.Leg 21
	..DSDP Site 203
RT	Lau Basin
SN	Lau Basin, SSE of Fiji, SE Pacific.

DSDP Site 204
BT	Deep Sea Drilling Project
	.Leg 21
	..DSDP Site 204
RT	Southwest Pacific
SN	E of Tonga Trench, SW Pacific.

DSDP Site 205
BT	Deep Sea Drilling Project
	.Leg 21
	..DSDP Site 205
RT	Southwest Pacific
SN	South Fiji Basin, SW Pacific.

DSDP Site 206
BT	Deep Sea Drilling Project
	.Leg 21
	..DSDP Site 206
RT	Southwest Pacific
	New Caledonia Basin
SN	New Caledonia Basin, SW Pacific. Added to Thesaurus in 1989.

DSDP Site 207
BT	Deep Sea Drilling Project
	.Leg 21
	..DSDP Site 207
RT	Tasman Sea
	Lord Howe Rise
SN	S Lord Howe Rise, Tasman Sea, W Pacific. Added to Thesaurus in 1989.

DSDP Site 208
BT	Deep Sea Drilling Project
	.Leg 21
	..DSDP Site 208
RT	Lord Howe Rise
SN	N Lord Howe Rise, SW Pacific. Added to Thesaurus in 1989.

DSDP Site 209
BT	Deep Sea Drilling Project
	.Leg 21
	..DSDP Site 209
RT	Southwest Pacific
	Queensland Plateau
SN	Queensland Plateau, SW Pacific. Added to Thesaurus in 1993.

DSDP Site 21
BT	Deep Sea Drilling Project
	.Leg 3
	..DSDP Site 21
RT	Brazil Basin
SN	Brazil Basin, SW Atlantic. Added to Thesaurus in 1989.

DSDP Site 210
BT	Deep Sea Drilling Project
	.Leg 21
	..DSDP Site 210
RT	Coral Sea Basin
SN	Coral Sea Basin, SW Pacific. Added to Thesaurus in 1989.

DSDP Site 211
BT	Deep Sea Drilling Project
	.Leg 22
	..DSDP Site 211
RT	Indian Ocean
SN	About 130 nautical miles S of the axis of the Java Trench. NE Indian Ocean. Added to Thesaurus in 1989.

DSDP Site 212
BT	Deep Sea Drilling Project
	.Leg 22
	..DSDP Site 212
RT	Wharton Basin
SN	Wharton Basin, Indian Ocean. Added to Thesaurus in 1989.

DSDP Site 213
BT	Deep Sea Drilling Project
	.Leg 22
	..DSDP Site 213
RT	Indian Ocean
SN	About 300 nautical miles E of Ninetyeast Ridge, Indian Ocean. Added to Thesaurus in 1989.

DSDP Site 214
BT	Deep Sea Drilling Project
	.Leg 22
	..DSDP Site 214
RT	Ninetyeast Ridge
SN	On crest of Ninetyeast Ridge, Indian Ocean. Added to Thesaurus in 1981.

DSDP Site 215
BT	Deep Sea Drilling Project
	.Leg 22
	..DSDP Site 215
RT	Indian Ocean
SN	W of Ninetyeast Ridge in E Indian Ocean. Added to Thesaurus in 1989.

DSDP Site 216
BT	Deep Sea Drilling Project
	.Leg 22
	..DSDP Site 216
RT	Ninetyeast Ridge
SN	Crest of Ninetyeast Ridge near the Equator in E Indian Ocean. Added to Thesaurus in 1989.

DSDP Site 217
BT	Deep Sea Drilling Project
	.Leg 22
	..DSDP Site 217
RT	Ninetyeast Ridge
SN	E flank of Ninetyeast Ridge, E Indian Ocean. Added to Thesaurus in 1989.

DSDP Site 218
BT	Deep Sea Drilling Project
	.Leg 22
	..DSDP Site 218
RT	Bengal Fan
SN	Central Bengal Fan, E Indian Ocean. Added to Thesaurus in 1989.

DSDP Site 219
BT	Deep Sea Drilling Project
	.Leg 23
	..DSDP Site 219
RT	Arabian Sea
SN	In Nine Degree Channel, which lies between Laccadive and Maldive islands in Arabian Sea. Added to Thesaurus in 1989.

DSDP Site 22
BT	Deep Sea Drilling Project
	.Leg 3
	..DSDP Site 22
RT	Rio Grande Rise
SN	Rio Grande Rise, SW Atlantic.

DSDP Site 220
BT	Deep Sea Drilling Project
	.Leg 23
	..DSDP Site 220
RT	Arabian Sea
SN	W Chagos-Laccadive Plateau, Arabian Sea. Added to Thesaurus in 1993.

DSDP Site 221
BT	Deep Sea Drilling Project
	.Leg 23
	..DSDP Site 221
RT	Arabian Sea
SN	S end of Arabian abyssal plain, E Arabian Basin, SE Arabian Sea.

DSDP Site 222
BT	Deep Sea Drilling Project
	.Leg 23
	..DSDP Site 222
RT	Arabian Sea
	Indus Fan
SN	Indus Fan, N Arabian Sea. Added to Thesaurus in 1995.

DSDP Site 223
BT	Deep Sea Drilling Project
	.Leg 23
	..DSDP Site 223
RT	Arabian Sea
SN	N Arabian Sea, W of Owen Ridge. Added to Thesaurus in 1995.

DSDP Site 224
BT	Deep Sea Drilling Project
	.Leg 23
	..DSDP Site 224
RT	Arabian Sea
SN	Owen Ridge, N Arabian Sea. Added to Thesaurus in 1995.

DSDP Site 225
BT	Deep Sea Drilling Project
	.Leg 23
	..DSDP Site 225
RT	Red Sea
SN	Red Sea. Added to Thesaurus in 1981.

DSDP Site 226
BT	Deep Sea Drilling Project
	.Leg 23
	..DSDP Site 226
RT	Atlantis II Deep
SN	SW Atlantis II Deep, central Red Sea.

DSDP Site 227
BT	Deep Sea Drilling Project
	.Leg 23
	..DSDP Site 227
RT	Atlantis II Deep
SN	E Atlantis II Deep, Red Sea. Added to Thesaurus in 1981.

DSDP Site 228
BT	Deep Sea Drilling Project
	.Leg 23
	..DSDP Site 228
RT	Red Sea
SN	Red Sea. Added to Thesaurus in 1981.

DSDP Site 229
BT	Deep Sea Drilling Project
	.Leg 23
	..DSDP Site 229
RT	Red Sea
SN	Shallow basin S of Zubayir Island, S Red Sea.

DSDP Site 23
BT	Deep Sea Drilling Project
	.Leg 4
	..DSDP Site 23
RT	South Atlantic
	Brazil Basin
	Equatorial Atlantic
SN	N Brazil Basin, SW Equatorial Atlantic.

DSDP Site 230
BT	Deep Sea Drilling Project
	.Leg 23
	..DSDP Site 230
RT	Red Sea
SN	W side of axial basin W of Zubayir Island, S Red Sea.

DSDP Site 231
BT	Deep Sea Drilling Project
	.Leg 24
	..DSDP Site 231
RT	Gulf of Aden
SN	S Gulf of Aden, Indian Ocean. Added to Thesaurus in 1993.

DSDP Site 232
BT	Deep Sea Drilling Project
	.Leg 24
	..DSDP Site 232
RT	Gulf of Aden
SN	Illaue-Fartak Trench, E Gulf of Aden, Arabian Sea. Before 1982, also search Site 232 AND Deep Sea Drilling Project. Added to Thesaurus in 1993.

DSDP Site 233
BT	Deep Sea Drilling Project
	.Leg 24
	..DSDP Site 233
RT	Gulf of Aden
SN	Illaue-Fartak Trench, E Gulf of Aden, Arabian Sea. Added to Thesaurus in 1993.

DSDP Site 234
BT	Deep Sea Drilling Project
	.Leg 24
	..DSDP Site 234
RT	Somali Basin
SN	W Somali Basin near the Somali continental margin, W Indian Ocean.

DSDP Site 235
BT	Deep Sea Drilling Project
	.Leg 24
	..DSDP Site 235
RT	Somali Basin
SN	Somali Basin on an abyssal plain near the end of Chain Ridge, W Indian Ocean.

DSDP Site 236
BT	Deep Sea Drilling Project
	.Leg 24
	..DSDP Site 236
RT	Somali Basin
SN	Somali Basin between Carlsberg Ridge and Seychelles Bank, W Indian Ocean. Added to Thesaurus in 1993.

DSDP Site 237
BT	Deep Sea Drilling Project
	.Leg 24
	..DSDP Site 237
RT	Indian Ocean
	ODP Site 707
SN	Mascarene Plateau, W Indian Ocean. Added to Thesaurus in 1989.

DSDP Site 238
BT	Deep Sea Drilling Project
	.Leg 24
	..DSDP Site 238
RT	Indian Ocean
SN	Extreme NE Argo fracture zone, W Indian Ocean. Added to Thesaurus in 1989.

DSDP Site 239
BT	Deep Sea Drilling Project
	.Leg 25
	..DSDP Site 239
RT	Mascarene Basin
SN	W Mascarene Basin, W Indian Ocean.

DSDP Site 24
BT	Deep Sea Drilling Project
	.Leg 4
	..DSDP Site 24
RT	South Atlantic
	Brazil Basin
	Equatorial Atlantic
SN	N Brazil Basin, SW Equatorial Atlantic.

DSDP Site 240
BT	Deep Sea Drilling Project
	.Leg 25
	..DSDP Site 240
RT	Somali Basin
SN	SW Somali Basin, W Indian Ocean.

DSDP Site 241
BT	Deep Sea Drilling Project
	.Leg 25
	..DSDP Site 241
RT	Indian Ocean
SN	East African continental rise, W Indian Ocean. Added to Thesaurus in 1989.

DSDP Site 242
BT	Deep Sea Drilling Project
	.Leg 25
	..DSDP Site 242
RT	Mozambique Channel
SN	Davie Ridge, N Mozambique Channel, W Indian Ocean.

DSDP Site 243
BT	Deep Sea Drilling Project
	.Leg 25
	..DSDP Site 243
RT	Mozambique Channel
SN	Zambesi Canyon, S Mozambique Channel, W Indian Ocean.

DSDP Site 244
BT	Deep Sea Drilling Project
	.Leg 25
	..DSDP Site 244
RT	Mozambique Channel
SN	Zambesi Canyon, S Mozambique Channel , W Indian Ocean. Site abandoned after retrieving core catcher sample.

DSDP Site 245
BT	Deep Sea Drilling Project
	.Leg 25
	..DSDP Site 245
RT	Madagascar Basin
SN	S Madagascar Basin, W Indian Ocean. Added to Thesaurus in 1989.

DSDP Site 246
BT	Deep Sea Drilling Project
	.Leg 25
	..DSDP Site 246
RT	Indian Ocean
SN	Madagascar Plateau, SW Indian Ocean.

DSDP Site 247
BT	Deep Sea Drilling Project
	.Leg 25
	..DSDP Site 247
RT	Indian Ocean
SN	Madagascar Plateau, SW Indian Ocean. Only a core catcher sample was recovered.

DSDP Site 248
BT	Deep Sea Drilling Project
	.Leg 25
	..DSDP Site 248
RT	Indian Ocean
SN	Mozambique Basin, SW Indian Ocean. Added to Thesaurus in 1993.

DSDP Site 249
BT	Deep Sea Drilling Project
	.Leg 25
	..DSDP Site 249
RT	Indian Ocean
SN	Mozambique Plateau, W Indian Ocean. Added to Thesaurus in 1995.

DSDP Site 25
BT	Deep Sea Drilling Project
	.Leg 4
	..DSDP Site 25
RT	South Atlantic
	Equatorial Atlantic
SN	Near base of NE Brazil continental slope, Equatorial Atlantic.

DSDP Site 250
BT	Deep Sea Drilling Project
	.Leg 26
	..DSDP Site 250
RT	Indian Ocean
SN	SE Mozambique Basin, W Indian Ocean.

DSDP Site 251
BT	Deep Sea Drilling Project
	.Leg 26
	..DSDP Site 251
RT	Mid-Indian Ridge
SN	Mid-Indian Ridge, SW Indian Ocean. Added to Thesaurus in 1989.

DSDP Site 252
BT	Deep Sea Drilling Project
	.Leg 26
	..DSDP Site 252
RT	Indian Ocean
SN	Crozet Basin, SW Indian Ocean.

DSDP Site 253
BT	Deep Sea Drilling Project
	.Leg 26
	..DSDP Site 253
RT	Ninetyeast Ridge
SN	Ninetyeast Ridge, SE Indian Ocean. Added to Thesaurus in 1981.

DSDP Site 254
BT	Deep Sea Drilling Project
	.Leg 26
	..DSDP Site 254
RT	Ninetyeast Ridge
SN	Ninetyeast Ridge, SE Indian Ocean. Added to Thesaurus in 1981.

DSDP Site 255
BT	Deep Sea Drilling Project
	.Leg 26
	..DSDP Site 255
RT	Indian Ocean
	Broken Ridge
SN	S Broken Ridge, SE Indian Ocean. Added to Thesaurus in 1993.

DSDP Site 256
BT	Deep Sea Drilling Project
	.Leg 26
	..DSDP Site 256
RT	Wharton Basin
SN	S Wharton Basin, E Indian Ocean. Added to Thesaurus in 1989.

DSDP Site 257
BT	Deep Sea Drilling Project
	.Leg 26
	..DSDP Site 257
RT	Wharton Basin
SN	SE Wharton Basin, E Indian Ocean. Added to Thesaurus in 1989.

DSDP Site 258
BT	Deep Sea Drilling Project
	.Leg 26
	..DSDP Site 258
RT	Indian Ocean
	Naturaliste Plateau
SN	Slope of Naturaliste Plateau, E Indian Ocean. Added to Thesaurus in 1995.

DSDP Site 259
BT	Deep Sea Drilling Project
	.Leg 27
	..DSDP Site 259
RT	Perth abyssal plain
SN	Perth abyssal plain, E Indian Ocean. Added to Thesaurus in 1981.

DSDP Site 26
BT	Deep Sea Drilling Project
	.Leg 4
	..DSDP Site 26
RT	Equatorial Atlantic
	Vema fracture zone
SN	Vema fracture zone, N Equatorial Atlantic.

DSDP Site 260
BT	Deep Sea Drilling Project
	.Leg 27
	..DSDP Site 260
RT	Gascoyne abyssal plain
SN	Gascoyne abyssal plain, E Indian Ocean. Added to Thesaurus in 1981.

DSDP Site 261
BT	Deep Sea Drilling Project
	.Leg 27
	..DSDP Site 261
RT	Argo abyssal plain
SN	NE Argo abyssal plain, E Indian Ocean. Added to Thesaurus in 1981.

DSDP Site 262
BT	Deep Sea Drilling Project
	.Leg 27
	..DSDP Site 262
RT	Southwest Pacific
	Timor Trough
SN	Timor Trough, E Indian Ocean. Added to Thesaurus in 1981.

DSDP Site 263
BT	Deep Sea Drilling Project
	.Leg 27
	..DSDP Site 263
RT	Cuvier abyssal plain
SN	E Cuvier abyssal plain, E Indian Ocean. Added to Thesaurus in 1981.

DSDP Site 264
BT	Deep Sea Drilling Project
	.Leg 28
	..DSDP Site 264
RT	Indian Ocean
	Naturaliste Plateau
SN	Naturaliste Plateau, E Indian Ocean. Added to Thesaurus in 1981.

DSDP Site 265
BT	Deep Sea Drilling Project
	.Leg 28
	..DSDP Site 265
RT	Southeast Indian Ridge
SN	Southeast Indian Ridge, Indian Ocean. Before 1983, also search Site 265 AND Deep Sea Drilling Project. Added to Thesaurus in 1993.

DSDP Site 266
BT	Deep Sea Drilling Project
	.Leg 28
	..DSDP Site 266
RT	Antarctic Ocean
SN	Off the coast of Antarctica, about 800 km S of SE Indian Ridge crest in Antarctic Ocean. Added to Thesaurus in 1989.

DSDP Site 267
BT	Deep Sea Drilling Project
	.Leg 28
	..DSDP Site 267
RT	Antarctic Ocean
SN	Deep basin S of the Southeast Indian Ridge, about 600 km N of Wilkes Land continental shelf, in the Antarctic Ocean.

DSDP Site 268
BT	Deep Sea Drilling Project
	.Leg 28
	..DSDP Site 268
RT	Arctic Ocean
SN	Continental margin, N of Knox Coast, Antarctica.

DSDP Site 269
BT	Deep Sea Drilling Project
	.Leg 28
	..DSDP Site 269
RT	Antarctic Ocean
SN	Near SE edge of South Indian abyssal plain, Antarctic Ocean.

DSDP Site 27
BT	Deep Sea Drilling Project
	.Leg 4
	..DSDP Site 27
RT	North Atlantic
SN	N margin of Demarara abyssal plain, S of Barracuda Ridge, off the Lesser Antilles Arc.

DSDP Site 270
BT	Deep Sea Drilling Project
	.Leg 28
	..DSDP Site 270
RT	Ross Sea
SN	SE Ross Sea, Antarctic Ocean. Added to Thesaurus in 1981.

DSDP Site 271
BT	Deep Sea Drilling Project
	.Leg 28
	..DSDP Site 271
RT	Ross Sea
SN	SE Ross Sea, Antarctic Ocean. Added to Thesaurus in 1993.

DSDP Site 272
BT	Deep Sea Drilling Project
	.Leg 28
	..DSDP Site 272
RT	Ross Sea
SN	SE Ross Sea, Antarctic Ocean. Added to Thesaurus in 1989.

DSDP Site 273
BT	Deep Sea Drilling Project
	.Leg 28
	..DSDP Site 273
RT	Ross Sea
SN	W central Ross Sea, Antarctic Ocean. Before 1982, also search Site 273 AND Deep Sea Drilling Project. Added to Thesaurus in 1993.

DSDP Site 274
BT	Deep Sea Drilling Project
	.Leg 28
	..DSDP Site 274
RT	Ross Sea
SN	Ross Sea, Antarctic Ocean. Added to Thesaurus in 1981.

DSDP Site 275
BT	Deep Sea Drilling Project
	.Leg 29
	..DSDP Site 275
RT	Southwest Pacific
SN	SE Campbell Plateau, SSE of New Zealand.

DSDP Site 276
BT	Deep Sea Drilling Project
	.Leg 29
	..DSDP Site 276
RT	Southwest Pacific
SN	Off E margin of Campbell Plateau, SE of New Zealand. Minimal data from core catcher and bit samples.

DSDP Site 277
BT	Deep Sea Drilling Project
	.Leg 29
	..DSDP Site 277
RT	South Pacific
	Southwest Pacific
SN	Campbell Plateau, SSE of New Zealand. Added to Thesaurus in 1989.

DSDP Site 278
BT	Deep Sea Drilling Project
	.Leg 29
	..DSDP Site 278
RT	Southwest Pacific
SN	SSW of New Zealand, SW Pacific.

DSDP Site 279
BT	Deep Sea Drilling Project
	.Leg 29
	..DSDP Site 279
RT	Southwest Pacific
	Macquarie Ridge
SN	Macquarie Ridge, SSW of New Zealand.

DSDP Site 28
BT	Deep Sea Drilling Project
	.Leg 4
	..DSDP Site 28
RT	North Atlantic
SN	Outer ridge, N of Puerto Rico Trench, NW Atlantic.

DSDP Site 280
BT	Deep Sea Drilling Project
	.Leg 29
	..DSDP Site 280
RT	Southwest Pacific
SN	S of the South Tasman Rise which is S of Tasmania Australia.

DSDP Site 281
BT	Deep Sea Drilling Project
	.Leg 29
	..DSDP Site 281
RT	Southwest Pacific
SN	South Tasman Rise, S of Tasmania Australia.

DSDP Site 282
BT	Deep Sea Drilling Project
	.Leg 29
	..DSDP Site 282
RT	Indian Ocean
SN	W of Tasmania Australia, SE Indian Ocean.

DSDP Site 283
BT	Deep Sea Drilling Project
	.Leg 29
	..DSDP Site 283
RT	Tasman Sea
SN	W Tasman Sea, SE of Tasmania Australia.

DSDP Site 284
BT	Deep Sea Drilling Project
	.Leg 29
	..DSDP Site 284
RT	Tasman Sea
	DSDP Site 593
	Leg 90
SN	W of New Zealand in the Tasman Sea. Site reoccupied as DSDP Site 593 on Leg 90. Added to Thesaurus in 1981.

DSDP Site 285
BT	Deep Sea Drilling Project
	.Leg 30
	..DSDP Site 285
RT	Southwest Pacific
SN	S Fiji Basin, SW Pacific. Added to Thesaurus in 1989.

DSDP Site 286
BT	Deep Sea Drilling Project
	.Leg 30
	..DSDP Site 286
RT	Southwest Pacific
	Vanuatu
SN	New Hebrides Basin, W Pacific. Added to Thesaurus in 1989.

DSDP Site 287
BT	Deep Sea Drilling Project
	.Leg 30
	..DSDP Site 287
RT	Coral Sea
	Coral Sea Basin
SN	Coral Sea Basin, SW Pacific.

DSDP Site 288
BT	Deep Sea Drilling Project
	.Leg 30
	..DSDP Site 288
RT	Southwest Pacific
	Equatorial Pacific
	Ontong Java Plateau
SN	SE margin Ontong Java Plateau, SW Equatorial Pacific. Before 1982, also search Site 288 AND Deep Sea Drilling Project. Added to Thesaurus in 1993.

DSDP Site 289
BT	Deep Sea Drilling Project
	.Leg 30
	..DSDP Site 289
RT	Southwest Pacific
	Equatorial Pacific
	Ontong Java Plateau
SN	N Ontong Java Plateau, SW Pacific Ocean. Added to Thesaurus in 1989.

DSDP Site 29
BT	Deep Sea Drilling Project
	.Leg 4
	..DSDP Site 29
RT	Venezuelan Basin
SN	Central Venezuelan Basin, E Caribbean.

DSDP Site 290
BT	Deep Sea Drilling Project
	.Leg 31
	..DSDP Site 290
RT	West Philippine Basin
SN	W Philippine Basin, NW Pacific.

DSDP Site 291
BT	Deep Sea Drilling Project
	.Leg 31
	..DSDP Site 291
RT	West Philippine Basin
SN	Outer Philippine Trench, S West Philippine Basin. Added to Thesaurus in 1993.

DSDP Site 292
BT	Deep Sea Drilling Project
	.Leg 31
	..DSDP Site 292
RT	Philippine Sea
SN	Benham Rise, W Philippine Sea. Added to Thesaurus in 1981.

DSDP Site 293
BT	Deep Sea Drilling Project
	.Leg 31
	..DSDP Site 293
RT	Philippine Sea
SN	W Philippine Sea. Added to Thesaurus in 1989.

DSDP Site 294
BT	Deep Sea Drilling Project
	.Leg 31
	..DSDP Site 294
RT	West Philippine Basin
SN	W Philippine Basin, NW Pacific. Added to Thesaurus in 1989.

DSDP Site 295
BT	Deep Sea Drilling Project
	.Leg 31
	..DSDP Site 295
RT	West Philippine Basin
SN	W Philippine Basin, NW Pacific.

DSDP Site 296
BT	Deep Sea Drilling Project
	.Leg 31
	..DSDP Site 296
RT	Kyushu-Palau Ridge
SN	Kyushu-Palau Ridge, N Philippine Sea. Added to Thesaurus in 1981.

DSDP Site 297
BT	Deep Sea Drilling Project
	.Leg 31
	..DSDP Site 297
RT	Philippine Sea
	Nankai Trough
SN	Nankai Trough, N Philippine Sea. Added to Thesaurus in 1981.

DSDP Site 298
BT	Deep Sea Drilling Project
	.Leg 31
	..DSDP Site 298
RT	Nankai Trough
SN	Nankai Trough, NW Pacific. Added to Thesaurus in 1989.

DSDP Site 299
BT	Deep Sea Drilling Project
	.Leg 31
	..DSDP Site 299
RT	Japan Sea
	Yamato Basin
SN	Yamato Basin, Japan Sea. Added to Thesaurus in 1989.

DSDP Site 3
BT	Deep Sea Drilling Project
	.Leg 1
	..DSDP Site 3
RT	Gulf of Mexico
	Sigsbee Deep
SN	Sigsbee abyssal plain, Gulf of Mexico. Added to Thesaurus in 1989.

DSDP Site 30
BT	Deep Sea Drilling Project
	.Leg 4
	..DSDP Site 30
RT	Aves Ridge
SN	Aves Ridge, E central Caribbean.

DSDP Site 300
BT	Deep Sea Drilling Project
	.Leg 31
	..DSDP Site 300
RT	Japan Sea
	Japan Basin
SN	S Japan Basin, Japan Sea.

DSDP Site 301
BT	Deep Sea Drilling Project
	.Leg 31
	..DSDP Site 301
RT	Japan Basin
SN	S Japan Basin, Japan Sea.

DSDP Site 302
BT	Deep Sea Drilling Project
	.Leg 31
	..DSDP Site 302
RT	Japan Sea
	Yamato Basin
SN	Yamato Basin, Japan Sea. Added to Thesaurus in 1989.

DSDP Site 303
BT	Deep Sea Drilling Project
	.Leg 32
	..DSDP Site 303
RT	Northwest Pacific
SN	NW Pacific Basin, NW of Shatsky Rise.

DSDP Site 304
BT	Deep Sea Drilling Project
	.Leg 32
	..DSDP Site 304
RT	Northwest Pacific
SN	NW Pacific Basin, NW of Shatsky Rise.

DSDP Site 305
BT	Deep Sea Drilling Project
	.Leg 32
	..DSDP Site 305
RT	Shatsky Rise
SN	Shatsky Rise, NW Pacific. Added to Thesaurus in 1989.

DSDP Site 306
BT	Deep Sea Drilling Project
	.Leg 32
	..DSDP Site 306
RT	Shatsky Rise
SN	SW flank of Shatsky Rise, NW Pacific.

DSDP Site 307
BT	Deep Sea Drilling Project
	.Leg 32
	..DSDP Site 307
RT	Northwest Pacific
SN	SE of Shatsky Rise, NW Pacific.

DSDP Site 308
BT	Deep Sea Drilling Project
	.Leg 32
	..DSDP Site 308
RT	Emperor Seamounts
SN	Koko Guyot, Emperor Seamounts, W of Hess Rise, NW Pacific.

DSDP Site 309
BT	Deep Sea Drilling Project
	.Leg 32
	..DSDP Site 309
RT	Emperor Seamounts
SN	Koko Guyot, Emperor Seamounts, W of Hess Rise, NW Pacific. Very little was recovered from this core.

DSDP Site 31
BT	Deep Sea Drilling Project
	.Leg 4
	..DSDP Site 31
RT	Beata Ridge
SN	Beata Ridge, E central Caribbean.

DSDP Site 310
BT	Deep Sea Drilling Project
	.Leg 32
	..DSDP Site 310
RT	Northwest Pacific
	Hess Rise
SN	Hess Rise, N Pacific. Added to Thesaurus in 1989.

DSDP Site 311
BT	Deep Sea Drilling Project
	.Leg 32
	..DSDP Site 311
RT	Northwest Pacific
SN	S of Hess Rise, NW Pacific.

DSDP Site 312
BT	Deep Sea Drilling Project
	.Leg 32
	..DSDP Site 312
SN	S of Hess Rise, NW Pacific. This site was not successfully cored. It is close to DSDP Site 311.

DSDP Site 313
BT	Deep Sea Drilling Project
	.Leg 32
	..DSDP Site 313
RT	Northeast Pacific
	Mid-Pacific Mountains
SN	NE Mid-Pacific Mountains, NE Pacific. Added to Thesaurus in 1989.

DSDP Site 314
BT	Deep Sea Drilling Project
	.Leg 33
	..DSDP Site 314
RT	Northeast Pacific
	Equatorial Pacific
	Line Islands
SN	Central Equatorial Pacific in the Line Islands S of Hawaii.

DSDP Site 315
BT	Deep Sea Drilling Project
	.Leg 33
	..DSDP Site 315
RT	Northeast Pacific
	Equatorial Pacific
	Line Islands
SN	Central Equatorial Pacific near the Line Islands. Added to Thesaurus in 1981.

DSDP Site 316
BT	Deep Sea Drilling Project
	.Leg 33
	..DSDP Site 316
RT	Northeast Pacific
	Equatorial Pacific
	Line Islands
SN	Line Islands, E Equatorial Pacific.

DSDP Site 317
BT	Deep Sea Drilling Project
	.Leg 33
	..DSDP Site 317
RT	Equatorial Pacific
	Manihiki Plateau
SN	Manihiki Plateau, SE Equatorial Pacific. Added to Thesaurus in 1989.

DSDP Site 318
BT	Deep Sea Drilling Project
	.Leg 33
	..DSDP Site 318
RT	Southeast Pacific
	Equatorial Pacific
	Tuamotu Islands
SN	Near the Tuamotu Islands, French Polynesia, SE Equatorial Pacific.

DSDP Site 319
BT	Deep Sea Drilling Project
	.Leg 34
	..DSDP Site 319
RT	Southeast Pacific
	East Pacific Rise
SN	E of the East Pacific Rise, on W flank of Galapagos Rise in SE Pacific Ocean. Added to Thesaurus in 1981.

DSDP Site 32
BT	Deep Sea Drilling Project
	.Leg 5
	..DSDP Site 32
RT	Northeast Pacific
SN	Off California coast, NE Pacific. Added to Thesaurus in 1993.

DSDP Site 32#DSDP Site 33#DSDP Site 34#DSDP Site 36#DSDP Site 37#DSDP Site 38#DS

DSDP Site 320
BT	Deep Sea Drilling Project
	.Leg 34
	..DSDP Site 320
RT	Southeast Pacific
	Equatorial Pacific
	Nazca Plate
SN	Off the coast of Peru, SE Equatorial Pacific Ocean. Added to Thesaurus in 1981.

DSDP Site 321
BT	Deep Sea Drilling Project
	.Leg 34
	..DSDP Site 321
RT	Southeast Pacific
	Equatorial Pacific
	Nazca Plate
SN	Off the coast of Peru, SE Pacific Ocean. Added to Thesaurus in 1981.

DSDP Site 322
BT	Deep Sea Drilling Project
	.Leg 35
	..DSDP Site 322
RT	Antarctic Ocean
SN	Antarctic Ocean between S tip of South America and the Antarctic Peninsula. Added to Thesaurus in 1981.

DSDP Site 323
BT	Deep Sea Drilling Project
	.Leg 35
	..DSDP Site 323
RT	Antarctic Ocean
SN	Antarctic Ocean, SW of South America in Bellingshausen abyssal plain. Added to Thesaurus in 1981.

DSDP Site 324
BT	Deep Sea Drilling Project
	.Leg 35
	..DSDP Site 324
RT	Antarctic Ocean
SN	Antarctic continental margin, just W of Bellingshausen Sea, in W Antarctic Ocean.

DSDP Site 325
BT	Deep Sea Drilling Project
	.Leg 35
	..DSDP Site 325
RT	Antarctic Ocean
SN	Antarctic Ocean, NW of the Antarctic Peninsula. Added to Thesaurus in 1981.

DSDP Site 326
BT	Deep Sea Drilling Project
	.Leg 36
	..DSDP Site 326
RT	Drake Passage
SN	Drake Passage, Antarctic Ocean.

DSDP Site 327
BT	Deep Sea Drilling Project
	.Leg 36
	..DSDP Site 327
RT	Falkland Plateau
SN	E Falkland Plateau in SW Atlantic Ocean, N of the Scotia Sea. Added to Thesaurus in 1981.

DSDP Site 328
BT	Deep Sea Drilling Project
	.Leg 36
	..DSDP Site 328
RT	South Atlantic
SN	Falkland outer basin, SW Atlantic. Before 1989, also search Site 328 AND Deep Sea Drilling Project. Added to Thesaurus in 1989.

DSDP Site 329
BT	Deep Sea Drilling Project
	.Leg 36
	..DSDP Site 329
RT	Falkland Plateau
SN	E Falkland Plateau in SW Atlantic Ocean, N of the Scotia Sea. Added to Thesaurus in 1981.

DSDP Site 33
BT	Deep Sea Drilling Project
	.Leg 5
	..DSDP Site 33
RT	Northeast Pacific
SN	Distal Delgada Fan, off N California, NE Pacific. Added to Thesaurus in 1995.

DSDP Site 330
BT	Deep Sea Drilling Project
	.Leg 36
	..DSDP Site 330
RT	Falkland Plateau
SN	E Falkland Plateau in SW Atlantic Ocean, N of the Scotia Sea. Added to Thesaurus in 1981.

DSDP Site 331
BT	Deep Sea Drilling Project
	.Leg 36
	..DSDP Site 331
RT	Argentine Basin
SN	Argentine Basin, SW Atlantic.

DSDP Site 332
BT	Deep Sea Drilling Project
	.Leg 37
	..DSDP Site 332
RT	North Atlantic
	Mid-Atlantic Ridge
SN	Near crest of Mid-Atlantic Ridge, W of the Azores. Added to Thesaurus in 1981.

DSDP Site 333
BT	Deep Sea Drilling Project
	.Leg 37
	..DSDP Site 333
RT	North Atlantic
	Mid-Atlantic Ridge
SN	Near crest of Mid-Atlantic Ridge. Added to Thesaurus in 1981.

DSDP Site 334
BT	Deep Sea Drilling Project
	.Leg 37
	..DSDP Site 334
RT	North Atlantic
	Mid-Atlantic Ridge
SN	W flank of Mid-Atlantic Ridge. Added to Thesaurus in 1981.

DSDP Site 335
BT	Deep Sea Drilling Project
	.Leg 37
	..DSDP Site 335
RT	North Atlantic
	Mid-Atlantic Ridge
SN	W flank of the Mid-Atlantic Ridge. Added to Thesaurus in 1981.

DSDP Site 336
BT	Deep Sea Drilling Project
	.Leg 38
	..DSDP Site 336
RT	Arctic Ocean
	Iceland-Faeroe Ridge
	Norwegian Sea
SN	N flank of Iceland-Faeroe Ridge, Norwegian Sea. Before 1989, also search Site 336 AND Deep Sea Drilling Project. Added to Thesaurus in 1989.

DSDP Site 337
BT	Deep Sea Drilling Project
	.Leg 38
	..DSDP Site 337
RT	Norwegian Sea
SN	Norwegian Basin. Added to Thesaurus in 1995.

DSDP Site 338
BT	Deep Sea Drilling Project
	.Leg 38
	..DSDP Site 338
RT	Voring Plateau
SN	Outer Voring Plateau, Norwegian Sea. Added to Thesaurus in 1989.

DSDP Site 339
BT	Deep Sea Drilling Project
	.Leg 38
	..DSDP Site 339
RT	Voring Plateau
SN	Inner Voring Plateau, Norwegian Sea. Added to Thesaurus in 1995.

DSDP Site 34
BT	Deep Sea Drilling Project
	.Leg 5
	..DSDP Site 34
RT	Northeast Pacific
SN	Abyssal plain, distal Delgada Fan, off N California, NE Pacific. Added to Thesaurus in 1995.

DSDP Site 340
BT	Deep Sea Drilling Project
	.Leg 38
	..DSDP Site 340
RT	Voring Plateau
SN	Inner Voring Plateau, Norwegian Sea.

DSDP Site 341
BT	Deep Sea Drilling Project
	.Leg 38
	..DSDP Site 341
RT	Voring Plateau
SN	Inner Voring Plateau, Norwegian Sea. Added to Thesaurus in 1995.

DSDP Site 342
BT	Deep Sea Drilling Project
	.Leg 38
	..DSDP Site 342
RT	Voring Plateau
SN	Outer Voring Plateau, Norwegian Sea. Added to Thesaurus in 1995.

DSDP Site 343
BT	Deep Sea Drilling Project
	.Leg 38
	..DSDP Site 343
RT	Norwegian Sea
	Voring Plateau
SN	At the foot of Voring Plateau in Lofoten Basin, Norwegian Sea. Added to Thesaurus in 1989.

DSDP Site 344
BT	Deep Sea Drilling Project
	.Leg 38
	..DSDP Site 344
RT	Norwegian Sea
	Knipovich Ridge
SN	Knipovich Ridge, Norwegian Sea. Added to Thesaurus in 1989.

DSDP Site 345
BT	Deep Sea Drilling Project
	.Leg 38
	..DSDP Site 345
RT	Norwegian Sea
SN	Lofoten Basin, Norwegian Sea. Added to Thesaurus in 1989.

DSDP Site 346
BT	Deep Sea Drilling Project
	.Leg 38
	..DSDP Site 346
RT	Jan Mayen Ridge
SN	Jan Mayen Ridge, Norwegian Sea. Added to Thesaurus in 1989.

DSDP Site 347
BT	Deep Sea Drilling Project
	.Leg 38
	..DSDP Site 347
RT	Jan Mayen Ridge
SN	Jan Mayen Ridge, Norwegian Sea.

DSDP Site 348
BT	Deep Sea Drilling Project
	.Leg 38
	..DSDP Site 348
RT	Norwegian Sea
	Icelandic Plateau
SN	Icelandic Plateau, Norwegian Sea. Added to Thesaurus in 1989.

DSDP Site 349
BT	Deep Sea Drilling Project
	.Leg 38
	..DSDP Site 349
RT	Jan Mayen Ridge
SN	Jan Mayen Ridge, Norwegian Sea. Added to Thesaurus in 1995.

DSDP Site 35
BT	Deep Sea Drilling Project
	.Leg 5
	..DSDP Site 35
RT	Gorda Rise
SN	Gorda Rise, NE Pacific. Added to Thesaurus in 1993.

DSDP Site 350
BT	Deep Sea Drilling Project
	.Leg 38
	..DSDP Site 350
RT	Norwegian Sea
SN	S Norwegian Sea. Added to Thesaurus in 1995.

DSDP Site 352
BT	Deep Sea Drilling Project
	.Leg 38
	..DSDP Site 352
RT	Iceland-Faeroe Ridge
	Norwegian Sea
SN	Iceland-Faeroe Ridge, S Norwegian Sea. Added to Thesaurus in 1995.

DSDP Site 353
BT	Deep Sea Drilling Project
	.Leg 39
	..DSDP Site 353
RT	North Atlantic
	Mid-Atlantic Ridge
	Vema fracture zone
SN	Vema fracture zone at Mid-Atlantic Ridge, N Atlantic.

DSDP Site 354
BT	Deep Sea Drilling Project
	.Leg 39
	..DSDP Site 354
RT	North Atlantic
	Equatorial Atlantic
	Leg 154
SN	Ceara Rise, N central Equatorial Atlantic. Added to Thesaurus in 1989.

DSDP Site 355
BT	Deep Sea Drilling Project
	.Leg 39
	..DSDP Site 355
RT	Brazil Basin
SN	Brazil Basin, SW Atlantic. Added to Thesaurus in 1989.

DSDP Site 356
BT	Deep Sea Drilling Project
	.Leg 39
	..DSDP Site 356
RT	South Atlantic
SN	Sao Paulo Plateau, SW Atlantic Ocean. Added to Thesaurus in 1981.

DSDP Site 357
BT	Deep Sea Drilling Project
	.Leg 39
	..DSDP Site 357
RT	Rio Grande Rise
SN	Rio Grande Rise, SW Atlantic Ocean. Added to Thesaurus in 1981.

DSDP Site 358
BT	Deep Sea Drilling Project
	.Leg 39
	..DSDP Site 358
RT	Argentine Basin
SN	N Argentine Basin, SW Atlantic.

DSDP Site 359
BT	Deep Sea Drilling Project
	.Leg 39
	..DSDP Site 359
RT	Walvis Ridge
SN	Walvis Ridge, SE Atlantic.

DSDP Site 36
BT	Deep Sea Drilling Project
	.Leg 5
	..DSDP Site 36
RT	Northeast Pacific
SN	Abyssal hills, N of Mendocino fracture zone, off N California, NE Pacific. Added to Thesaurus in 1995.

DSDP Site 360
BT	Deep Sea Drilling Project
	.Leg 40
	..DSDP Site 360
RT	Cape Basin
SN	Cape Basin, SE Atlantic. Added to Thesaurus in 1989.

DSDP Site 361
BT	Deep Sea Drilling Project
	.Leg 40
	..DSDP Site 361
RT	South Atlantic
SN	Off Cape of Good Hope, SE Atlantic Ocean. Added to Thesaurus in 1981.

DSDP Site 362
BT	Deep Sea Drilling Project
	.Leg 40
	..DSDP Site 362
RT	Walvis Ridge
SN	Walvis Ridge, SE Atlantic Ocean. Added to Thesaurus in 1981.

DSDP Site 363
BT	Deep Sea Drilling Project
	.Leg 40
	..DSDP Site 363
RT	Walvis Ridge
SN	Walvis Ridge, SE Atlantic Ocean. Added to Thesaurus in 1981.

DSDP Site 364
BT	Deep Sea Drilling Project
	.Leg 40
	..DSDP Site 364
RT	Angola Basin
SN	Angola Basin, SE Atlantic Ocean. Added to Thesaurus in 1981.

DSDP Site 365
BT	Deep Sea Drilling Project
	.Leg 40
	..DSDP Site 365
RT	Angola Basin
SN	Angola Basin, SE Atlantic. Added to Thesaurus in 1989.

DSDP Site 366
BT	Deep Sea Drilling Project
	.Leg 41
	..DSDP Site 366
RT	Sierra Leone Rise
	Equatorial Atlantic
	ODP Site 668
SN	Sierra Leone Rise, NE Equatorial Atlantic. Added to Thesaurus in 1989.

DSDP Site 367
BT	Deep Sea Drilling Project
	.Leg 41
	..DSDP Site 367
RT	Cape Verde Basin
SN	Cape Verde Basin, NE Atlantic Ocean. Added to Thesaurus in 1981.

DSDP Site 368
BT	Deep Sea Drilling Project
	.Leg 41
	..DSDP Site 368
RT	Cape Verde Rise
SN	Cape Verde Rise, NE Atlantic Ocean. Added to Thesaurus in 1981.

DSDP Site 369
BT	Deep Sea Drilling Project
	.Leg 41
	..DSDP Site 369
RT	North Atlantic
SN	SE of Canary Islands, NE Atlantic Ocean. Added to Thesaurus in 1981.

DSDP Site 37
BT	Deep Sea Drilling Project
	.Leg 5
	..DSDP Site 37
RT	Northeast Pacific
SN	Abyssal hills, N of Mendocino fracture zone, NE Pacific.

DSDP Site 370
BT	Deep Sea Drilling Project
	.Leg 41
	..DSDP Site 370
RT	North Atlantic
SN	Off Morocco, NE Atlantic Ocean. Added to Thesaurus in 1981.

DSDP Site 371
BT	Deep Sea Drilling Project
	.Leg 42A
	..DSDP Site 371
RT	West Mediterranean
SN	N of Algeria, West Mediterranean.

DSDP Site 372
BT	Deep Sea Drilling Project
	.Leg 42A
	..DSDP Site 372
RT	Balearic Basin
SN	Balearic Basin, Mediterranean Sea. Added to Thesaurus in 1981.

DSDP Site 373
BT	Deep Sea Drilling Project
	.Leg 42A
	..DSDP Site 373
RT	Tyrrhenian Sea
SN	Tyrrhenian abyssal plain, Tyrrhenian Sea.

DSDP Site 374
BT	Deep Sea Drilling Project
	.Leg 42A
	..DSDP Site 374
RT	Ionian Sea
SN	Ionian Sea. Added to Thesaurus in 1981.

DSDP Site 375
BT	Deep Sea Drilling Project
	.Leg 42A
	..DSDP Site 375
RT	Florence Rise
SN	Florence Rise, E Mediterranean Sea. Added to Thesaurus in 1989.

DSDP Site 376
BT	Deep Sea Drilling Project
	.Leg 42A
	..DSDP Site 376
RT	Florence Rise
SN	Florence Rise, E Mediterranean Sea. Added to Thesaurus in 1989.

DSDP Site 377
BT	Deep Sea Drilling Project
	.Leg 42A
	..DSDP Site 377
RT	East Mediterranean
	DSDP Site 126
	Mediterranean Ridge
SN	Mediterranean Ridge cleft, East Mediterranean. Added to Thesaurus in 1995.

DSDP Site 378
BT	Deep Sea Drilling Project
	.Leg 42A
	..DSDP Site 378
RT	East Mediterranean
SN	Cretan Basin, East Mediterranean. Added to Thesaurus in 1993.

DSDP Site 379
BT	Deep Sea Drilling Project
	.Leg 42B
	..DSDP Site 379
RT	Black Sea
SN	E Black Sea. Added to Thesaurus in 1981.

DSDP Site 38
BT	Deep Sea Drilling Project
	.Leg 5
	..DSDP Site 38
RT	Northeast Pacific
SN	Abyssal hills, between Mendocino and Pioneer fracture zones, NE Pacific.

DSDP Site 380
BT	Deep Sea Drilling Project
	.Leg 42B
	..DSDP Site 380
RT	Black Sea
SN	W Black Sea. Added to Thesaurus in 1981.

DSDP Site 381
BT	Deep Sea Drilling Project
	.Leg 42B
	..DSDP Site 381
RT	Black Sea
SN	W Black Sea. Added to Thesaurus in 1981.

DSDP Site 382
BT	Deep Sea Drilling Project
	.Leg 43
	..DSDP Site 382
RT	New England Seamounts
SN	Nashville Seamount, New England Seamounts, NW Atlantic. Added to Thesaurus in 1993.

DSDP Site 383
BT	Deep Sea Drilling Project
	.Leg 43
	..DSDP Site 383
RT	Sohm abyssal plain
SN	J-anomaly Ridge, Sohm abyssal plain, NW Atlantic.

DSDP Site 384
BT	Deep Sea Drilling Project
	.Leg 43
	..DSDP Site 384
RT	North Atlantic
	Grand Banks
SN	J-anomaly Ridge, Grand Banks, NW Atlantic. Added to Thesaurus in 1989.

DSDP Site 385
BT	Deep Sea Drilling Project
	.Leg 43
	..DSDP Site 385
RT	New England Seamounts
SN	Vogel Seamount, New England Seamounts, NW Atlantic. Added to Thesaurus in 1993.

DSDP Site 386
BT	Deep Sea Drilling Project
	.Leg 43
	..DSDP Site 386
RT	Bermuda Rise
SN	Central Bermuda Rise, NW Atlantic. Added to Thesaurus in 1989.

DSDP Site 387
BT	Deep Sea Drilling Project
	.Leg 43
	..DSDP Site 387
RT	Bermuda Rise
SN	W Bermuda Rise, NW Atlantic. Added to Thesaurus in 1989.

DSDP Site 388
BT	Deep Sea Drilling Project
	.Leg 44
	..DSDP Site 388
RT	North Atlantic
SN	Lower continental rise hills, E of Cape Hatteras, NW Atlantic.

DSDP Site 389
BT	Deep Sea Drilling Project
	.Leg 44
	..DSDP Site 389
RT	Blake Nose
SN	N rim of Blake Nose, NW Atlantic.

DSDP Site 39
BT	Deep Sea Drilling Project
	.Leg 5
	..DSDP Site 39
RT	Northeast Pacific
SN	Abyssal hills, between Pioneer and Murray fracture zones, NE Pacific.

DSDP Site 390
BT	Deep Sea Drilling Project
	.Leg 44
	..DSDP Site 390
RT	Blake Nose
	ODP Site 1049
SN	Blake Nose, NW Atlantic. Added to Thesaurus in 1989.

DSDP Site 391
BT	Deep Sea Drilling Project
	.Leg 44
	..DSDP Site 391
RT	Blake-Bahama Basin
SN	Blake-Bahama Basin, NW Atlantic Ocean. Added to Thesaurus in 1981.

DSDP Site 392
BT	Deep Sea Drilling Project
	.Leg 44
	..DSDP Site 392
RT	Blake Nose
SN	Blake Nose, Blake Plateau, NW Atlantic. Added to Thesaurus in 1993.

DSDP Site 395
BT	Deep Sea Drilling Project
	.IPOD
	..Leg 45
	...DSDP Site 395
BT	Deep Sea Drilling Project
	.IPOD
	..Leg 78B
	...DSDP Site 395
BT	Ocean Drilling Program
	.Leg 109
	..DSDP Site 395
BT	Ocean Drilling Program
	.Leg 174B
	..DSDP Site 395
RT	North Atlantic
	Mid-Atlantic Ridge
	Kane fracture zone
SN	N central Atlantic Ocean near the Mid-Atlantic Ridge axis. Holes 395 and 395A were drilled on Leg 45. Hole 395A was reentered and Hole 395B was drilled on Leg 78B. Hole 395A was reentered on Leg 109 and on Leg 174B. This term has multiple hierarchies. Add

DSDP Site 396
BT	Deep Sea Drilling Project
	.IPOD
	..Leg 45
	...DSDP Site 396
BT	Deep Sea Drilling Project
	.IPOD
	..Leg 46
	...DSDP Site 396
RT	North Atlantic
	Mid-Atlantic Ridge
SN	N central Atlantic Ocean near the Mid-Atlantic Ridge axis. This term has multiple hierarchies. Added to Thesaurus in 1981.

DSDP Site 397
BT	Deep Sea Drilling Project
	.IPOD
	..Leg 47
	...DSDP Site 397
RT	North Atlantic
	Canary Islands
	Leg 157
	ODP Site 955
	Cape Bojador
SN	Cape Bojador in NE Atlantic Ocean, near Canary Islands. Added to Thesaurus in 1989.

DSDP Site 398
BT	Deep Sea Drilling Project
	.IPOD
	..Leg 47
	...DSDP Site 398
RT	North Atlantic
	Leg 157
SN	Off the coast of N Portugal in NE Atlantic. Added to Thesaurus in 1989.

DSDP Site 399
BT	Deep Sea Drilling Project
	.IPOD
	..Leg 48
	...DSDP Site 399
RT	North Atlantic
SN	Biscay abyssal plain, NE Atlantic.

DSDP Site 4
BT	Deep Sea Drilling Project
	.Leg 1
	..DSDP Site 4
RT	North Atlantic
SN	NW Atlantic, in Horizon A area, E of San Salvador, Bahamas. Added to Thesaurus in 1989.

DSDP Site 40
BT	Deep Sea Drilling Project
	.Leg 5
	..DSDP Site 40
RT	Northeast Pacific
SN	NE Pacific, between Mendocino and Molokai fracture zones. Added to Thesaurus in 1993.

DSDP Site 400
BT	Deep Sea Drilling Project
	.IPOD
	..Leg 48
	...DSDP Site 400
RT	North Atlantic
SN	Biscay abyssal plain, NE Atlantic. Added to Thesaurus in 1989.

DSDP Site 401
BT	Deep Sea Drilling Project
	.IPOD
	..Leg 48
	...DSDP Site 401
RT	North Atlantic
SN	Edge of Meriadzek Terrace, NE Atlantic. Added to Thesaurus in 1989.

DSDP Site 402
BT	Deep Sea Drilling Project
	.IPOD
	..Leg 48
	...DSDP Site 402
RT	North Atlantic
	Bay of Biscay
SN	Continental slope of Bay of Biscay, NE Atlantic. Added to Thesaurus in 1989.

DSDP Site 403
BT	Deep Sea Drilling Project
	.IPOD
	..Leg 48
	...DSDP Site 403
RT	Rockall Plateau
SN	SW margin of Rockall Plateau, NE Atlantic. Added to Thesaurus in 1989.

DSDP Site 404
BT	Deep Sea Drilling Project
	.IPOD
	..Leg 48
	...DSDP Site 404
RT	Rockall Plateau
SN	SW margin of Rockall Plateau, NE Atlantic. Added to Thesaurus in 1989.

DSDP Site 405
BT	Deep Sea Drilling Project
	.IPOD
	..Leg 48
	...DSDP Site 405
RT	Rockall Plateau
SN	S Rockall Plateau, NE Atlantic. Added to Thesaurus in 1989.

DSDP Site 406
BT	Deep Sea Drilling Project
	.IPOD
	..Leg 48
	...DSDP Site 406
RT	Rockall Plateau
SN	S Rockall Plateau, NE Atlantic. Added to Thesaurus in 1989.

DSDP Site 407
BT	Deep Sea Drilling Project
	.IPOD
	..Leg 49
	...DSDP Site 407
RT	Mid-Atlantic Ridge
	Reykjanes Ridge
SN	Reykjanes Ridge, N Atlantic. Added to Thesaurus in 1989.

DSDP Site 408
BT	Deep Sea Drilling Project
	.IPOD
	..Leg 49
	...DSDP Site 408
RT	Mid-Atlantic Ridge
	Reykjanes Ridge
SN	Reykjanes Ridge, N Atlantic. Added to Thesaurus in 1989.

DSDP Site 409
BT	Deep Sea Drilling Project
	.IPOD
	..Leg 49
	...DSDP Site 409
RT	Reykjanes Ridge
SN	Reykjanes Ridge, N Atlantic.

DSDP Site 41
BT	Deep Sea Drilling Project
	.Leg 5
	..DSDP Site 41
RT	Northeast Pacific
SN	Abyssal hills, between Molokai and Clarion fracture zones, NE Pacific.

DSDP Site 410
BT	Deep Sea Drilling Project
	.IPOD
	..Leg 49
	...DSDP Site 410
RT	North Atlantic
	Mid-Atlantic Ridge
SN	Crest of Mid-Atlantic Ridge in N Atlantic. Added to Thesaurus in 1989.

DSDP Site 411
BT	Deep Sea Drilling Project
	.IPOD
	..Leg 49
	...DSDP Site 411
RT	FAMOUS
	North Atlantic
	Mid-Atlantic Ridge
SN	Crest of Mid-Atlantic Ridge FAMOUS area, N Atlantic.

DSDP Site 412
BT	Deep Sea Drilling Project
	.IPOD
	..Leg 49
	...DSDP Site 412
RT	FAMOUS
	North Atlantic
	Mid-Atlantic Ridge
SN	Crest of Mid-Atlantic Ridge FAMOUS area, N Atlantic.

DSDP Site 413
BT	Deep Sea Drilling Project
	.IPOD
	..Leg 49
	...DSDP Site 413
RT	FAMOUS
	North Atlantic
	Mid-Atlantic Ridge
SN	Crest of Mid-Atlantic Ridge, FAMOUS area, N Atlantic.

DSDP Site 415
BT	Deep Sea Drilling Project
	.IPOD
	..Leg 50
	...DSDP Site 415
RT	North Atlantic
SN	Agadir Canyon, off S coast of Morocco, NE Atlantic. Added to Thesaurus in 1995.

DSDP Site 416
BT	Deep Sea Drilling Project
	.IPOD
	..Leg 50
	...DSDP Site 416
RT	North Atlantic
SN	Off coast of Morocco in NE Atlantic Ocean. Added to Thesaurus in 1989.

DSDP Site 417
BT	Deep Sea Drilling Project
	.IPOD
	..Leg 51
	...DSDP Site 417
BT	Deep Sea Drilling Project
	.IPOD
	..Leg 52
	...DSDP Site 417
RT	Bermuda Rise
SN	Near S end of Bermuda Rise, NW Atlantic Ocean. Site drilled on Leg 51A, Leg 51B, and Leg 52. This term has multiple hierarchies. Added to Thesaurus in 1981.

DSDP Site 418
BT	Ocean Drilling Program
	.Leg 102
	..DSDP Site 418
BT	Deep Sea Drilling Project
	.IPOD
	..Leg 52
	...DSDP Site 418
BT	Deep Sea Drilling Project
	.IPOD
	..Leg 53
	...DSDP Site 418
RT	Bermuda Rise
SN	Near S end of Bermuda Rise, NW Atlantic Ocean. This term has multiple hierarchies. Added to Thesaurus in 1981.

DSDP Site 419
BT	Deep Sea Drilling Project
	.IPOD
	..Leg 54
	...DSDP Site 419
RT	Northeast Pacific
	Equatorial Pacific
	East Pacific Rise
SN	East Pacific Rise, NE Equatorial Pacific. Before 1982, also search Site 419 AND Deep Sea Drilling Project. Added to Thesaurus in 1993.

DSDP Site 42
BT	Deep Sea Drilling Project
	.Leg 5
	..DSDP Site 42
RT	Northeast Pacific
SN	Abyssal hills between Clarion and Clipperton fracture zones, NE Pacific. Added to Thesaurus in 1995.

DSDP Site 420
BT	Deep Sea Drilling Project
	.IPOD
	..Leg 54
	...DSDP Site 420
RT	Northeast Pacific
	East Pacific Rise
SN	East Pacific Rise, NE Pacific. Before 1982, also search Site 420 AND Deep Sea Drilling Project. Added to Thesaurus in 1993.

DSDP Site 421
BT	Deep Sea Drilling Project
	.IPOD
	..Leg 54
	...DSDP Site 421
RT	Northeast Pacific
	East Pacific Rise
SN	W flank of East Pacific Rise, NE Pacific. Before 1982, also search Site 421 AND Deep Sea Drilling Project.

DSDP Site 422
BT	Deep Sea Drilling Project
	.IPOD
	..Leg 54
	...DSDP Site 422
RT	Northeast Pacific
	East Pacific Rise
SN	W flank of East Pacific Rise, NE Pacific. Before 1982, also search Site 422 AND Deep Sea Drilling Project.

DSDP Site 423
BT	Deep Sea Drilling Project
	.IPOD
	..Leg 54
	...DSDP Site 423
RT	Northeast Pacific
	East Pacific Rise
SN	W flank of East Pacific Rise, NE Pacific. Before 1982, also search Site 423 AND Deep Sea Drilling Project.

DSDP Site 424
BT	Deep Sea Drilling Project
	.IPOD
	..Leg 54
	...DSDP Site 424
RT	Northeast Pacific
	Equatorial Pacific
SN	NE Equatorial Pacific. Added to Thesaurus in 1989.

DSDP Site 425
BT	Deep Sea Drilling Project
	.IPOD
	..Leg 54
	...DSDP Site 425
RT	Northeast Pacific
	Equatorial Pacific
SN	N of Galapagos spreading center, NE Equatorial Pacific. Before 1982, also search Site 425 AND Deep Sea Drilling Project.

DSDP Site 427
BT	Deep Sea Drilling Project
	.IPOD
	..Leg 54
	...DSDP Site 427
RT	Siqueiros fracture zone
SN	Trough in Siqueiros fracture zone, NE Pacific. Before 1982, also search Site 427 AND Deep Sea Drilling Project.

DSDP Site 428
BT	Deep Sea Drilling Project
	.IPOD
	..Leg 54
	...DSDP Site 428
RT	Northeast Pacific
	East Pacific Rise
SN	W flank of East Pacific Rise, NE Pacific. Before 1982, also search Site 428 AND Deep Sea Drilling Project.

DSDP Site 429
BT	Deep Sea Drilling Project
	.IPOD
	..Leg 54
	...DSDP Site 429
RT	Northeast Pacific
	East Pacific Rise
SN	W flank of East Pacific Rise, NE Pacific. Before 1982, also search Site 429 AND Deep Sea Drilling Project.

DSDP Site 43
BT	Deep Sea Drilling Project
	.Leg 5
	..DSDP Site 43
RT	Northeast Pacific
SN	Abyssal hills, between Clarion and Molokai fracture zones, E of Hawaii, NE Pacific.

DSDP Site 430
BT	Deep Sea Drilling Project
	.IPOD
	..Leg 55
	...DSDP Site 430
RT	Emperor Seamounts
SN	Ojin Seamount, NW Pacific. Added to Thesaurus in 1989.

DSDP Site 431
BT	Deep Sea Drilling Project
	.IPOD
	..Leg 55
	...DSDP Site 431
RT	Emperor Seamounts
SN	Seamount C, NW Pacific. Added to Thesaurus in 1989.

DSDP Site 432
BT	Deep Sea Drilling Project
	.IPOD
	..Leg 55
	...DSDP Site 432
RT	Emperor Seamounts
SN	Nintoku Seamount, NW Pacific. Added to Thesaurus in 1989.

DSDP Site 433
BT	Deep Sea Drilling Project
	.IPOD
	..Leg 55
	...DSDP Site 433
RT	Emperor Seamounts
SN	Suiko Seamount, NW Pacific. Added to Thesaurus in 1989.

DSDP Site 434
BT	Deep Sea Drilling Project
	.IPOD
	..Leg 56
	...DSDP Site 434
RT	Japan Trench
SN	Japan Trench, NW Pacific. Added to Thesaurus in 1989.

DSDP Site 435
BT	Deep Sea Drilling Project
	.IPOD
	..Leg 56
	...DSDP Site 435
RT	Japan Trench
SN	Japan Trench, NW Pacific. Added to Thesaurus in 1989.

DSDP Site 436
BT	Deep Sea Drilling Project
	.IPOD
	..Leg 56
	...DSDP Site 436
RT	Northwest Pacific
SN	NW Pacific. Added to Thesaurus in 1989.

DSDP Site 438
BT	Deep Sea Drilling Project
	.IPOD
	..Leg 57
	...DSDP Site 438
RT	Japan Trench
SN	Japan Trench, NW Pacific Ocean. Added to Thesaurus in 1989.

DSDP Site 439
BT	Deep Sea Drilling Project
	.IPOD
	..Leg 57
	...DSDP Site 439
RT	Northwest Pacific
SN	Near Japan Trench in NW Pacific. Added to Thesaurus in 1989.

DSDP Site 44
BT	Deep Sea Drilling Project
	.Leg 6
	..DSDP Site 44
RT	Northeast Pacific
SN	Horizon Ridge, a shallow ridge, S of Hawaiian Ridge, NE Pacific.

DSDP Site 440
BT	Deep Sea Drilling Project
	.IPOD
	..Leg 57
	...DSDP Site 440
RT	Japan Trench
SN	Japan Trench, NW Pacific. Added to Thesaurus in 1989.

DSDP Site 442
BT	Deep Sea Drilling Project
	.IPOD
	..Leg 58
	...DSDP Site 442
RT	Philippine Sea
	Shikoku Basin
SN	Shikoku Basin, N Philippine Sea. Added to Thesaurus in 1989.

DSDP Site 443
BT	Deep Sea Drilling Project
	.IPOD
	..Leg 58
	...DSDP Site 443
RT	Shikoku Basin
SN	Shikoku Basin, N Philippine Sea. Before 1982, also search Site 443 AND Deep Sea Drilling Project.

DSDP Site 444
BT	Deep Sea Drilling Project
	.IPOD
	..Leg 58
	...DSDP Site 444
RT	Shikoku Basin
SN	Shikoku Basin, N Philippine Sea. Before 1982, also search Site 444 AND Deep Sea Drilling Project.

DSDP Site 445
BT	Deep Sea Drilling Project
	.IPOD
	..Leg 58
	...DSDP Site 445
RT	Daito Ridge
SN	Small basin on Daito Ridge, NW Philippine Sea. Before 1982, also search Site 445 AND Deep Sea Drilling Project. Added to Thesaurus in 1993.

DSDP Site 446
BT	Deep Sea Drilling Project
	.IPOD
	..Leg 58
	...DSDP Site 446
RT	Philippine Sea
SN	Daito Basin, Philippine Sea. Before 1982, also search Site 446 AND Deep Sea Drilling Project. Added to Thesaurus in 1993.

DSDP Site 447
BT	Deep Sea Drilling Project
	.IPOD
	..Leg 59
	...DSDP Site 447
RT	West Philippine Basin
SN	E West Philippine Basin, Philippine Sea. Before 1982, also search Site 447 AND Deep Sea Drilling Project.

DSDP Site 448
BT	Deep Sea Drilling Project
	.IPOD
	..Leg 59
	...DSDP Site 448
RT	Kyushu-Palau Ridge
SN	Western edge of Kyushu-Palau Ridge, central Philippine Sea. Added to Thesaurus in 1995.

DSDP Site 449
BT	Deep Sea Drilling Project
	.IPOD
	..Leg 59
	...DSDP Site 449
RT	Parece Vela Basin
SN	W Parece Vela Basin, Philippine Sea. Before 1982, also search Site 449 AND Deep Sea Drilling Project.

DSDP Site 45
BT	Deep Sea Drilling Project
	.Leg 6
	..DSDP Site 45
RT	Northeast Pacific
	Central Pacific
SN	N central Pacific Ocean W of S Hawaiian Ridge.

DSDP Site 450
BT	Deep Sea Drilling Project
	.IPOD
	..Leg 59
	...DSDP Site 450
RT	Parece Vela Basin
SN	E Parece Vela Basin, Philippine Sea. Before 1982, also search Site 450 AND Deep Sea Drilling Project. Added to Thesaurus in 1993.

DSDP Site 451
BT	Deep Sea Drilling Project
	.IPOD
	..Leg 59
	...DSDP Site 451
RT	Northwest Pacific
SN	E edge of West Mariana Ridge, NW Pacific. Before 1982, also search Site 451 AND Deep Sea Drilling Project.

DSDP Site 452
BT	Deep Sea Drilling Project
	.IPOD
	..Leg 60
	...DSDP Site 452
RT	Parece Vela Basin
SN	N Parece Vela Basin, E Philippine Sea.

DSDP Site 453
BT	Deep Sea Drilling Project
	.IPOD
	..Leg 60
	...DSDP Site 453
RT	Philippine Sea
	Mariana Trough
SN	Mariana Trough, Philippine Sea. Added to Thesaurus in 1993.

DSDP Site 454
BT	Deep Sea Drilling Project
	.IPOD
	..Leg 60
	...DSDP Site 454
RT	Philippine Sea
	Mariana Trough
SN	Mariana Trough, Philippine Sea.

DSDP Site 455
BT	Deep Sea Drilling Project
	.IPOD
	..Leg 60
	...DSDP Site 455
RT	Philippine Sea
	Mariana Trough
SN	E Mariana Trough, Philippine Sea.

DSDP Site 456
BT	Deep Sea Drilling Project
	.IPOD
	..Leg 60
	...DSDP Site 456
RT	Philippine Sea
	Mariana Trough
SN	E Mariana Trough, Philippine Sea.

DSDP Site 457
BT	Deep Sea Drilling Project
	.IPOD
	..Leg 60
	...DSDP Site 457
RT	Philippine Sea
SN	Mariana arc, SE Philippine Sea. Added to Thesaurus in 1995.

DSDP Site 458
BT	Deep Sea Drilling Project
	.IPOD
	..Leg 60
	...DSDP Site 458
RT	Northwest Pacific
SN	NW Pacific Ocean. Added to Thesaurus in 1985.

DSDP Site 459
BT	Deep Sea Drilling Project
	.IPOD
	..Leg 60
	...DSDP Site 459
RT	Northwest Pacific
SN	NW Pacific Ocean. Added to Thesaurus in 1985.

DSDP Site 46
BT	Deep Sea Drilling Project
	.Leg 6
	..DSDP Site 46
RT	Northwest Pacific
SN	Fracture zone ridge, N of Mid-Pacific Mountains, NW Pacific.

DSDP Site 460
BT	Deep Sea Drilling Project
	.IPOD
	..Leg 60
	...DSDP Site 460
RT	Mariana Trench
SN	Mariana Trench, NW Pacific.

DSDP Site 461
BT	Deep Sea Drilling Project
	.IPOD
	..Leg 60
	...DSDP Site 461
RT	Mariana Trench
SN	Mariana Trench, NW Pacific.

DSDP Site 462
BT	Deep Sea Drilling Project
	.IPOD
	..Leg 61
	...DSDP Site 462
BT	Deep Sea Drilling Project
	.IPOD
	..Leg 89
	...DSDP Site 462
RT	Northwest Pacific
	Equatorial Pacific
	Nauru Basin
SN	N Nauru Basin, W Equatorial Pacific. Before 1982, also search Site 462 AND Deep Sea Drilling Project. This term has multiple hierarchies. Added to Thesaurus in 1985.

DSDP Site 463
BT	Deep Sea Drilling Project
	.IPOD
	..Leg 62
	...DSDP Site 463
RT	Northwest Pacific
	Mid-Pacific Mountains
SN	NW Pacific Ocean. Added to Thesaurus in 1985.

DSDP Site 464
BT	Deep Sea Drilling Project
	.IPOD
	..Leg 62
	...DSDP Site 464
RT	Northwest Pacific
	Hess Rise
SN	N Hess Rise, N central Pacific Ocean. Added to Thesaurus in 1985.

DSDP Site 465
BT	Deep Sea Drilling Project
	.IPOD
	..Leg 62
	...DSDP Site 465
RT	Northwest Pacific
	Hess Rise
SN	S Hess Rise, N central Pacific Ocean. Added to Thesaurus in 1985.

DSDP Site 466
BT	Deep Sea Drilling Project
	.IPOD
	..Leg 62
	...DSDP Site 466
RT	Northwest Pacific
	Hess Rise
SN	S Hess Rise, N central Pacific Ocean. Added to Thesaurus in 1985.

DSDP Site 467
BT	Deep Sea Drilling Project
	.IPOD
	..Leg 63
	...DSDP Site 467
RT	Northeast Pacific
SN	NE Pacific, off S California. Added to Thesaurus in 1985.

DSDP Site 468
BT	Deep Sea Drilling Project
	.IPOD
	..Leg 63
	...DSDP Site 468
RT	Northeast Pacific
SN	NE Pacific, off Baja California. Added to Thesaurus in 1985.

DSDP Site 469
BT	Deep Sea Drilling Project
	.IPOD
	..Leg 63
	...DSDP Site 469
RT	Northeast Pacific
SN	NE Pacific, off Baja California. Added to Thesaurus in 1985.

DSDP Site 47
BT	Deep Sea Drilling Project
	.Leg 6
	..DSDP Site 47
RT	Shatsky Rise
SN	Crest of Shatsky Rise, NW Pacific.

DSDP Site 470
BT	Deep Sea Drilling Project
	.IPOD
	..Leg 63
	...DSDP Site 470
RT	Northeast Pacific
SN	NE Pacific, off Baja California. Added to Thesaurus in 1985.

DSDP Site 471
BT	Deep Sea Drilling Project
	.IPOD
	..Leg 63
	...DSDP Site 471
RT	Northeast Pacific
SN	NE Pacific, off Baja California. Added to Thesaurus in 1985.

DSDP Site 472
BT	Deep Sea Drilling Project
	.IPOD
	..Leg 63
	...DSDP Site 472
RT	Northeast Pacific
SN	NE Pacific, off Baja California. Added to Thesaurus in 1985.

DSDP Site 473
BT	Deep Sea Drilling Project
	.IPOD
	..Leg 63
	...DSDP Site 473
RT	Northeast Pacific
SN	NE Pacific, off Mexico. Added to Thesaurus in 1985.

DSDP Site 474
BT	Deep Sea Drilling Project
	.IPOD
	..Leg 64
	...DSDP Site 474
RT	Northeast Pacific
SN	NE Pacific, off Mexico. Added to Thesaurus in 1985.

DSDP Site 475
BT	Deep Sea Drilling Project
	.IPOD
	..Leg 64
	...DSDP Site 475
RT	Northeast Pacific
SN	NE Pacific, off Mexico. Added to Thesaurus in 1985.

DSDP Site 476
BT	Deep Sea Drilling Project
	.IPOD
	..Leg 64
	...DSDP Site 476
RT	Northeast Pacific
SN	NE Pacific, off Mexico. Added to Thesaurus in 1985.

DSDP Site 477
BT	Deep Sea Drilling Project
	.IPOD
	..Leg 64
	...DSDP Site 477
RT	Gulf of California
SN	Gulf of California. Added to Thesaurus in 1985.

DSDP Site 478
BT	Deep Sea Drilling Project
	.IPOD
	..Leg 64
	...DSDP Site 478
RT	Gulf of California
SN	Gulf of California. Added to Thesaurus in 1985.

DSDP Site 479
BT	Deep Sea Drilling Project
	.IPOD
	..Leg 64
	...DSDP Site 479
RT	Gulf of California
SN	Gulf of California. Added to Thesaurus in 1985.

DSDP Site 48
BT	Deep Sea Drilling Project
	.Leg 6
	..DSDP Site 48
RT	Shatsky Rise
SN	Crest of Shatsky Rise, NW Pacific.

DSDP Site 480
BT	Deep Sea Drilling Project
	.IPOD
	..Leg 64
	...DSDP Site 480
RT	Gulf of California
SN	Gulf of California. Added to Thesaurus in 1985.

DSDP Site 481
BT	Deep Sea Drilling Project
	.IPOD
	..Leg 64
	...DSDP Site 481
RT	Gulf of California
SN	Gulf of California. Added to Thesaurus in 1985.

DSDP Site 482
BT	Deep Sea Drilling Project
	.IPOD
	..Leg 65
	...DSDP Site 482
RT	Gulf of California
SN	Gulf of California. Added to Thesaurus in 1985.

DSDP Site 483
BT	Deep Sea Drilling Project
	.IPOD
	..Leg 65
	...DSDP Site 483
RT	Gulf of California
SN	Gulf of California. Added to Thesaurus in 1985.

DSDP Site 484
BT	Deep Sea Drilling Project
	.IPOD
	..Leg 65
	...DSDP Site 484
RT	Gulf of California
SN	Gulf of California. Added to Thesaurus in 1985.

DSDP Site 485
BT	Deep Sea Drilling Project
	.IPOD
	..Leg 65
	...DSDP Site 485
RT	Gulf of California
SN	Gulf of California. Added to Thesaurus in 1985.

DSDP Site 49
BT	Deep Sea Drilling Project
	.Leg 6
	..DSDP Site 49
RT	Shatsky Rise
SN	W flank of Shatsky Rise, NW Pacific.

DSDP Site 494
BT	Deep Sea Drilling Project
	.IPOD
	..Leg 67
	...DSDP Site 494
RT	Northeast Pacific
	Equatorial Pacific
SN	E Equatorial Pacific, off Central America. Added to Thesaurus in 1985.

DSDP Site 495
BT	Deep Sea Drilling Project
	.IPOD
	..Leg 67
	...DSDP Site 495
RT	Northeast Pacific
	Equatorial Pacific
SN	E Equatorial Pacific, off Central America. Added to Thesaurus in 1985.

DSDP Site 496
BT	Deep Sea Drilling Project
	.IPOD
	..Leg 67
	...DSDP Site 496
RT	Northeast Pacific
	Equatorial Pacific
SN	E Equatorial Pacific, off Central America. Added to Thesaurus in 1985.

DSDP Site 497
BT	Deep Sea Drilling Project
	.IPOD
	..Leg 67
	...DSDP Site 497
RT	Northeast Pacific
	Equatorial Pacific
SN	E Equatorial Pacific, off Central America. Added to Thesaurus in 1985.

DSDP Site 498
BT	Deep Sea Drilling Project
	.IPOD
	..Leg 67
	...DSDP Site 498
RT	Northeast Pacific
	Equatorial Pacific
SN	E Equatorial Pacific, off Central America. Added to Thesaurus in 1985.

DSDP Site 499
BT	Deep Sea Drilling Project
	.IPOD
	..Leg 67
	...DSDP Site 499
RT	Northeast Pacific
	Equatorial Pacific
SN	E Equatorial Pacific, off Central America. Added to Thesaurus in 1985.

DSDP Site 5
BT	Deep Sea Drilling Project
	.Leg 1
	..DSDP Site 5
RT	North Atlantic
	Bahamas
SN	NW Atlantic, E of San Salvador, Bahamas.

DSDP Site 50
BT	Deep Sea Drilling Project
	.Leg 6
	..DSDP Site 50
RT	Shatsky Rise
SN	W flank of Shatsky Rise, NW Pacific.

DSDP Site 500
BT	Deep Sea Drilling Project
	.IPOD
	..Leg 67
	...DSDP Site 500
RT	Northeast Pacific
	Equatorial Pacific
SN	E Equatorial Pacific, off Central America. Added to Thesaurus in 1985.

DSDP Site 501
BT	Deep Sea Drilling Project
	.IPOD
	..Leg 68
	...DSDP Site 501
RT	Northeast Pacific
	Equatorial Pacific
SN	E Equatorial Pacific, off Colombia. Added to Thesaurus in 1985.

DSDP Site 502
BT	Deep Sea Drilling Project
	.IPOD
	..Leg 68
	...DSDP Site 502
RT	Caribbean Sea
SN	W Caribbean Sea, off Central America. Added to Thesaurus in 1985.

DSDP Site 503
BT	Deep Sea Drilling Project
	.IPOD
	..Leg 68
	...DSDP Site 503
RT	Northeast Pacific
	Equatorial Pacific
SN	E Equatorial Pacific, off Central America. Added to Thesaurus in 1985.

DSDP Site 504
BT	Ocean Drilling Program
	.Leg 148
	..DSDP Site 504
BT	Deep Sea Drilling Project
	.IPOD
	..Leg 69
	...DSDP Site 504
BT	Deep Sea Drilling Project
	.IPOD
	..Leg 70
	...DSDP Site 504
BT	Deep Sea Drilling Project
	.IPOD
	..Leg 83
	...DSDP Site 504
BT	Deep Sea Drilling Project
	.IPOD
	..Leg 92
	...DSDP Site 504
BT	Ocean Drilling Program
	.Leg 111
	..DSDP Site 504
BT	Ocean Drilling Program
	.Leg 137
	..DSDP Site 504
BT	Ocean Drilling Program
	.Leg 140
	..DSDP Site 504
UF	DSDP Site 504B
RT	Northeast Pacific
	Equatorial Pacific
	ODP Site 677
	ODP Site 678
SN	E Equatorial Pacific, off Colombia. These additional Legs were redrilled in Hole B. This term has multiple hierarchies. Added to Thesaurus in 1985.

DSDP Site 504B
USE	DSDP Site 504

DSDP Site 505
BT	Deep Sea Drilling Project
	.IPOD
	..Leg 69
	...DSDP Site 505
RT	Northeast Pacific
	Equatorial Pacific
SN	E Equatorial Pacific, off Colombia. Added to Thesaurus in 1985.

DSDP Site 506
BT	Deep Sea Drilling Project
	.IPOD
	..Leg 70
	...DSDP Site 506
RT	Northeast Pacific
	Equatorial Pacific
SN	E Equatorial Pacific. Added to Thesaurus in 1985.

DSDP Site 507
BT	Deep Sea Drilling Project
	.IPOD
	..Leg 70
	...DSDP Site 507
RT	Northeast Pacific
	Equatorial Pacific
SN	E Equatorial Pacific. Added to Thesaurus in 1985.

DSDP Site 508
BT	Deep Sea Drilling Project
	.IPOD
	..Leg 70
	...DSDP Site 508
RT	Northeast Pacific
	Equatorial Pacific
SN	E Equatorial Pacific. Added to Thesaurus in 1985.

DSDP Site 509
BT	Deep Sea Drilling Project
	.IPOD
	..Leg 70
	...DSDP Site 509
RT	Northeast Pacific
	Equatorial Pacific
SN	E Equatorial Pacific. Added to Thesaurus in 1985.

DSDP Site 51
BT	Deep Sea Drilling Project
	.Leg 6
	..DSDP Site 51
RT	Northwest Pacific
SN	NW Pacific, abyssal plain near Shatsky Rise. Added to Thesaurus in 1993.

DSDP Site 510
BT	Deep Sea Drilling Project
	.IPOD
	..Leg 70
	...DSDP Site 510
RT	Northeast Pacific
	Equatorial Pacific
SN	E Equatorial Pacific. Added to Thesaurus in 1985.

DSDP Site 511
BT	Deep Sea Drilling Project
	.IPOD
	..Leg 71
	...DSDP Site 511
RT	South Atlantic
SN	S Atlantic Ocean. Added to Thesaurus in 1985.

DSDP Site 512
BT	Deep Sea Drilling Project
	.IPOD
	..Leg 71
	...DSDP Site 512
RT	South Atlantic
SN	S Atlantic Ocean. Added to Thesaurus in 1985.

DSDP Site 513
BT	Deep Sea Drilling Project
	.IPOD
	..Leg 71
	...DSDP Site 513
RT	South Atlantic
SN	S Central Atlantic Ocean. Added to Thesaurus in 1985.

DSDP Site 514
BT	Deep Sea Drilling Project
	.IPOD
	..Leg 71
	...DSDP Site 514
RT	South Atlantic
SN	S Central Atlantic Ocean. Added to Thesaurus in 1985.

DSDP Site 515
BT	Deep Sea Drilling Project
	.IPOD
	..Leg 72
	...DSDP Site 515
RT	Antarctic Bottom Water
	Brazil Basin
SN	Brazil Basin, S Atlantic. Added to Thesaurus in 1989.

DSDP Site 516
BT	Deep Sea Drilling Project
	.IPOD
	..Leg 72
	...DSDP Site 516
RT	Rio Grande Rise
SN	Rio Grande Rise, SW Atlantic. Added to Thesaurus in 1989.

DSDP Site 517
BT	Deep Sea Drilling Project
	.IPOD
	..Leg 72
	...DSDP Site 517
RT	Rio Grande Rise
SN	W flank of Rio Grande Rise, SW Atlantic Ocean. Added to Thesaurus in 1989.

DSDP Site 518
BT	Deep Sea Drilling Project
	.IPOD
	..Leg 72
	...DSDP Site 518
RT	Vema Channel
SN	E flank of Vema Channel in SE Atlantic. Added to Thesaurus in 1989.

DSDP Site 519
BT	Deep Sea Drilling Project
	.IPOD
	..Leg 73
	...DSDP Site 519
RT	South Atlantic
	Mid-Atlantic Ridge
SN	Mid-Atlantic Ridge in S Atlantic. Added to Thesaurus in 1989.

DSDP Site 52
BT	Deep Sea Drilling Project
	.Leg 6
	..DSDP Site 52
RT	Northwest Pacific
SN	NW Pacific abyssal plain, E of Izu-Bonin Trench.

DSDP Site 520
BT	Deep Sea Drilling Project
	.IPOD
	..Leg 73
	...DSDP Site 520
RT	South Atlantic
	Mid-Atlantic Ridge
SN	Mid-Atlantic Ridge in S Atlantic. Added to Thesaurus in 1989.

DSDP Site 521
BT	Deep Sea Drilling Project
	.IPOD
	..Leg 73
	...DSDP Site 521
RT	South Atlantic
	Mid-Atlantic Ridge
SN	Mid-Atlantic Ridge in S Atlantic. Added to Thesaurus in 1989.

DSDP Site 522
BT	Deep Sea Drilling Project
	.IPOD
	..Leg 73
	...DSDP Site 522
RT	Angola Basin
SN	Angola Basin, SE Atlantic. Added to Thesaurus in 1989.

DSDP Site 523
BT	Deep Sea Drilling Project
	.IPOD
	..Leg 73
	...DSDP Site 523
RT	Angola Basin
	Walvis Ridge
SN	Angola Basin, just W of Walvis Ridge in S Atlantic. Added to Thesaurus in 1989.

DSDP Site 524
BT	Deep Sea Drilling Project
	.IPOD
	..Leg 73
	...DSDP Site 524
RT	Cape Basin
	Walvis Ridge
SN	Cape Basin, E of Walvis Ridge in S Atlantic. Added to Thesaurus in 1989.

DSDP Site 525
BT	Deep Sea Drilling Project
	.IPOD
	..Leg 74
	...DSDP Site 525
RT	Walvis Ridge
SN	Walvis Ridge, S Atlantic. Added to Thesaurus in 1989.

DSDP Site 526
BT	Deep Sea Drilling Project
	.IPOD
	..Leg 74
	...DSDP Site 526
RT	Walvis Ridge
SN	Walvis Ridge, S Atlantic. Added to Thesaurus in 1989.

DSDP Site 527
BT	Deep Sea Drilling Project
	.IPOD
	..Leg 74
	...DSDP Site 527
RT	Walvis Ridge
SN	Walvis Ridge, S Atlantic. Added to Thesaurus in 1989.

DSDP Site 528
BT	Deep Sea Drilling Project
	.IPOD
	..Leg 74
	...DSDP Site 528
RT	Walvis Ridge
SN	W Walvis Ridge, S Atlantic. Added to Thesaurus in 1989.

DSDP Site 529
BT	Deep Sea Drilling Project
	.IPOD
	..Leg 74
	...DSDP Site 529
RT	Walvis Ridge
SN	Walvis Ridge, S Atlantic. Added to Thesaurus in 1989.

DSDP Site 53
BT	Deep Sea Drilling Project
	.Leg 6
	..DSDP Site 53
RT	Parece Vela Basin
SN	Parece Vela Basin, flank of Iwo-Jima Ridge, central Philippine Sea.

DSDP Site 530
BT	Deep Sea Drilling Project
	.IPOD
	..Leg 75
	...DSDP Site 530
RT	Walvis Ridge
SN	N Walvis Ridge, S Atlantic. Added to Thesaurus in 1989.

DSDP Site 531
BT	Deep Sea Drilling Project
	.IPOD
	..Leg 75
	...DSDP Site 531
RT	Walvis Ridge
SN	Crest of Walvis Ridge, near coast of Africa. Added to Thesaurus in 1989.

DSDP Site 532
BT	Deep Sea Drilling Project
	.IPOD
	..Leg 75
	...DSDP Site 532
RT	Walvis Ridge
SN	Walvis Ridge, S Atlantic. Added to Thesaurus in 1989.

DSDP Site 533
BT	Deep Sea Drilling Project
	.IPOD
	..Leg 76
	...DSDP Site 533
RT	North Atlantic
SN	NW Atlantic, off Florida. Added to Thesaurus in 1985.

DSDP Site 534
BT	Deep Sea Drilling Project
	.IPOD
	..Leg 76
	...DSDP Site 534
RT	North Atlantic
SN	NW Atlantic, off Florida. Added to Thesaurus in 1985.

DSDP Site 535
BT	Deep Sea Drilling Project
	.IPOD
	..Leg 77
	...DSDP Site 535
RT	Gulf of Mexico
SN	Gulf of Mexico. Added to Thesaurus in 1989.

DSDP Site 536
BT	Deep Sea Drilling Project
	.IPOD
	..Leg 77
	...DSDP Site 536
RT	Gulf of Mexico
SN	Gulf of Mexico. Added to Thesaurus in 1989.

DSDP Site 537
BT	Deep Sea Drilling Project
	.IPOD
	..Leg 77
	...DSDP Site 537
RT	Gulf of Mexico
SN	Gulf of Mexico. Added to Thesaurus in 1989.

DSDP Site 538
BT	Deep Sea Drilling Project
	.IPOD
	..Leg 77
	...DSDP Site 538
RT	Gulf of Mexico
SN	N flank of Catoche Knoll, Gulf of Mexico. Added to Thesaurus in 1989.

DSDP Site 54
BT	Deep Sea Drilling Project
	.Leg 6
	..DSDP Site 54
RT	Parece Vela Basin
SN	Parece Vela Basin, W of Iwo-Jima Ridge, Philippine Sea.

DSDP Site 540
BT	Deep Sea Drilling Project
	.IPOD
	..Leg 77
	...DSDP Site 540
RT	Gulf of Mexico
SN	Gulf of Mexico. Added to Thesaurus in 1989.

DSDP Site 541
BT	Deep Sea Drilling Project
	.IPOD
	..Leg 78A
	...DSDP Site 541
RT	Caribbean Sea
	Barbados Ridge
	Leg 156
SN	Barbados Ridge, near border of E Caribbean Sea. Added to Thesaurus in 1989.

DSDP Site 542
BT	Deep Sea Drilling Project
	.IPOD
	..Leg 78A
	...DSDP Site 542
RT	Caribbean Sea
	Barbados Ridge
	ODP Site 675
SN	Barbados Ridge, near border of E Caribbean Sea. Added to Thesaurus in 1989.

DSDP Site 543
BT	Deep Sea Drilling Project
	.IPOD
	..Leg 78A
	...DSDP Site 543
RT	North Atlantic
	Barbados Ridge
SN	Located on Tiburon Rise, near Barbados Ridge. Added to Thesaurus in 1989.

DSDP Site 544
BT	Deep Sea Drilling Project
	.IPOD
	..Leg 79
	...DSDP Site 544
RT	Mazagan Plateau
SN	Mazagan Plateau, off NW coast of Morocco. Added to Thesaurus in 1989.

DSDP Site 545
BT	Deep Sea Drilling Project
	.IPOD
	..Leg 79
	...DSDP Site 545
RT	Mazagan Plateau
SN	Mazagan Plateau, off NW coast of Morocco. Added to Thesaurus in 1989.

DSDP Site 546
BT	Deep Sea Drilling Project
	.IPOD
	..Leg 79
	...DSDP Site 546
RT	Mazagan Plateau
SN	Mazagan Plateau, off NW coast of Morocco. Added to Thesaurus in 1989.

DSDP Site 547
BT	Deep Sea Drilling Project
	.IPOD
	..Leg 79
	...DSDP Site 547
RT	North Atlantic
	Mazagan Plateau
SN	Located to the west of the Mazagan Plateau, off the NW coast of Morocco. Added to Thesaurus in 1989.

DSDP Site 548
BT	Deep Sea Drilling Project
	.IPOD
	..Leg 80
	...DSDP Site 548
RT	Goban Spur
SN	Goban Spur, near Pendragon Escarpment in NE Atlantic. Added to Thesaurus in 1989.

DSDP Site 549
BT	Deep Sea Drilling Project
	.IPOD
	..Leg 80
	...DSDP Site 549
RT	North Atlantic
	Goban Spur
SN	Off Goban Spur, NE Atlantic. Added to Thesaurus in 1993.

DSDP Site 55
BT	Deep Sea Drilling Project
	.Leg 6
	..DSDP Site 55
RT	Northwest Pacific
SN	Caroline Ridge, SE of Mariana Arc, NW Pacific.

DSDP Site 550
BT	Deep Sea Drilling Project
	.IPOD
	..Leg 80
	...DSDP Site 550
RT	North Atlantic
	Goban Spur
SN	Located 10 km SW of Goban Spur in NE Atlantic. Added to Thesaurus in 1989.

DSDP Site 551
BT	Deep Sea Drilling Project
	.IPOD
	..Leg 80
	...DSDP Site 551
RT	North Atlantic
	Goban Spur
SN	Located about 5 km SW of Goban Spur in NE Atlantic. Added to Thesaurus in 1989.

DSDP Site 552
BT	Deep Sea Drilling Project
	.IPOD
	..Leg 81
	...DSDP Site 552
RT	Rockall Plateau
SN	W Rockall Plateau, NE Atlantic. Added to Thesaurus in 1989.

DSDP Site 553
BT	Deep Sea Drilling Project
	.IPOD
	..Leg 81
	...DSDP Site 553
RT	Rockall Plateau
SN	W Rockall Plateau, NE Atlantic. Added to Thesaurus in 1989.

DSDP Site 554
BT	Deep Sea Drilling Project
	.IPOD
	..Leg 81
	...DSDP Site 554
RT	Rockall Plateau
SN	W Rockall Plateau, NE Atlantic. Added to Thesaurus in 1989.

DSDP Site 555
BT	Deep Sea Drilling Project
	.IPOD
	..Leg 81
	...DSDP Site 555
RT	Rockall Plateau
SN	W Rockall Plateau, NE Atlantic. Added to Thesaurus in 1989.

DSDP Site 556
BT	Deep Sea Drilling Project
	.IPOD
	..Leg 82
	...DSDP Site 556
RT	North Atlantic
	Mid-Atlantic Ridge
	Azores
SN	W flank of Mid-Atlantic Ridge near the Azores, N Atlantic. Added to Thesaurus in 1989.

DSDP Site 558
BT	Deep Sea Drilling Project
	.IPOD
	..Leg 82
	...DSDP Site 558
RT	North Atlantic
	Mid-Atlantic Ridge
	Azores
SN	W flank of Mid-Atlantic Ridge about 30 miles S of Pico fracture zone, near the Azores in N Atlantic. Added to Thesaurus in 1989.

DSDP Site 56
BT	Deep Sea Drilling Project
	.Leg 6
	..DSDP Site 56
RT	Northwest Pacific
SN	Caroline Ridge, SE of Mariana Trench, NW Pacific.

DSDP Site 561
BT	Deep Sea Drilling Project
	.IPOD
	..Leg 82
	...DSDP Site 561
RT	North Atlantic
	Mid-Atlantic Ridge
	Azores
SN	W flank of Mid-Atlantic Ridge, between Hayes and Oceanographer fracture zones. Near the Azores in N Atlantic. Added to Thesaurus in 1989.

DSDP Site 562
BT	Deep Sea Drilling Project
	.IPOD
	..Leg 82
	...DSDP Site 562
RT	North Atlantic
	Mid-Atlantic Ridge
	Azores
	Hayes fracture zone
SN	W flank of Mid-Atlantic Ridge, about 60 miles S of the Hayes fracture zone. Near the Azores in N Atlantic. Added to Thesaurus in 1989.

DSDP Site 563
BT	Deep Sea Drilling Project
	.IPOD
	..Leg 82
	...DSDP Site 563
RT	North Atlantic
	Mid-Atlantic Ridge
	Azores
	Hayes fracture zone
SN	W flank of Mid-Atlantic Ridge, S of Hayes fracture zone, near the Azores in N Atlantic. Added to Thesaurus in 1989.

DSDP Site 564
BT	Deep Sea Drilling Project
	.IPOD
	..Leg 82
	...DSDP Site 564
RT	North Atlantic
	Mid-Atlantic Ridge
	Azores
	Hayes fracture zone
SN	W flank of Mid-Atlantic Ridge, S of Hayes fracture zone. Near Azores in N Atlantic. Added to Thesaurus in 1989.

DSDP Site 565
BT	Deep Sea Drilling Project
	.IPOD
	..Leg 84
	...DSDP Site 565
RT	Equatorial Pacific
	ODP Site 1040
	Middle America Trench
SN	Middle America Trench, off Nicoya Peninsula, Costa Rica, NE Pacific. Added to Thesaurus in 1993.

DSDP Site 566
BT	Deep Sea Drilling Project
	.IPOD
	..Leg 84
	...DSDP Site 566
RT	Northeast Pacific
	Middle America Trench
SN	Middle America Trench, off S Guatemala, NE Pacific.

DSDP Site 567
BT	Deep Sea Drilling Project
	.IPOD
	..Leg 84
	...DSDP Site 567
RT	Northeast Pacific
	Middle America Trench
SN	Middle America Trench off coast of Guatemala.

DSDP Site 568
BT	Deep Sea Drilling Project
	.IPOD
	..Leg 84
	...DSDP Site 568
RT	Middle America Trench
SN	Middle America Trench upper slope, off Guatemala, NE Pacific. Added to Thesaurus in 1993.

DSDP Site 57
BT	Deep Sea Drilling Project
	.Leg 6
	..DSDP Site 57
RT	Northwest Pacific
SN	Caroline Ridge, SE of Mariana Trench, NW Pacific.

DSDP Site 570
BT	Deep Sea Drilling Project
	.IPOD
	..Leg 84
	...DSDP Site 570
RT	Middle America Trench
SN	Middle America Trench upper slope, off Guatemala, NE Pacific. Added to Thesaurus in 1993.

DSDP Site 571
BT	Deep Sea Drilling Project
	.IPOD
	..Leg 85
	...DSDP Site 571
RT	Northeast Pacific
	Equatorial Pacific
SN	E Equatorial Pacific.

DSDP Site 572
BT	Deep Sea Drilling Project
	.IPOD
	..Leg 85
	...DSDP Site 572
RT	Northeast Pacific
	Equatorial Pacific
SN	E Equatorial Pacific. Added to Thesaurus in 1989.

DSDP Site 573
BT	Deep Sea Drilling Project
	.IPOD
	..Leg 85
	...DSDP Site 573
RT	Northeast Pacific
	Equatorial Pacific
SN	E Equatorial Pacific. Added to Thesaurus in 1989.

DSDP Site 574
BT	Deep Sea Drilling Project
	.IPOD
	..Leg 85
	...DSDP Site 574
RT	Northeast Pacific
	Equatorial Pacific
SN	E Equatorial Pacific. Added to Thesaurus in 1989.

DSDP Site 575
BT	Deep Sea Drilling Project
	.IPOD
	..Leg 85
	...DSDP Site 575
RT	Northeast Pacific
	Equatorial Pacific
SN	S of Clipperton fracture zone, NE Equatorial Pacific. Added to Thesaurus in 1993.

DSDP Site 576
BT	Deep Sea Drilling Project
	.IPOD
	..Leg 86
	...DSDP Site 576
RT	Northwest Pacific
SN	Located approximately 300 km E of the Shatsky Rise, NW Pacific. Added to Thesaurus in 1989.

DSDP Site 577
BT	Deep Sea Drilling Project
	.IPOD
	..Leg 86
	...DSDP Site 577
RT	Shatsky Rise
SN	W flank of Shatsky Rise, central NW Pacific. Before 1984, also search Site 577 AND Deep Sea Drilling Project. Added to Thesaurus in 1993.

DSDP Site 578
BT	Deep Sea Drilling Project
	.IPOD
	..Leg 86
	...DSDP Site 578
RT	Northwest Pacific
SN	S Northwest Pacific Basin, NW Pacific. Before 1984, also search Site 578 AND Deep Sea Drilling Project. Added to Thesaurus in 1993.

DSDP Site 579
BT	Deep Sea Drilling Project
	.IPOD
	..Leg 86
	...DSDP Site 579
RT	Northwest Pacific
SN	Central Northwest Pacific Basin. Before 1984, also search Site 579 AND Deep Sea Drilling Project. Added to Thesaurus in 1993.

DSDP Site 58
BT	Deep Sea Drilling Project
	.Leg 6
	..DSDP Site 58
RT	Northwest Pacific
SN	N flank of Caroline Ridge, SE of Mariana Trench, NW Pacific.

DSDP Site 580
BT	Deep Sea Drilling Project
	.IPOD
	..Leg 86
	...DSDP Site 580
RT	Northwest Pacific
SN	N Northwest Pacific Basin. Before 1984, also search Site 580 AND Deep Sea Drilling Project. Added to Thesaurus in 1993.

DSDP Site 581
BT	Deep Sea Drilling Project
	.IPOD
	..Leg 86
	...DSDP Site 581
BT	Deep Sea Drilling Project
	.IPOD
	..Leg 88
	...DSDP Site 581
RT	Northwest Pacific
SN	Located in Hokkaido fracture zone, NW Pacific. This term has multiple hierarchies. Added to Thesaurus in 1989.

DSDP Site 582
BT	Deep Sea Drilling Project
	.IPOD
	..Leg 87
	...DSDP Site 582
RT	Nankai Trough
SN	Off SW coast of Japan in Nankai Trough, NW Pacific Ocean. Added to Thesaurus in 1989.

DSDP Site 583
BT	Deep Sea Drilling Project
	.IPOD
	..Leg 87
	...DSDP Site 583
RT	Nankai Trough
SN	Off SW coast of Japan in Nankai Trough, NW Pacific. Added to Thesaurus in 1989.

DSDP Site 584
BT	Deep Sea Drilling Project
	.IPOD
	..Leg 87
	...DSDP Site 584
RT	Honshu
	Japan Trench
SN	Off N Honshu in Japan Trench, NW Pacific. Added to Thesaurus in 1989.

DSDP Site 585
BT	Deep Sea Drilling Project
	.IPOD
	..Leg 89
	...DSDP Site 585
RT	East Mariana Basin
SN	East Mariana Basin, NW Pacific. Added to Thesaurus in 1989.

DSDP Site 586
BT	Deep Sea Drilling Project
	.IPOD
	..Leg 89
	...DSDP Site 586
RT	Southwest Pacific
	Equatorial Pacific
	Ontong Java Plateau
SN	NE slope of Ontong Java Plateau, Equatorial Pacific. Added to Thesaurus in 1989.

DSDP Site 587
BT	Deep Sea Drilling Project
	.IPOD
	..Leg 90
	...DSDP Site 587
RT	Southwest Pacific
SN	S Landsdowne Bank, SW Pacific. Added to Thesaurus in 1989.

DSDP Site 588
BT	Deep Sea Drilling Project
	.IPOD
	..Leg 90
	...DSDP Site 588
RT	Lord Howe Rise
SN	N Lord Howe Rise, SW Pacific. Added to Thesaurus in 1989.

DSDP Site 589
BT	Deep Sea Drilling Project
	.IPOD
	..Leg 90
	...DSDP Site 589
RT	Lord Howe Rise
SN	Central Lord Howe Rise, SW Pacific. Added to Thesaurus in 1989.

DSDP Site 59
BT	Deep Sea Drilling Project
	.Leg 6
	..DSDP Site 59
RT	Northwest Pacific
SN	Abyssal plain just E of Mariana Trench, NW Pacific.

DSDP Site 590
BT	Deep Sea Drilling Project
	.IPOD
	..Leg 90
	...DSDP Site 590
RT	Lord Howe Rise
SN	Central Lord Howe Rise, SW Pacific. Added to Thesaurus in 1989.

DSDP Site 591
BT	Deep Sea Drilling Project
	.IPOD
	..Leg 90
	...DSDP Site 591
RT	Lord Howe Rise
SN	E Lord Howe Rise, SW Pacific. Added to Thesaurus in 1989.

DSDP Site 592
BT	Deep Sea Drilling Project
	.IPOD
	..Leg 90
	...DSDP Site 592
RT	Lord Howe Rise
SN	S Lord Howe Rise, SW Pacific. Added to Thesaurus in 1989.

DSDP Site 593
BT	Deep Sea Drilling Project
	.IPOD
	..Leg 90
	...DSDP Site 593
RT	Leg 29
	Challenger Plateau
	DSDP Site 284
SN	Located on Challenger Plateau, NW of New Zealand in SW Pacific. Reoccupation of DSDP Site 284 in Leg 29. Added to Thesaurus in 1989.

DSDP Site 594
BT	Deep Sea Drilling Project
	.IPOD
	..Leg 90
	...DSDP Site 594
RT	Southwest Pacific
	Chatham Rise
SN	S Chatham Rise, E of New Zealand's South Island in SW Pacific. Added to Thesaurus in 1989.

DSDP Site 595
BT	Deep Sea Drilling Project
	.IPOD
	..Leg 91
	...DSDP Site 595
RT	Southeast Pacific
	Tonga Trench
SN	E of Tonga Trench in SE Pacific. Added to Thesaurus in 1989.

DSDP Site 596
BT	Deep Sea Drilling Project
	.IPOD
	..Leg 91
	...DSDP Site 596
RT	Southeast Pacific
	Tonga Trench
SN	E of Tonga Trench in SE Pacific. Added to Thesaurus in 1989.

DSDP Site 597
BT	Deep Sea Drilling Project
	.IPOD
	..Leg 92
	...DSDP Site 597
RT	Southeast Pacific
	East Pacific Rise
	Tahiti
SN	W flank of East Pacific Rise near Tahiti. SE Pacific. Added to Thesaurus in 1989.

DSDP Site 598
BT	Deep Sea Drilling Project
	.IPOD
	..Leg 92
	...DSDP Site 598
RT	Southeast Pacific
	East Pacific Rise
	Tahiti
SN	East Pacific Rise, E of Tahiti in SE Pacific. Added to Thesaurus in 1989.

DSDP Site 599
BT	Deep Sea Drilling Project
	.IPOD
	..Leg 92
	...DSDP Site 599
RT	Southeast Pacific
	East Pacific Rise
	Tahiti
SN	East Pacific Rise, E of Tahiti in S Pacific. Added to Thesaurus in 1989.

DSDP Site 6
BT	Deep Sea Drilling Project
	.Leg 1
	..DSDP Site 6
RT	Bermuda Rise
SN	Bermuda Rise, NW Atlantic.

DSDP Site 60
BT	Deep Sea Drilling Project
	.Leg 6
	..DSDP Site 60
RT	Philippine Sea
	Mariana Trench
SN	W wall of Mariana Trench, NW Pacific.

DSDP Site 600
BT	Deep Sea Drilling Project
	.IPOD
	..Leg 92
	...DSDP Site 600
RT	Southeast Pacific
	East Pacific Rise
	Tahiti
SN	East Pacific Rise, E of Tahiti in SE Pacific. Added to Thesaurus in 1989.

DSDP Site 601
BT	Deep Sea Drilling Project
	.IPOD
	..Leg 92
	...DSDP Site 601
RT	Southeast Pacific
	East Pacific Rise
	Tahiti
SN	East Pacific Rise, E of Tahiti in SE Pacific. Added to Thesaurus in 1989.

DSDP Site 602
BT	Deep Sea Drilling Project
	.IPOD
	..Leg 92
	...DSDP Site 602
RT	Southeast Pacific
	East Pacific Rise
	Tahiti
SN	East Pacific Rise, E of Tahiti in SE Pacific. Added to Thesaurus in 1989.

DSDP Site 603
BT	Deep Sea Drilling Project
	.IPOD
	..Leg 95
	...DSDP Site 603
BT	Deep Sea Drilling Project
	.IPOD
	..Leg 93
	...DSDP Site 603
RT	North Atlantic
	Blake-Bahama Formation
	Dry Branch Formation
	Hatteras Formation
SN	About 270 miles E of Cape Hatteras, North Carolina, on lower continental rise in NW Atlantic. This term has multiple hierarchies. Added to Thesaurus in 1989.

DSDP Site 604
BT	Deep Sea Drilling Project
	.IPOD
	..Leg 93
	...DSDP Site 604
RT	North Atlantic
	Hatteras Formation
	Hudson Canyon
SN	Upper continental rise in Hudson Canyon, NW Atlantic. About 100 miles SE of Atlantic City, New Jersey. Added to Thesaurus in 1989.

DSDP Site 605
BT	Deep Sea Drilling Project
	.IPOD
	..Leg 93
	...DSDP Site 605
RT	North Atlantic
	Hatteras Formation
	Hudson Canyon
SN	Upper continental rise in Hudson Canyon, NW Atlantic. About 100 miles SE of Atlantic City, New Jersey. Added to Thesaurus in 1989.

DSDP Site 606
BT	Deep Sea Drilling Project
	.IPOD
	..Leg 94
	...DSDP Site 606
RT	North Atlantic
	Mid-Atlantic Ridge
SN	N Mid-Atlantic Ridge, WSW of the Azores, North Atlantic. Added to Thesaurus in 1993.

DSDP Site 607
BT	Deep Sea Drilling Project
	.IPOD
	..Leg 94
	...DSDP Site 607
RT	North Atlantic
	Mid-Atlantic Ridge
SN	N Mid-Atlantic Ridge area, NW of the Azores. Added to Thesaurus in 1993.

DSDP Site 608
BT	Deep Sea Drilling Project
	.IPOD
	..Leg 94
	...DSDP Site 608
RT	North Atlantic
SN	King's Trough complex area, NE Atlantic. Added to Thesaurus in 1993.

DSDP Site 609
BT	Deep Sea Drilling Project
	.IPOD
	..Leg 94
	...DSDP Site 609
RT	North Atlantic
	Mid-Atlantic Ridge
	Gibbs fracture zone
SN	E flank of Mid-Atlantic Ridge, near Gibbs fracture zone, central NE central Atlantic. Added to Thesaurus in 1993.

DSDP Site 61
BT	Deep Sea Drilling Project
	.Leg 7
	..DSDP Site 61
RT	Northwest Pacific
	Equatorial Pacific
	Mariana Trench
SN	W Equatorial Pacific, SE of the Mariana Trench. Added to Thesaurus in 1985.

DSDP Site 610
BT	Deep Sea Drilling Project
	.IPOD
	..Leg 94
	...DSDP Site 610
RT	Rockall Trough
SN	Feni Ridge, Rockall Trough, NE central Atlantic. Added to Thesaurus in 1993.

DSDP Site 611
BT	Deep Sea Drilling Project
	.IPOD
	..Leg 94
	...DSDP Site 611
RT	North Atlantic
SN	S tip of Gardar Ridge, E of Maury Channel, NW Atlantic. Added to Thesaurus in 1993.

DSDP Site 612
BT	Deep Sea Drilling Project
	.IPOD
	..Leg 95
	...DSDP Site 612
RT	North Atlantic
SN	Submarine channel, New Jersey mid-continental slope, NW Atlantic. Added to Thesaurus in 1993.

DSDP Site 613
BT	Deep Sea Drilling Project
	.IPOD
	..Leg 95
	...DSDP Site 613
RT	North Atlantic
SN	Near toe of upper continental rise wedge, New Jersey coast, NW Atlantic. Before 1985, also search Site 613 AND Deep Sea Drilling Project. Added to Thesaurus in 1993.

DSDP Site 614
BT	Deep Sea Drilling Project
	.IPOD
	..Leg 96
	...DSDP Site 614
RT	Mississippi Fan
SN	Mississippi Fan, Gulf of Mexico. Added to Thesaurus in 1989.

DSDP Site 615
BT	Deep Sea Drilling Project
	.IPOD
	..Leg 96
	...DSDP Site 615
RT	Mississippi Fan
SN	Mississippi Fan, Gulf of Mexico. Added to Thesaurus in 1989.

DSDP Site 616
BT	Deep Sea Drilling Project
	.IPOD
	..Leg 96
	...DSDP Site 616
RT	Mississippi Fan
SN	Mississippi Fan, Gulf of Mexico. Added to Thesaurus in 1989.

DSDP Site 617
BT	Deep Sea Drilling Project
	.IPOD
	..Leg 96
	...DSDP Site 617
RT	Mississippi Fan
SN	Mississippi Fan, Gulf of Mexico. Added to Thesaurus in 1989.

DSDP Site 618
BT	Deep Sea Drilling Project
	.IPOD
	..Leg 96
	...DSDP Site 618
RT	Orca Basin
SN	Orca Basin, Gulf of Mexico. Added to Thesaurus in 1989.

DSDP Site 619
BT	Deep Sea Drilling Project
	.IPOD
	..Leg 96
	...DSDP Site 619
RT	Pigmy Basin
SN	Pigmy Basin, Gulf of Mexico. Added to Thesaurus in 1989.

DSDP Site 62
BT	Deep Sea Drilling Project
	.Leg 7
	..DSDP Site 62
RT	Northwest Pacific
	Equatorial Pacific
SN	W Equatorial Pacific, N of New Guinea. Added to Thesaurus in 1985.

DSDP Site 620
BT	Deep Sea Drilling Project
	.IPOD
	..Leg 96
	...DSDP Site 620
RT	Mississippi Fan
SN	Mississippi Fan, Gulf of Mexico. Added to Thesaurus in 1989.

DSDP Site 621
BT	Deep Sea Drilling Project
	.IPOD
	..Leg 96
	...DSDP Site 621
RT	Mississippi Fan
SN	Mississippi Fan, Gulf of Mexico. Added to Thesaurus in 1989.

DSDP Site 622
BT	Deep Sea Drilling Project
	.IPOD
	..Leg 96
	...DSDP Site 622
RT	Mississippi Fan
SN	Mississippi Fan, Gulf of Mexico. Added to Thesaurus in 1989.

DSDP Site 623
BT	Deep Sea Drilling Project
	.IPOD
	..Leg 96
	...DSDP Site 623
RT	Mississippi Fan
SN	Mississippi Fan, Gulf of Mexico. Added to Thesaurus in 1989.

DSDP Site 624
BT	Deep Sea Drilling Project
	.IPOD
	..Leg 96
	...DSDP Site 624
RT	Mississippi Fan
SN	Mississippi Fan, Gulf of Mexico. Added to Thesaurus in 1989.

DSDP Site 625
SN	Not a valid term for GeoRef. For sites drilled after DSDP Site 624, see under ODP Site.

DSDP Site 63
BT	Deep Sea Drilling Project
	.Leg 7
	..DSDP Site 63
RT	Northwest Pacific
	Equatorial Pacific
SN	W Equatorial Pacific, N of New Guinea. Added to Thesaurus in 1985.

DSDP Site 64
BT	Deep Sea Drilling Project
	.Leg 7
	..DSDP Site 64
RT	Southwest Pacific
	Equatorial Pacific
SN	W Equatorial Pacific, N of the Solomon Islands. Added to Thesaurus in 1985.

DSDP Site 65
BT	Deep Sea Drilling Project
	.Leg 7
	..DSDP Site 65
RT	Northwest Pacific
	Equatorial Pacific
SN	Central Equatorial Pacific, N of Kiribati. Added to Thesaurus in 1985.

DSDP Site 66
BT	Deep Sea Drilling Project
	.Leg 7
	..DSDP Site 66
RT	Northeast Pacific
	Equatorial Pacific
SN	Central Equatorial Pacific, near Line Islands. Added to Thesaurus in 1985.

DSDP Site 67
BT	Deep Sea Drilling Project
	.Leg 7
	..DSDP Site 67
RT	Northeast Pacific
SN	N central Pacific Ocean, N of Hawaii. Added to Thesaurus in 1985.

DSDP Site 68
BT	Deep Sea Drilling Project
	.Leg 8
	..DSDP Site 68
RT	Northeast Pacific
	Equatorial Pacific
	Clipperton fracture zone
SN	E and NE of Line Islands-Johnson Island ridge, SW of Hawaiian Ridge, central Pacific. Added to Thesaurus in 1995.

DSDP Site 69
BT	Deep Sea Drilling Project
	.Leg 8
	..DSDP Site 69
RT	Northeast Pacific
	Equatorial Pacific
SN	Central Equatorial Pacific, between Hawaii and Line Islands. Added to Thesaurus in 1985.

DSDP Site 7
BT	Deep Sea Drilling Project
	.Leg 1
	..DSDP Site 7
RT	North Atlantic
	Bermuda Rise
SN	Bermuda Rise, NW Atlantic.

DSDP Site 70
BT	Deep Sea Drilling Project
	.Leg 8
	..DSDP Site 70
RT	Northeast Pacific
	Equatorial Pacific
SN	NE Equatorial Pacific, near Clipperton fracture zone. Added to Thesaurus in 1985.

DSDP Site 71
BT	Deep Sea Drilling Project
	.Leg 8
	..DSDP Site 71
RT	Northeast Pacific
	Equatorial Pacific
SN	E Equatorial Pacific, near Clipperton fracture zone. Added to Thesaurus in 1985.

DSDP Site 72
BT	Deep Sea Drilling Project
	.Leg 8
	..DSDP Site 72
RT	Northeast Pacific
	Equatorial Pacific
SN	E Equatorial Pacific, N of Marquesas Islands. Added to Thesaurus in 1985.

DSDP Site 73
BT	Deep Sea Drilling Project
	.Leg 8
	..DSDP Site 73
RT	Southeast Pacific
	Equatorial Pacific
SN	E Equatorial Pacific, N of Marquesas Islands. Added to Thesaurus in 1985.

DSDP Site 74
BT	Deep Sea Drilling Project
	.Leg 8
	..DSDP Site 74
RT	Southeast Pacific
	Equatorial Pacific
SN	E Equatorial Pacific, NE of Marquesas Islands. Added to Thesaurus in 1985.

DSDP Site 75
BT	Deep Sea Drilling Project
	.Leg 8
	..DSDP Site 75
RT	Southeast Pacific
	Equatorial Pacific
SN	E Equatorial Pacific, E of Marquesas Islands. Added to Thesaurus in 1985.

DSDP Site 76
BT	Deep Sea Drilling Project
	.Leg 9
	..DSDP Site 76
RT	Southeast Pacific
SN	N of Tuomotu Islands, SE Pacific.

DSDP Site 77
BT	Deep Sea Drilling Project
	.Leg 9
	..DSDP Site 77
RT	Northeast Pacific
	Equatorial Pacific
SN	E Equatorial Pacific, NE of Marquesas Islands. Before 1985, also search Site 77 AND Deep Sea Drilling Project. Added to Thesaurus in 1985.

DSDP Site 78
BT	Deep Sea Drilling Project
	.Leg 9
	..DSDP Site 78
RT	Northeast Pacific
	Equatorial Pacific
SN	N of Clipperton fracture zone, NE Equatorial Pacific.

DSDP Site 79
BT	Deep Sea Drilling Project
	.Leg 9
	..DSDP Site 79
RT	Northeast Pacific
	Equatorial Pacific
SN	NE Equatorial Pacific, W of the East Pacific Rise.

DSDP Site 8
BT	Deep Sea Drilling Project
	.Leg 2
	..DSDP Site 8
RT	Hatteras abyssal plain
SN	NW of Bermuda, NW Atlantic.

DSDP Site 80
BT	Deep Sea Drilling Project
	.Leg 9
	..DSDP Site 80
RT	Southeast Pacific
	Equatorial Pacific
SN	E Equatorial Pacific, W of the East Pacific Rise.

DSDP Site 81
BT	Deep Sea Drilling Project
	.Leg 9
	..DSDP Site 81
RT	Northeast Pacific
	Equatorial Pacific
SN	NE Equatorial Pacific, W of the East Pacific Rise.

DSDP Site 82
BT	Deep Sea Drilling Project
	.Leg 9
	..DSDP Site 82
RT	Northeast Pacific
	Equatorial Pacific
SN	NE Equatorial Pacific, W of the East Pacific Rise.

DSDP Site 83
BT	Deep Sea Drilling Project
	.Leg 9
	..DSDP Site 83
RT	Equatorial Pacific
	Guatemala Basin
SN	Guatemala Basin, E Equatorial Pacific, E of the East Pacific Rise.

DSDP Site 84
BT	Deep Sea Drilling Project
	.Leg 9
	..DSDP Site 84
RT	Northeast Pacific
	Equatorial Pacific
SN	NE Equatorial Pacific.

DSDP Site 85
BT	Deep Sea Drilling Project
	.Leg 10
	..DSDP Site 85
RT	Campeche Scarp
SN	Campeche Scarp. Added to Thesaurus in 1985.

DSDP Site 86
BT	Deep Sea Drilling Project
	.Leg 10
	..DSDP Site 86
RT	Campeche Scarp
SN	Campeche Scarp. Added to Thesaurus in 1985.

DSDP Site 87
BT	Deep Sea Drilling Project
	.Leg 10
	..DSDP Site 87
RT	Gulf of Mexico
SN	Sigsbee abyssal plain, W central Gulf of Mexico.

DSDP Site 88
BT	Deep Sea Drilling Project
	.Leg 10
	..DSDP Site 88
RT	Campeche Scarp
SN	Campeche Scarp. Added to Thesaurus in 1985.

DSDP Site 89
BT	Deep Sea Drilling Project
	.Leg 10
	..DSDP Site 89
RT	Gulf of Mexico
	Campeche Scarp
SN	Bay of Campeche, at foot of Campeche Scarp. Added to Thesaurus in 1985.

DSDP Site 9
BT	Deep Sea Drilling Project
	.Leg 2
	..DSDP Site 9
RT	Bermuda Rise
SN	E flank, Bermuda Rise, NW Atlantic.

DSDP Site 90
BT	Deep Sea Drilling Project
	.Leg 10
	..DSDP Site 90
RT	Gulf of Mexico
SN	W Gulf of Mexico. Added to Thesaurus in 1985.

DSDP Site 91
BT	Deep Sea Drilling Project
	.Leg 10
	..DSDP Site 91
RT	Sigsbee Deep
SN	Sigsbee Deep. Added to Thesaurus in 1985.

DSDP Site 92
BT	Deep Sea Drilling Project
	.Leg 10
	..DSDP Site 92
RT	Gulf of Mexico
SN	Central Gulf of Mexico. Added to Thesaurus in 1985.

DSDP Site 93
BT	Deep Sea Drilling Project
	.Leg 10
	..DSDP Site 93
RT	Campeche Scarp
SN	Incised canyon on Campeche Scarp, W central Gulf of Mexico.

DSDP Site 94
BT	Deep Sea Drilling Project
	.Leg 10
	..DSDP Site 94
RT	Campeche Scarp
SN	Campeche Scarp. Added to Thesaurus in 1985.

DSDP Site 95
BT	Deep Sea Drilling Project
	.Leg 10
	..DSDP Site 95
RT	Gulf of Mexico
SN	E Gulf of Mexico. Added to Thesaurus in 1985.

DSDP Site 96
BT	Deep Sea Drilling Project
	.Leg 10
	..DSDP Site 96
RT	Gulf of Mexico
SN	E Gulf of Mexico, NW of Cuba. Added to Thesaurus in 1985.

DSDP Site 97
BT	Deep Sea Drilling Project
	.Leg 10
	..DSDP Site 97
RT	Gulf of Mexico
SN	E Gulf of Mexico, NW of Cuba. Added to Thesaurus in 1985.

DSDP Site 98
BT	Deep Sea Drilling Project
	.Leg 11
	..DSDP Site 98
RT	Bahamas
	Northeast Providence Channel
SN	Northeast Providence Channel, Bahamas. Added to Thesaurus in 1995.

dspeth County Texas
NT	Quitman Mountains

DSS
USE	deep seismic sounding

DST (drill stem tests)
USE	drill stem tests

DTA data
UF	differential thermal analysis data
RT	endothermic reactions
	differential thermal analysis
	data
	thermal analysis

DTM
SN	Not a valid term for GeoRef. See digital terrain models.

du

Du Page County Illinois
BT	United States
	.Illinois
	..Du Page County Illinois

Dubai
BT	Asia
	.Arabian Peninsula
	..United Arab Emirates
	...Dubai
SN	Emirate. One of federation of 7 states at S end of Persian Gulf.

Dublin Ireland
BT	Europe
	.Western Europe
	..Ireland
	...Dublin Ireland
SN	County and city on Irish Sea in E Ireland.

Dubois County Indiana
BT	Indiana
	.Dubois County Indiana

Dubuque County Iowa
BT	United States
	.Iowa
	..Dubuque County Iowa

Dubuque Format

Dubuque Formation
BT	Chronostratigraphic Units
	.Phanerozoic
	..Paleozoic
	...Ordovician
	....Middle Ordovician
	.....Dubuque Formation
RT	Iowa
	Illinois
	Wisconsin
	Minnesota
SN	NW Illinois, E Iowa, SE Minnesota and SW Wisconsin. Added to Thesaurus in 1989.

Duchesne County Utah
BT	United States
	.Utah
	..Duchesne County Utah
SN	NE Utah.

Duchesne River For

Duchesne River Formation
BT	Chronostratigraphic Units
	.Phanerozoic
	..Cenozoic
	...Paleogene
	....Duchesne River Formation
RT	Eocene
	Oligocene
	Utah
	Colorado
SN	Eocene or Oligocene. Unconformably underlies Bishop Conglomerate; unconformably overlies Uinta and Uinta (?) Formation. NW Colorado and NE Utah. Indexed with ages as applicable.

Duck North Carolina
BT	United States
	.North Carolina
	..Dare County North Carolina
	...Duck North Carolina
RT	Outer Banks
SN	Locale on Bodie Island, North Carolina's Outer Banks. Indexed with Outer Banks if applicable.

Ducktown Tennessee
BT	United States
	.Tennessee
	..Polk County Tennessee
	...Ducktown Tennessee
SN	Town in extreme SE Tennessee.

ductile deformation
BT	deformation
	.ductile deformation
RT	engineering geology
	rock mechanics
	mechanical properties
	ductility
	fracture strength
SN	Added to Thesaurus in 1989.

ductility
RT	deformation
	ductile deformation
	rock mechanics

Dudley England
BT	Europe
	.Western Europe
	..United Kingdom
	...Great Britain
	....England
	.....Dudley England
RT	Midlands
	Northumberland England
	Staffordshire England
SN	Town SW of Birmingham in West Midlands, W central England. Also occurs in other locations. Indexed with county as applicable.

Duero Basin
BT	Europe
	.Southern Europe
	..Iberian Peninsula
	...Duero Basin
RT	Spain
	Portugal
	Duero River
SN	Added to Thesaurus in 1981.

Duero River
BT	Europe
	.Southern Europe
	..Iberian Peninsula
	...Duero River
UF	Douro River
RT	Spain
	Portugal
	Duero Basin
SN	River in Spain and Portugal. Rises in central Spain, flows W to NE Portugal, then S along border, and W to Atlantic Ocean. Added to Thesaurus in 1985.

Dufek Intrusion
BT	Antarctica
	.Dufek Intrusion
RT	Pensacola Mountains
SN	In the Dufek Massif area of Forrestal Range in the Pensacola Mountains of Edith Ronne Land S of the Weddell Sea.

Dufferin County Ontario
BT	Canada
	.Eastern Canada
	..Ontario
	...Dufferin County Ontario

dufrenoysite
BT	sulfosalts
	.sulfarsenites
	..dufrenoysite

Dugger Formation
BT	Chronostratigraphic Units
	.Phanerozoic
	..Paleozoic
	...Carboniferous
	....Pennsylvanian
	.....Middle Pennsylvanian
	......Dugger Formation
RT	Indiana
SN	SE Indiana. Added to Thesaurus in 1989.

Dukes County Massachusetts
BT	United States
	.Massachusetts
	..Dukes County Massachusetts

Dukla Poland
BT	Europe
	.Central Europe
	..Poland
	...Dukla Poland
SN	Town in Krosno Province, SE Poland.

Duluth Complex
BT	United States
	.Minnesota
	..Duluth Complex
RT	Precambrian
SN	In NE Minnesota. Indexed with counties as applicable.

Duluth Minnesota
BT	United States
	.Minnesota
	..Saint Louis County Minnesota
	...Duluth Minnesota
SN	City at extreme W end of Lake Superior in NE Minnesota.

dumortierite
BT	silicates
	.orthosilicates
	..nesosilicates
	...dumortierite

Duna River
USE	Danube River

Dunai River
USE	Danube River

Dunantul
USE	Transdanubia

Dunarea River
USE	Danube River

Dunau River
USE	Danube River

Dunbarton

Dunbarton Basin
BT	United States
	.Dunbarton Basin
RT	South Carolina
	Savannah River Plant
	Georgia
	Atlantic Coastal Plain
	Savannah River
SN	Buried Triassic basin, Savannah River valley, Georgia and South Carolina. Indexed with counties as applicable.

Dundas County Ontario
BT	Canada
	.Eastern Canada
	..Ontario
	...Dundas County Ontario

Dundee Limestone
BT	Chronostratigraphic Units
	.Phanerozoic
	..Paleozoic
	...Devonian
	....Middle Devonian
	.....Dundee Limestone
RT	Ontario
	Ohio
	Michigan
SN	S Michigan, N Ohio and S Ontario. Added to Thesaurus in 1989.

Dundee Scotland
BT	Europe
	.Western Europe
	..United Kingdom
	...Great Britain
	....Scotland
	.....Dundee Scotland
RT	Angus Scotland
SN	City in Angus County, Tayside region, on Firth of Tay on North Sea.

Dunderberg Shale
BT	Chronostratigraphic Units
	.Phanerozoic
	..Paleozoic
	...Cambrian
	....Upper Cambrian
	.....Dunderberg Shale
RT	Utah
	California
	Nevada
	Nopah Formation
SN	In Nopah Formation. Added to Thesaurus in 1989.

Dundy County Nebraska
BT	United States
	.Nebraska
	..Dundy County Nebraska

dune rock
USE	eolianite

dune structures
BT	sedimentary structures
	.bedding plane irregularities
	..dune structures
RT	dunes
SN	Before 1984, search dunes AND sedimentary structures. Added to Thesaurus in 1984.

Dunedin New Zealand
BT	Australasia
	.New Zealand
	..Otago New Zealand
	...Dunedin New Zealand
RT	South Island
SN	City on Pacific Ocean in SE South Island. Also index South Island.

dunes
NT	barchans
	coastal dunes
	continental dunes
	foredunes
	submarine dunes
UF	sand dunes
RT	geomorphology
	eluvium
	antidunes
	bedding plane irregularities
	sand waves
	eolian features
	shore features
	sand ridges
	blowouts
	ergs
	sand seas
	sand sheets
	dune structures
SN	As of 1984, use dune structures for the sedimentary structure.

Dunham Dolomite
BT	Chronostratigraphic Units
	.Phanerozoic
	..Paleozoic
	...Cambrian
	....Lower Cambrian
	.....Dunham Dolomite
RT	Quebec
	Vermont
SN	S Quebec; NW and W central Vermont. Added to Thesaurus in 1989.

dunite
BT	igneous rocks
	.plutonic rocks
	..ultramafics
	...peridotites
	....dunite

Dunkard Basin
BT	United States
	.Dunkard Basin
RT	Ohio
	Pennsylvania
	West Virginia
SN	In West Virginia, Ohio, and Pennsylvania. Structural basin. Indexed with states as applicable.

Dunkard Group
BT	Chronostratigraphic Units
	.Phanerozoic
	..Paleozoic
	...Dunkard Group
RT	Permian
	Pennsylvanian
	Ohio
	Pennsylvania
	Maryland
	West Virginia
SN	Pennsylvanian and Permian. Includes Washington and Greene formations. W Maryland, E Ohio, SW Pennsylvania, and N West Virginia. Indexed with ages as applicable.

Dunkerque France
USE	Dunkirk France

Dunkirk France
BT	Europe
	.Western Europe
	..France
	...Nord France
	....Dunkirk France
UF	Dunkerque France
SN	City at S end of North Sea.

Dunklin County Missouri
BT	United States
	.Missouri
	..Dunklin County Missouri

Dunlin Group
BT	Chronostratigraphic Units
	.Phanerozoic
	..Mesozoic
	...Jurassic
	....Lower Jurassic
	.....Dunlin Group
RT	North Sea
SN	Includes Drake Formation, Cook Formation, Burton Formation, and Amundsen Formation. Added to Thesaurus in 1995.

Dunn County North Dakota
BT	United States
	.North Dakota
	..Dunn County North Dakota
SN	W central North Dakota.

Dunn County Wisconsin
BT	United States
	.Wisconsin
	..Dunn County Wisconsin
SN	W Wisconsin.

Dunnage Melange
RT	Dunnage Zone
	Eastern Canada
	Newfoundland
SN	North-central Newfoundland. Before 1998, this was often used for the larger area of the Dunnage Zone. Indexed with Canadian provinces or regions as applicable.

Dunnage Terrane
USE	Dunnage Zone

Dunnage Zone
UF	Dunnage Terrane
RT	Quebec
	Appalachians
	Eastern Canada
	Maine
	Scotland
	Ireland
	Newfoundland
	New England
	Caledonides
	Dunnage Melange
	Iapetus
SN	Or 'terrane', Appalachian Orogen. Tectonostratigraphic zone including the Dunnage Melange of north-central Newfoundland, it is now sometimes extended to the New England Appalachians, and the Caledonides of N Ireland, and Scotland. Remains of the Iapetus O

Dunvegan Formation
BT	Chronostratigraphic Units
	.Phanerozoic
	..Mesozoic
	...Cretaceous
	....Upper Cretaceous
	.....Cenomanian
	......Dunvegan Formation
RT	Alberta
	British Columbia
	Yukon Territory
	Northwest Territories
SN	W Canada. At one time referred to as Fort Nelson Formation in the Liard River region. Added to Thesaurus in 1995.

Duperow Formation
BT	Chronostratigraphic Units
	.Phanerozoic
	..Paleozoic
	...Devonian
	....Upper Devonian
	.....Duperow Formation
RT	Saskatchewan
	Montana
	North Dakota
	Manitoba
	South Dakota
	Jefferson Group
SN	In Jefferson Group. North Dakota, NE Montana, NW South Dakota, Manitoba and Saskatchewan. Added to Thesaurus in 1985.

duplexes
RT	bedding faults
	decollement
	en echelon faults
	fault zones
	faults
	imbricate tectonics
	klippen
	thrust faults
SN	Before 1993, also search duplex fault zones and duplex structures if applicable. Added to Thesaurus in 1993.

Duplin County North Carolina
BT	United States
	.North Carolina
	..Duplin County North Carolina

Duplin Formation
BT	Chronostratigraphic Units
	.Phanerozoic
	..Cenozoic
	...Neogene
	....Miocene
	.....upper Miocene
	......Duplin Formation
RT	South Carolina
	Florida
	North Carolina
	Georgia
SN	Base of Duplin is an unconformity. Florida, E Georgia, E North Carolina, and E South Carolina.

durability
RT	degradation
	engineering properties
	mechanical properties
	rock mechanics
	soil mechanics
SN	Used in engineering studies. Added to Thesaurus in 1989.

durain
BT	macerals
	.durain
BT	lithotypes
	.durain
SN	This term has multiple hierarchies.

Durance Basin
BT	Europe
	.Western Europe
	..France
	...Durance Basin
SN	River basin in SE France.

Durance France
BT	Europe
	.Western Europe
	..France
	...Lot-et-Garonne France
	....Durance France
SN	Village in SW France.

Durango Mexico
BT	Mexico
	.Durango Mexico
NT	Mapimi Mexico
RT	Guerrero Terrane
	Sierra Madre Occidental
SN	State in W central Mexico. Also a city.

Durban South Africa
BT	Africa
	.Southern Africa
	..South Africa
	...KwaZulu-Natal South Africa
	....Durban South Africa
SN	City on the Indian Ocean.

Durham County North Carolina
BT	United States
	.North Carolina
	..Durham County North Carolina
SN	N central North Carolina.

Durham England
BT	Europe
	.Western Europe
	..United Kingdom
	...Great Britain
	....England
	.....Durham England
RT	Ingleton England
SN	County in NE England. In 1974, parts of Durham went to form Cleveland County and Tyne and Wear County.

duricrust
BT	sedimentary rocks
	.chemically precipitated rocks
	..duricrust
RT	soils
	weathering
	calcrete
	caliche
	weathering crust
	ferricrete
	silcrete

Dushambe Tajikistan
USE	Dushanbe Tajikistan

Dushanbe Tajikistan
BT	Asia
	.Tajikistan
	..Dushanbe Tajikistan
UF	Dushambe Tajikistan
	Stalinabad Tajikistan
RT	Nurek Tajikistan
SN	City in W Tajikistan. This term has multiple hierarchies.

dust
BT	sediments
	.clastic sediments
	..dust
RT	atmospheric transport
	volcanic ash
	terrigenous materials
	cosmic dust
	dust storms
	deflation
	interplanetary dust

dust clouds
SN	Use dust storms or planetesimals or ash clouds if applicable.

dust clouds (volcanic)
USE	ash clouds

dust storms
RT	atmospheric transport
	dust
	storms
SN	Also search dust clouds NOT extraterrestrial geology if applicable.

Dutch East Indies
USE	Indonesia

Dutch Guiana
USE	Surinam

Dutch New Guinea
USE	Irian Jaya Indonesia

Dutch West Indies
USE	Netherlands Antilles

Dutchess County New York
BT	United States
	.New York
	..Dutchess County New York
SN	SE New York.

Duval County Florida
BT	United States
	.Florida
	..Duval County Florida
SN	On the Atlantic Ocean in NE Florida.

Duval County Texas
BT	United States
	.Texas
	..Duval County Texas
SN	S Texas.

Duwi Formation
BT	Chronostratigraphic Units
	.Phanerozoic
	..Mesozoic
	...Cretaceous
	....Upper Cretaceous
	.....Duwi Formation
RT	Egypt
SN	Added to Thesaurus in 1989.

DVDP
USE	Dry Valley Drilling Project

Dvina River
BT	Europe
	.Dvina River
RT	Latvia
	Belarus
SN	The Western Dvina River which flows into the Gulf of Riga. As of 1995, use Northern Dvina River for the river which flows into the White Sea Basin in the Russian Federation. Indexed with former Soviet republics as applicable.

Dwyka Formation
BT	Chronostratigraphic Units
	.Phanerozoic
	..Paleozoic
	...upper Paleozoic
	....Dwyka Formation
UF	Dwyka Series
	Dwyka Tillite
RT	Triassic
	Carboniferous
	Permian
	Africa
	Karroo Supergroup
	South Africa
	Botswana
	Namibia
	Zimbabwe
SN	Of the Karroo Supergroup. Formerly referred to as Dwyka Series which included Upper Shales, Conglomerate (now Tillite), and Lower Shales. Indexed with ages as applicable. Added to Thesaurus in 1993.

Dwyka Series
USE	Dwyka Formation

Dwyka Tillite
USE	Dwyka Formation

Dy
USE	dysprosium

dye tracers
RT	fluorescence
	fluorimetry
	ground water
	hydrogeology
	hydrology
	surface water
	tracers
SN	Added to Thesaurus in 1982.

Dyer County Tennessee
BT	United States
	.Tennessee
	..Dyer County Tennessee

Dyfed Wales
BT	Europe
	.Western Europe
	..United Kingdom
	...Great Britain
	....Wales
	.....Dyfed Wales
NT	Cardiganshire Wales
	Carmarthenshire Wales
	Llandovery Wales
	Pembrokeshire Wales
RT	Cardigan Bay
	South Wales
SN	Welsh county formed in 1974 from Cardiganshire, Pembrokeshire and Carmarthenshire. Before 1978, also search Cardigan County, Pembroke or Pembroke County, and Carmarthen County where applicable. Also search Cardiganshire, Pembrokeshire, and Carmarthenshire

dykes
USE	dikes

dynamic
SN	A valid term through 1977.

dynamic loading
BT	loading
	.dynamic loading
RT	rock mechanics
	soil mechanics
	deformation
	dynamics
	load pressure
SN	Added to Thesaurus in 1985.

dynamic metamorphism
BT	metamorphism
	.dynamic metamorphism
RT	regional metamorphism
	retrograde metamorphism
SN	Before 1978, also search metamorphism AND dynamic.

dynamic properties
RT	dynamics
	elastodynamic properties
	properties
SN	Added to Thesaurus in 1981.

dynamics
RT	beach profiles
	dynamic loading
	dynamic properties
	geodynamics
	kinetics
	shorelines
	soil dynamics
	static corrections

dynamo theory
USE	dynamos

dynamos
UF	dynamo theory
	geodynamo
RT	geophysics
	magnetic field
	Earth
	core
	interior
	patterns
SN	Concept used to explain the presence and behavior of magnetic field on planetary bodies such as the Earth. Added to Thesaurus in 1989.

dyscrasite
BT	antimonides
	.dyscrasite

dysprosium
BT	metals
	.rare earths
	..dysprosium
UF	Dy

Dzereg Mongolia
USE	Altan Teeli Mongolia

Dzhagdy Range
BT	Commonwealth of Independent States
	.Russian Federation
	..Dzhagdy Range
BT	Asia
	.Dzhagdy Range
RT	Russian Far East
	Khabarovsk Russian Federation
SN	NW of Komsomolsk in Khabarovsk Kray in Russian Far East. This term has multiple hierarchies.

Dzhezkazgan Kazakhstan
BT	Commonwealth of Independent States
	.Kazakhstan
	..Karaganda Kazakhstan
	...Dzhezkazgan Kazakhstan
RT	Ulu-Tau
SN	Town in Karaganda Oblast in central Kazakhstan. This term has multiple hierarchies.

Dzhida River
BT	Commonwealth of Independent States
	.Russian Federation
	..Dzhida River
BT	Asia
	.Dzhida River
RT	Buryat Russian Federation
SN	S of Lake Baikal in Buryatia. This term has multiple hierarchies.

Dzhugdzhur region
BT	Commonwealth of Independent States
	.Russian Federation
	..Dzhugdzhur region
BT	Asia
	.Dzhugdzhur region
RT	Okhotsk region
SN	Borders the Okhotsk Sea and includes the Dzhugdzhur Range. This term has multiple hierarchies. Added to Thesaurus in 1981.

Dzhungaria
USE	Junggar

Dzhungarian Alatau
BT	Asia
	.Tien Shan
	..Dzhungarian Alatau
UF	Dzungar Alatau
	Dzungarian Ala-Tau
	Dzungarian Alatau
RT	Kazakhstan
	Xinjiang China
SN	Northernmost branch of the Tien Shan. Indexed with Kazakhstan and/or Xinjiang China as applicable.

Dzirula Massif
BT	Europe
	.Georgian Republic
	..Dzirula Massif
SN	Central Georgian Republic.

Dzungar Alatau
USE	Dzhungarian Alatau

Dzungaria
USE	Junggar

Dzungarian Ala-Tau
USE	Dzhungarian Alatau

Dzungarian Alatau
USE	Dzhungarian Alatau