Scientific Earth Drilling Information Service - SEDIS

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Ge
USE	germanium

geanticlines
RT	anticlines
	anticlinoria
	folds
	geosynclines
	synclinoria
	tectonics

geanticlines#geometry#geosynclines#horizontal orientation#interference patterns#

Geary County Kansas
BT	United States
	.Kansas
	..Geary County Kansas
SN	E central Kansas.

Geauga County Ohio
BT	United States
	.Ohio
	..Geauga County Ohio
SN	NE Ohio.

Gedinnian
BT	Chronostratigraphic Units
	.Phanerozoic
	..Paleozoic
	...Devonian
	....Lower Devonian
	.....Gedinnian
SN	Europe. Above Ludlovian (Silurian), below Siegenian.

gedrite
BT	silicates
	.chain silicates
	..amphibole group
	...orthoamphibole
	....gedrite
RT	amosite
	anthophyllite

gehlenite
BT	silicates
	.orthosilicates
	..sorosilicates
	...melilite group
	....gehlenite

Gehrden Germany
BT	Europe
	.Central Europe
	..Germany
	...Lower Saxony Germany
	....Gehrden Germany
SN	Town in SE central Lower Saxony.

geikielite
BT	oxides
	.geikielite
RT	titanium oxides

Geirud Formation
BT	Chronostratigraphic Units
	.Phanerozoic
	..Paleozoic
	...Geirud Formation
RT	Devonian
	Carboniferous
	Permian
	Iran
	Elburz
SN	Upper Devonian, Carboniferous and possibly Lower Permian. Central Elburz Mountains in N Iran. Indexed with ages as applicable.

Geisel River valley
USE	Geisel Valley

Geisel Valley
BT	Europe
	.Central Europe
	..Germany
	...Geisel Valley
UF	Geisel River valley
RT	Saxony-Anhalt Germany
	Thuringia Germany
SN	River valley in NE Germany.

Gelasian
BT	Chronostratigraphic Units
	.Phanerozoic
	..Cenozoic
	...Neogene
	....Pliocene
	.....Gelasian

gelifluction
UF	congelifluction
	gelifluxion
RT	soil mechanics
	frost action
	periglacial features
SN	Indicates periglacial origin by soil flow. Added to Thesaurus in 1989.

gelifluxion
USE	gelifluction

gelifraction
USE	congelifraction

gelisol
USE	frozen ground

geliturbation
USE	cryoturbation

gelivation
USE	congelifraction

gelivity
USE	congelifraction

Gellnare
USE	Gallivare Sweden

gels
BT	colloidal materials
	.gels
RT	thixotropy

Gem County Idaho
BT	United States
	.Idaho
	..Gem County Idaho

Gemer
SN	No longer a valid term for GeoRef. Use Gemer Slovakia for the village or Spis-Gemer for the mountains as applicable.

Gemer Slovakia
BT	Europe
	.Central Europe
	..Slovakia
	...Gemer Slovakia
RT	Spis-Gemer
SN	Village in S central Slovakia. Before 1995, Gemer Czechoslovakia was also used.

gems
UF	gemstones
RT	diamonds
	minerals
	agate
	chalcedony
	peristerite
	garnet group
	corundum
	amethyst
	jade
	aquamarine
	beryl
	pearls
	emerald
	tourmaline
	diamond
	carnelian
	onyx
	turquoise
	rubies
	sapphire
	zircon
	kunzite
	lazurite
	moonstone
	peridot
	topaz
SN	See also specific gems. Commodity. See List C.

gemstones
USE	gems

general cir

general circulation models
UF	global circulation models
RT	atmosphere
	climate
	models
	simulation
	circulation
	paleoclimatology
	climatic controls
	global change
	global warming
	GENESIS model
SN	Sometimes the acronym GCM is used. Often out-of-scope for GeoRef. Used to describe or compare paleoclimatic conditions or modern comparisons with past conditions. Added to Thesaurus in 1995.

General Earthquake Observation System
USE	GEOS

generation
SN	As of 1981, no longer a valid term for GeoRef. See genesis or propagation.

Genesee County Michigan
BT	United States
	.Michigan
	..Michigan Lower Peninsula
	...Genesee County Michigan
SN	SE central Michigan.

Genesee County New York
BT	United States
	.New York
	..Genesee County New York
SN	W New York.

Genesee Group
BT	Chronostratigraphic Units
	.Phanerozoic
	..Paleozoic
	...Devonian
	....Genesee Group
RT	Virginia
	Pennsylvania
	New York
	Maryland
	West Virginia
SN	Middle and Upper Devonian. Comprises Geneseo Shale with Genundewa Limestone Lentil, Standish Flagstone, and West River Shale, Penn Yan Shale, Sherburne Flagstone, Renwick Shale, Ithaca Member. Maryland, New York, Pennsylvania, western Virginia and norther

Genesee River
BT	United States
	.Genesee River
RT	Pennsylvania
	New York
	Allegany County New York
	Livingston County New York
	Monroe County New York
	Potter County Pennsylvania
SN	Allegany, Livingston and Monroe counties, W New York; Potter County, N Pennsylvania. Indexed with states and counties as applicable. Added to Thesaurus in 1989.

genesis
RT	crystallization
	diwa-type deposits
	humification
	mineral deposits, genesis
	paragenesis
	pedogenesis
	podzolization
	provenance
SN	Before 1974, also search petrogenesis if applicable.

GENESIS model
RT	atmosphere
	climate
	general circulation models
	models
SN	Includes use for National Center for Atmospheric Research general circulation model which is an updated, modified version of the NCAR CCM1 or community climate model Version 1. Added to Thesaurus in 1998.

genetic algorithms
BT	algorithms
	.genetic algorithms
RT	computer programs
	data processing
	mathematical methods
	neural networks
	mathematical models

Geneva County Alabama
BT	United States
	.Alabama
	..Geneva County Alabama

Geneva Switzerland
BT	Europe
	.Central Europe
	..Switzerland
	...Geneva Switzerland
RT	Jura Mountains
	Lake Geneva
SN	Canton surrounding W end of Lake Geneva. Also a city.

Gengma-Lancang earthquake 1988
USE	Lancang-Gengma earthquake 1988

Genoa Italy
BT	Europe
	.Southern Europe
	..Italy
	...Liguria Italy
	....Genoa Italy
UF	Genova Italy
SN	Province and city on the Ligurian Sea in NW Italy.

Genova Italy
USE	Genoa Italy

genthelvite
BT	sulfides
	.genthelvite
BT	silicates
	.framework silicates
	..genthelvite
RT	helvite
SN	This term has multiple hierarchies.

Gentry County Missouri
BT	United States
	.Missouri
	..Gentry County Missouri

geo

geoarchaeology
USE	archaeology

geobarometry
USE	geologic barometry

geobotanical methods
UF	geobotanical prospecting
RT	remote sensing
	methods
	geochemical methods
	mineral exploration
	biogeochemical methods

geobotanical prospecting
USE	geobotanical methods

geoche

geochemical
SN	A valid term through 1977. See geochemical maps, geochemical methods, geochemical surveys.

geochemical anomalies
RT	anomalies
	chemical elements
	geochemistry
	haloes
	hydrocarbons
	lithogeochemistry
	mineral exploration
	pollution
SN	Added to Thesaurus in 1993.

geochemical background
SN	Not a valid term for GeoRef. See background level.

geochemical controls
RT	controls
	mineral deposits, genesis
	sedimentation
SN	Also search geochemical.

geochemical cycle
NT	carbon cycle
RT	carbon
	cycles
	Gaia hypothesis
	geochemistry
	metals
	migration of elements
	nitrogen
	oxygen
	sulfur
SN	Before 1982, search cycles AND geochemistry. Added to Thesaurus in 1982.

geochemical exploration
USE	geochemical methods

geochemical indicators
RT	biomarkers
	geochemical surveys
	geochemistry
	indicators
SN	Added to Thesaurus in 1981.

geochemical investigations
SN	Not a valid GeoRef index term after 1970. See geochemistry; geochemical methods, geochemical surveys.

geochemical logging
BT	well-logging
	.geochemical logging
UF	chemical logging
RT	geochemistry
	geophysical methods
	geochemical methods
	geochemical surveys
	downhole methods
	lithogeochemistry
	geochemical profiles
SN	Also search geochemical methods and well-logging for methods studies. Added to Thesaurus in 1995.

geochemical maps
BT	maps
	.geochemical maps
SN	Before 1978, search maps AND geochemical.

geochemical methods
NT	biogeochemical methods
UF	geochemical exploration
	geochemical prospecting
RT	geochemistry
	chemical analysis
	automated analysis
	methods
	haloes
	geochemical surveys
	Bear-Slave Operation
	mineral exploration
	geobotanical methods
	exploration
	dispersion patterns
	radon emanometry
	geochemical logging
	soil gases
	pathfinders
SN	From 1993-1997, restricted to economic studies. Before 1993, also search lithogeochemical methods if applicable. Also see geochemical surveys.

geochemical models
SN	Not a valid term for GeoRef. Use geochemistry in combination with models. Also use specific names of the geochemical models if available.

Geochemical Ocean Sections Program
USE	GEOSECS

geochemical profiles
RT	chemical analysis
	geochemical logging
	geochemistry
SN	Before 1981, search profiles AND geochemistry. Added to Thesaurus in 1981.

geochemical prospecting
USE	geochemical methods

geochemical surveys
BT	surveys
	.geochemical surveys
RT	geochemistry
	background level
	geochemical methods
	detection limit
	mineral exploration
	geochemical indicators
	chemical composition
	geochemical logging
	lake sediments
	stream sediments
SN	For economic geology, also see geochemical methods, biogeochemical methods.

geochemistry
NT	lithogeochemistry
RT	absolute age
	absorption
	activity
	adsorption
	advection
	alanine
	alkalinity
	alumina
	ammonia compound
	ammonium
	ammonium ion
	anions
	aqueous solutions
	atmosphere
	background level
	basin analysis
	bicarbonate ion
	biochemistry
	biogeochemical methods
	buffers
	calcium
SN	Used for broad treatments as well as specific experiments.

Geochemistry (category)
SN	Geochemistry, GeoRef category code 02, is one of thirty categories used to classify documents in GeoRef. Each reference in GeoRef is assigned one or more categories. Categories can be used, in addition to Terms, to refine searches (See List A.).

geochronology
UF	geologic chronology
RT	absolute age
	cosmochronology
	dates
	geochemistry
	isochrons
	metamorphic rocks
	exposure age
	epimerization
	metamorphism
	fission-track dating
	meteor craters
	biochronology
	chronology
	cation-ratio dating
	event stratigraphy
	hydration of glass
	lichenometry
	optical
SN	Used for non-isotopic dating. For isotopic (radiometric or radiogenic) dating, see absolute age. Indexed with for relative age methods. Include specific methods when possible, [e.g. electron paramagnetic resonance, exposure age, fission-track dating, hydr

Geochronology (category)
SN	Geochronology, GeoRef category code 03, is one of thirty categories used to classify documents in GeoRef. Each reference in GeoRef is assigned one or more categories. Categories can be used, in addition to Terms, to refine searches (See List A.).

geocronite
BT	sulfosalts
	.sulfantimonites
	..geocronite
BT	sulfosalts
	.sulfarsenites
	..geocronite
SN	This term has multiple hierarchies.

geodes
BT	sedimentary structures
	.secondary structures
	..geodes
UF	thunder eggs
RT	concretions
	vugs

geodesy
RT	altimetry
	baseline studies
	cartography
	coordinates
	deformation
	Doppler effect
	Earth
	Earth tides
	ellipticity
	engineering geology
	exploration
	figure of Earth
	geodetic coordinates
	geodetic networks
	geoid
	geomorphology
	geophysical methods
	geophysical surveys
SN	Used infrequently and for geologic applications only. For the Moon, use selenodesy.

geodetic coordinates
RT	coordinates
	CRIB
	geodesy
	geometry
	geotraverses
	satellite methods
	trilateration
	very long baseline interferometry

geodetic networks
RT	geodesy
	geophysical methods
	geophysical surveys
	networks
	triangulation
	very long baseline interferometry
SN	Before 1993, also search networks and geodesy. Added to Thesaurus in 1993.

geodynamics
RT	dynamics
	Earth
	interior
	plate tectonics
	tectonics

geodynamo
USE	dynamos

geographic distribution
SN	A valid term through 1978. For fossils, see distribution or biogeography.

geographic information systems
BT	information systems
	.geographic information systems
RT	data processing
	visualization
	systems
	ARC/INFO
	computer networks
	expert systems
	data bases
	information management
	digital data
	spatial data
	PROSPECTOR
SN	Sometimes abbreviated as GIS. Added to Thesaurus in 1989.

geography
UF	physical geography
RT	biogeography
	geomorphology
	paleogeography
	regional
	CRIB

geogrids
UF	polymer grids
RT	materials
	embankments
	slope stability
	engineering geology
	soil mechanics
	retaining walls
	polymers
	geotextiles
	reinforced materials

geohydrology
USE	hydrogeology

geoid
RT	Earth
	figure of Earth
	geodesy
	selenodesy
SN	An equipotential surface composed of the undisturbed surface of the oceans and its imaginary extension through the continents.

geologic
SN	A valid term through 1977. After 1977, use geologic maps.

geologic barometry
UF	barometry, geologic
	geobarometry
	geological barometry
RT	geochemistry
	P-T-t paths
	inclusions
	geologic thermometry
	fluid inclusions
	decompression
	lithogeochemistry
	P-T conditions

geologic chronology
USE	geochronology

geologic cryometry
SN	Use glacial geology or permafrost as applicable.

geologic engineering
USE	engineering geology

geologic exploration
SN	Not a valid index term after 1970. Used in subfile N. Now use coal exploration, mineral exploration, petroleum exploration, exploration, or see geological methods.

geologic formations, tables
SN	Not a valid GeoRef index term after 1970. Also search geologic formation tables; geologic formations; geologic formations (lists, sections, tables).

geologic hazards
UF	hazards, geologic
RT	erosion
	earthquakes
	engineering geology
	faults
	environmental geology
	avalanches
	aircraft
	ash clouds
	explosions
	catastrophes
	damage
	destruction
	ground motion
	fires
	land loss
	human ecology
	impact statements
	geologic hazards maps
	floods
	hurricanes
	land subsi
SN	Used for studies on the initiation, controls and effects of various geological phenomena which may be hazardous to human ecology. Indexed with specific hazard as applicable [e.g. avalanches, catastrophes, earthquakes, explosions, faults, floods, land subs

geologic hazards maps
BT	maps
	.geologic hazards maps
RT	geologic hazards
	environmental geology maps
SN	Before 1993, also search geologic hazards AND environmental geology maps. Added to Thesaurus in 1993.

geologic history
SN	Not a valid GeoRef index term after 1970. See stratigraphy; historical geology; paleogeography.

geologic literature
SN	Not a valid GeoRef index term after 1970. See bibliography; publications.

geologic mapping
SN	A valid term through 1975. To search, see cartography or mapping for the process of gathering data for the production of a specific map.

geologic maps
BT	maps
	.geologic maps
SN	Before 1978, also search maps AND geologic.

Geologic Maps (category)
SN	Geologic maps, GeoRef category code 14, is one of thirty categories used to classify documents in GeoRef. Each reference in GeoRef is assigned one or more categories. Categories can be used, in addition to Terms, to refine searches (See List A.).

geologic publications
USE	publications

geologic reports
SN	Not a valid GeoRef index term after 1970. See report; annual report; progress report.

geologic sites
RT	archaeological sites
	conservation
	educational resources
	fossil localities
	historical geology
	land use
	mineral localities
	natural resources
	preservation
	protection
SN	Any site which is considered for preservation or conservation based on geological usefulness. Selection principles may include representativeness or uniqueness of features, environments or processes; classic or historical importance; or research or educat

geologic surveys
USE	survey organizations

geologic thermometry
UF	geothermometry
RT	geochemistry
	P-T-t paths
	thermochronology
	inclusions
	temperature
	C-13/C-12
	fluid inclusions
	geologic barometry
	decrepitation
	lithogeochemistry
	microthermometry
	P-T conditions
	O-18/O-16
	paleotemperature
	S-34/S-32

geologic time
SN	Not a valid GeoRef index term after 1970. See absolute age; geochronology.

geological barometry
USE	geologic barometry

geological exploration
SN	A valid term through 1971. See maps, cartography, mapping. For economic studies, see coal exploration, petroleum exploration, mineral exploration, exploration.

Geological Long-Range Inclined ASDIC
USE	GLORIA

geological methods
RT	exploration
	geomorphological methods
	methods
	mineral exploration

geological microbiology
USE	geomicrobiology

geological oceanography
USE	marine geology

Geological Society of America
USE	GSA

Geological Survey of Canada
BT	government agencies
	.survey organizations
	..Geological Survey of Canada
RT	Canada

Geological Survey of India
BT	government agencies
	.survey organizations
	..Geological Survey of India
UF	GSI (Geological Survey of India)
RT	India

geologists
RT	employment
	ethics
	geology
	licensing
	minorities
	practice
	registration
	women
SN	Before 1975, also search geology as a profession.

geology
UF	geoscience
RT	associations
	education
	engineering geology
	environmental geology
	economic geology
	current research
	extraterrestrial geology
	catalogs
	areal geology
	bibliography
	collections
	creationism
	causes
	concepts
	elementary geology
	employment
	geologists
	ethics
	geophys
SN	For general treatments stressing the profession and the discipline.

geology as a profession
SN	A valid term through 1975. After 1975, use practice. Also see geology and education.

geomagnetic secular variation
USE	secular variations

geomagnetism
SN	A valid term through 1975. After 1975, see magnetic field under Earth (and other planets) and Moon; see paleomagnetism.

geomembranes
RT	dams
	drainage
	embankments
	engineering geology
	erosion control
	foundations
	geotextiles
	highways
	materials
	reservoirs
	rock mechanics
	seepage
	slope stability
	soil mechanics
	waste disposal
	waste management
	waterways
SN	Added to Thesaurus in 1984.

geometry
RT	channel geometry
	eccentricity
	ellipticity
	folds
	geodetic coordinates
	mathematical geology
	plate geometry
	quantitative geomorphology
	statistical analysis
	structural analysis
	topology
	tortuosity
	waterways

geomicrobiological prospecting
SN	Not a valid GeoRef index term after 1970. See geobotanical methods; biogeochemical methods.

geomicrobiology
UF	geological microbiology
	microbiological geology
	microbiology, geological
RT	microfossils
	paleontology
	microorganisms
	nitrification
	biology
	paleobotany
	paleobiology
	coliform bacteria
	Escherichia coli
	micropaleontology
	palynology
SN	Added to Thesaurus in 1982.

geomorphic geology
USE	geomorphology

geomorpholo

geomorpholog

geomorphologic
SN	A valid term through 1977. After 1977, use geomorphologic maps.

geomorphologic controls
RT	climatic controls
	controls
	mineral deposits, genesis
	structural controls
SN	Added to Thesaurus in 1989.

geomorphologic effects
RT	effects
	isostasy
	neotectonics

geomorphologic maps
BT	maps
	.geomorphologic maps
RT	geomorphology
	glacial geology maps
	physiographic maps
	surficial geology maps
SN	Before 1978, also search maps AND geomorphologic.

geomorphological

geomorphological methods
RT	geological methods
	geophysical methods
	methods
	mineral exploration

geomorphology
UF	geomorphic geology
RT	avalanches
	aerial photography
	aggradation
	alluvial fans
	alluvial plains
	alpine-type features
	arid environment
	barchans
	arroyos
	barrier islands
	astroblemes
	badlands
	barrier beaches
	beaches
	bars
	bays
	beach profiles
	beach ridges
	berms
	bedforms
	benches
	blowou
SN	Before 1976, also search physiography.

Geomorphology (category)
SN	Geomorphology, GeoRef category code 23, is one of thirty categories used to classify documents in GeoRef. Each reference in GeoRef is assigned one or more categories. Categories can be used, in addition to Terms, to refine searches (See List A.).

geomorphy
SN	Not a valid GeoRef index term after 1970. See geomorphology; geodesy.

geophones
RT	acoustical methods
	AVO methods
	hydrophones
	instruments
	seismic methods
	seismographs
SN	Added to Thesaurus in 1985.

geophys

geophysical
SN	A valid term through 1977. After 1977, use geophysical maps, or geophysical methods or geophysical surveys.

geophysical exploration
SN	Not a valid GeoRef index term after 1971. Used in subfiles E, N, T and B. Now use geophysical methods or geophysical surveys. See exploration.

geophysical investigations
SN	Not a valid GeoRef index term after 1970. See geophysical methods, geophysical surveys, well-logging.

geophysical logging
USE	well-logging

geophysical maps
BT	maps
	.geophysical maps
RT	geophysical survey maps
SN	Before 1978, search maps AND geophysical.

geophysical methods
NT	acoustical methods
	Earth-current methods
	electrical methods
	electromagnetic methods
	gravity methods
	infrared methods
	magnetic methods
	magnetotelluric methods
	neutron-gamma methods
	neutron-neutron methods
	radioactivity methods
	reflection methods
	refraction methods
	seismic methods
RT	aeromagnetic maps
	air guns
	airborne methods
	apparent resistivity
	arrays
	audiomagnetotelluric methods
	automated analysis
	autoradiography
	AVO methods
	backscattering
	basin analysis
	bathymetry
	borehole televiewers
	Bouguer anomalies
	CALCRUST
	conductive materia
SN	Used for discussions which stress methodology of applied geophysics. To eliminate surveys, search geophysical methods NOT geophysical surveys. For surveys, also index geophysical surveys and the area.

geophysical observations
SN	For surveys, search geophysical surveys. Also see geophysics.

geophysical profiles
NT	gravity profiles
	magnetic profiles
	seismic profiles
RT	COCORP
	geophysical methods
	geophysical surveys
	geotraverses
	lidar methods
SN	Before 1981, search geophysical AND profiles. Added to Thesaurus in 1981.

geophysical research
SN	Not a valid GeoRef index term after 1971. Used in subfile G. Now use geophysical methods or geophysics as applicable. See geophysical surveys for surveys.

geophysical survey maps
BT	maps
	.geophysical survey maps
RT	geophysical methods
	geophysical surveys
	aeromagnetic maps
	magnetic survey maps
	electromagnetic survey maps
	geophysical maps
	gravity survey maps
	radioactivity survey maps
	seismic survey maps
SN	Also search maps AND geophysical surveys and area. Added to Thesaurus in 1985.

geophysical surveys
BT	surveys
	.geophysical surveys
RT	acoustical methods
	aeromagnetic maps
	airborne methods
	automated analysis
	basin analysis
	Bouguer anomalies
	apparent resistivity
	arrays
	audiomagnetotelluric methods
	bathymetry
	deep seismic sounding
	CSAMT methods
	deep magnetic sounding
	dipole-dipole methods
SN	For geophysical methods applied to specific areas. The methods are generally those of exploration and primarily concerned with the shallow structure of the Earth. Geophysical surveys is used with specific geophysical methods terms. For surveys of specific

geophysics
RT	adiabatic demagnetization
	alpha quartz
	alternating field demagnetization
	anvil cells
	atmosphere
	backscattering
	Born approximation
	chemical demagnetization
	core
	crust
	deep seismic sounding
	deformation
	demagnetization
	dilatancy
	direct problem
	dynamos
	Earth
SN	For general treatments stressing the profession and the discipline plus experimental studies on minerals and other materials.

Geophysics (category)
SN	Geophysics, GeoRef category code 17, is one of thirty categories used to classify documents in GeoRef. Each reference in GeoRef is assigned one or more categories. Categories can be used, in addition to Terms, to refine searches (See List A.).

geopressure
RT	blowouts
	borehole breakouts
	hydrostatic pressure
	overpressure
	petroleum
	pressure
	reservoir rocks
	sedimentation
SN	Related to reservoir rocks. Associated with areas of great thickness of sedimentation. Exceeds normal hydrostatic pressure. May be used with inclusions, commodity terms, or materials.

GeoRef
RT	bibliography
	data bases
	data processing
	information systems
SN	Added to Thesaurus in 1985.

George County Mississippi
BT	United States
	.Mississippi
	..George County Mississippi

George River Group
BT	drynian
	.George River Group
RT	Nova Scotia
SN	Cape Breton Island, Nova Scotia. Consists of quartzite, marble, schist and gneiss. Added to Thesaurus in 1989.

Georges Bank
BT	Atlantic Ocean
	.North Atlantic
	..Georges Bank
RT	Gulf of Maine
	Georges Bank basin
SN	E of Massachusetts and S of Nova Scotia.

Georges Bank basin
BT	Atlantic Ocean
	.North Atlantic
	..Georges Bank basin
RT	Gulf of Maine
	Georges Bank
SN	Off the coast of E Massachusetts and S Nova Scotia in NW Atlantic. Added to Thesaurus in 1989.

Georgetown
SN	No longer a valid term for GeoRef. As of 1989, see Georgetown South Carolina if applicable. As of 1993, see Georgetown Gambia or Georgetown Guyana as applicable. Occurs in numerous locations.

Georgetown County South Carolina
BT	United States
	.South Carolina
	..Georgetown County South Carolina
NT	Georgetown South Carolina
SN	Bordering the Atlantic Ocean in E South Carolina.

Georgetown Formation
BT	Chronostratigraphic Units
	.Phanerozoic
	..Mesozoic
	...Cretaceous
	....Lower Cretaceous
	.....Georgetown Formation
BT	Chronostratigraphic Units
	.Phanerozoic
	..Mesozoic
	...Cretaceous
	....Comanchean
	.....Georgetown Formation
RT	Louisiana
	Texas
	Arkansas
	Washita Group
SN	Comanchean. In Washita Group. Central and S Texas, Arkansas, Louisiana. This term has multiple hierarchies. Added to Thesaurus in 1993.

Georgetown Gambia
BT	Africa
	.West Africa
	..Gambia
	...Georgetown Gambia
SN	City on the Atlantic Ocean.

Georgetown Guyana
BT	South America
	.Guyana
	..Georgetown Guyana
SN	City on the Atlantic Ocean.

Georgetown South Carolina
BT	United States
	.South Carolina
	..Georgetown County South Carolina
	...Georgetown South Carolina
SN	City in E South Carolina.

Georgia
BT	United States
	.Georgia
NT	Altamaha River
	Appling County Georgia
	Atkinson County Georgia
	Bacon County Georgia
	Baker County Georgia
	Baldwin County Georgia
	Banks County Georgia
	Barrow County Georgia
	Bartow County Georgia
	Ben Hill County Georgia
	Berrien County Georgia
	Bibb County Georgia
	Bleckley County Georgia
	Brantley County Georgia
	Brooks County Georgia
	Bryan County Georgia
	Bulloch County Georgia
	Burke County Georgia
	Butts County Georgia
	Calhoun County Georgia
	Camden County Georgia
	Candler County Georgia
	Carroll County Georgia
	Catoosa County Georgia
	Charlton County Georgia
	Chatham County Georgia
	Chattahoochee County Georgia
	Chattooga County Georgia
	Cherokee County Georgia
	Clarke County Georgia
	Clay County Georgia
	Clayton County Georgia
	Clinch County Georgia
	Cobb County Georgia
	Coffee County Georgia
	Colquitt County Georgia
	Columbia County Georgia
	Cook County Georgia
	Coweta County Georgia
	Crawford County Georgia
	Crisp County Georgia
	Dade County Georgia
	Dawson County Georgia
	De Kalb County Georgia
	Decatur County Georgia
	Dodge County Georgia
	Dooly County Georgia
	Dougherty County Georgia
	Douglas County Georgia
	Early County Georgia
	Echols County Georgia
	Effingham County Georgia
	Elbert County Georgia
	Emanuel County Georgia
	Evans County Georgia
	Fannin County Georgia
	Fayette County Georgia
	Floyd County Georgia
	Forsyth County Georgia
	Franklin County Georgia
	Fulton County Georgia
	Gilmer County Georgia
	Glascock County Georgia
	Glynn County Georgia
	Gordon County Georgia
	Grady County Georgia
	Greene County Georgia
	Gwinnett County Georgia
	Habersham County Georgia
	Hall County Georgia
	Hancock County Georgia
	Haralson County Georgia
	Harris County Georgia
	Hart County Georgia
	Heard County Georgia
	Henry County Georgia
	Houston County Georgia
	Irwin County Georgia
	Jackson County Georgia
	Jasper County Georgia
	Jeff Davis County Georgia
	Jefferson County Georgia
	Jenkins County Georgia
	Johnson County Georgia
	Jones County Georgia
	Lamar County Georgia
	Lanier County Georgia
	Laurens County Georgia
	Lee County Georgia
	Liberty County Georgia
	Lincoln County Georgia
	Long County Georgia
	Lowndes County Georgia
	Lumpkin County Georgia
	Macon County Georgia
	Madison County Georgia
	Marion County Georgia
	McDuffie County Georgia
	McIntosh County Georgia
	Meriwether County Georgia
	Miller County Georgia
	Mitchell County Georgia
	Monroe County Georgia
	Montgomery County Georgia
	Morgan County Georgia
	Murray County Georgia
	Muscogee County Georgia
	Newton County Georgia
	Oconee County Georgia
	Oglethorpe County Georgia
	Paulding County Georgia
	Peach County Georgia
	Pickens County Georgia
	Pierce County Georgia
	Pike County Georgia
	Polk County Georgia
	Pulaski County Georgia
	Putnam County Georgia
	Quitman County Georgia
	Rabun County Georgia
	Randolph County Georgia
	Richmond County Georgia
	Rockdale County Georgia
	Schley County Georgia
	Screven County Georgia
	Seminole County Georgia
	Spalding County Georgia
	Stephens County Georgia
	Stewart County Georgia
	Sumter County Georgia
	Talbot County Georgia
	Taliaferro County Georgia
	Tattnall County Georgia
	Taylor County Georgia
	Telfair County Georgia
	Terrell County Georgia
	Thomas County Georgia
	Tift County Georgia
	Toombs County Georgia
	Towns County Georgia
	Treutlen County Georgia
	Troup County Georgia
	Turner County Georgia
	Twiggs County Georgia
	Union County Georgia
	Upson County Georgia
	Walker County Georgia
	Walton County Georgia
	Ware County Georgia
	Warren County Georgia
	Washington County Georgia
	Wayne County Georgia
	Webster County Georgia
	Wheeler County Georgia
	White County Georgia
	Whitfield County Georgia
	Wilcox County Georgia
	Wilkes County Georgia
	Wilkinson County Georgia
	Worth County Georgia
RT	Atlantic Coastal Plain
	Avalon Zone
	Bangor Lim
SN	Used only for the state in the United States. Before 1978, included use for the Georgian Soviet Socialist Republic in Transcaucasia, USSR. Before 1978, search Georgia NOT USSR. After 1978, use Georgian Republic for region in Transcaucasia.

Georgia Basin
RT	British Columbia
	Canada
	Georgia
	Gulf of Mexico
	Leg 114
	Northeast Pacific
	South Atlantic
	South Carolina
	United States
SN	Used variously for basins in: Washington state and British Columbia; SE United States extending into the NE Gulf of Mexico (For this, also search South Georgia Basin.); and the S Atlantic SSE of the Argentine Basin. Search in combination with area of inte

Georgian Bay
RT	Lake Huron
	Ontario
SN	Inlet of E Lake Huron. Before 1995, Ontario was a broader term. Indexed with Ontario and/or Lake Huron as applicable.

Georgian Republic
BT	Europe
	.Georgian Republic
NT	Abkhazia Georgian Republic
	Adzharistan Georgian Republic
	Akhaltsikhe Georgian Republic
	Alazani
	Aragvi River
	Chiatura Georgian Republic
	Colchis
	Dzirula Massif
	Inguri River
	Kakhetia
	Kartlia
	Khekordzula Deposit
	Rioni Basin
	Shiraki Steppe
	Svanetia
	Tbilisi Georgian Republic
	Tkibuli Georgian Republic
	Trialet Range
RT	Argun River
	Lesser Caucasus
	Greater Caucasus
	Caucasus
	Transcaucasia
	Kura River
	Kuban Valley
	Ossetia
	Kuban River
	Racha
	Racha earthquake 1991
	Terek River
SN	Formerly the Georgian Soviet Socialist Republic in Transcaucasia. Before 1978, also search USSR AND Georgia.

Georgina Basin
BT	Australasia
	.Australia
	..Georgina Basin
RT	Queensland Australia
	Northern Territory Australia
SN	River drainage basin. Indexed with Northern Territory Australia and/or Queensland Australia as applicable.

GEOS
UF	General Earthquake Observation System
RT	earthquakes
	geophysical methods
	geophysical surveys
	seismic methods
	seismic networks
	observations
SN	Acronym. Added to Thesaurus in 1989.

Geosat
RT	altimetry
	geodesy
	geophysical methods
	geophysical surveys
	high-resolution methods
	radar methods
	remote sensing
	satellite methods
SN	Added to Thesaurus in 1993.

Geoscan
RT	bibliography
	data bases
	data processing
	information systems
	remote sensing
SN	Canadian national data base for geological information. Also a remote sensing instrument. Indexed with data bases if applicable. Added to Thesaurus in 1989.

geoscience
USE	geology

GEOSECS
UF	Geochemical Ocean Sections Program
RT	geochemistry
	oceanography
	research vessels
SN	Acronym.

geostat

geostatic pressure
USE	lithostatic pressure

geostatistics
BT	statistical analysis
	.geostatistics
RT	mathematical geology
	mathematical methods
	Bayesian analysis
	crosscorrelation
	autoregression
	variance analysis
	cokriging
	kriging
	covariance analysis
	semivariograms
	outliers
	uncertainty
	numerical analysis
	interpolation
	Monte Carlo analysis
	variograms
SN	Before 1971, also search statistical measures; statistics. Added to Thesaurus in 1982.

geostrophic force
SN	Not a valid term for GeoRef. Usually out-of-scope. Used as Coriolis force with ocean circulation.

geosynclines
RT	Adelaide Geosyncline
	Alpine Geosyncline
	Andean Geosyncline
	anticlinoria
	burial metamorphism
	clastic wedges
	continental drift
	Cordilleran Geosyncline
	crust
	eugeosynclines
	folds
	geanticlines
	Hercynian Geosyncline
	magmatism
	mantle
	metallogeny
	miogeosynclines
SN	Used for large, mobile downwarping of the crust, which subsides as rocks and sediments accumulate to thicknesses of thousands of meters. Indexed with with specific geosyncline where available.

geotechnical maps
BT	maps
	.engineering geology maps
	..geotechnical maps
RT	rock mechanics
	soil mechanics
SN	Added to Thesaurus in 1993.

geotechnical studies
SN	Not a valid term for GeoRef. See engineering properties, soil mechanics, rock mechanics, engineering geology, or materials as applicable.

geotecto

geotectonic maps
BT	maps
	.geotectonic maps
RT	plate tectonics
	sea-floor spreading
	paleogeography
	continental drift
	tectonophysics
	paleogeographic maps
	tectonic maps
SN	Used for maps illustrating plate tectonics, continental drift, sea-floor spreading and related topics. Added to Thesaurus in 1985.

geotectonics
USE	tectonics

geotextiles
RT	dams
	drainage
	embankments
	engineering geology
	erosion control
	foundations
	geogrids
	geomembranes
	highways
	materials
	reservoirs
	rock mechanics
	seepage
	slope stability
	soil mechanics
	waste disposal
	waste management
	waterways
SN	Added to Thesaurus in 1984.

geothermal doublets
RT	geothermal energy
	geothermal fields
	geothermal systems
SN	Added to Thesaurus in 1982.

geothermal energy
RT	brines
	cap rocks
	downhole methods
	energy
	energy sources
	fumaroles
	geothermal doublets
	geothermal fields
	geothermal reservoirs
	geothermal systems
	geysers
	ground water
	heat flow
	heat pumps
	heat sources
	heat storage
	high-level geothermal energy
	hot dry rocks
SN	Commodity. See List C.

geothermal fields
UF	fields, geothermal
RT	ground water
	heat storage
	Baca Field
	Cerro Prieto
	Beppu Japan
	geothermal systems
	geothermal energy
	Broadlands
	Clear Lake
	Coso Hot Springs KGRA
	East Mesa KGRA
	Kirishima
	geothermal doublets
	geothermal reservoirs
	hot dry rocks
	Hatchobaru Field
	Kizildere Fiel
SN	Before 1978, search geothermal.

geothermal gradient
RT	conductivity
	crust
	Earth
	heat flow
	mantle
	measurement
	regional patterns
	thermal conductivity
	thermal waters
	thermocline
SN	Also search geothermal gradients.

geothermal phenomena
USE	geothermal systems

geothermal processes
SN	Term was used from 1978-1980. No longer a valid term for GeoRef. See hydrothermal alteration or geothermal energy.

geothermal regimes
USE	geothermal systems

geothermal reservoirs
UF	reservoirs, geothermal
RT	geothermal fields
	geothermal systems
	geothermal energy
	reservoir rocks
	reservoir properties
SN	Indexed with geothermal energy for economic studies. Added to Thesaurus in 1995.

geothermal surveys
USE	heat flow

geothermal systems
UF	geothermal phenomena
	geothermal regimes
	hydrothermal systems
RT	ground water
	systems
	heat storage
	geothermal fields
	blowouts
	boiling
	brines
	geothermal energy
	thermal waters
	vents
	geothermal doublets
	geothermal reservoirs
	hot dry rocks
	thermal regime
SN	Before 1978, also search geothermal; geothermal regions.

geothermometry
USE	geologic thermometry

geotomography
USE	tomography

geotraverses
UF	transects
	traverses
RT	geodesy
	triangulation
	geophysical profiles
	geodetic coordinates
	European Geotraverse
	surveys
	INDEPTH
	Lithoprobe
	PACE
	TACT
SN	Added to Thesaurus in 1985.

Gephyrocapsa oceanica
BT	Plantae
	.algae
	..Coccolithophoraceae
	...Gephyrocapsa oceanica
RT	microfossils
SN	Species. Indexed with microfossils if applicable.

Gera Bezirk
SN	No longer a valid term for GeoRef. District in SW East Germany. See Thuringia Germany or Gera Germany.

Gera Germany
BT	Europe
	.Central Europe
	..Germany
	...Thuringia Germany
	....Gera Germany
SN	City in Thuringia, E Germany. As of 1981, Gera refers to only the city in the former Gera Bezirk, now in Thuringia. Before 1981, also included the East German district.

German
RT	catalogs
	dictionaries
	glossaries
	lexicons
SN	Used for studies about the language.

German Continental Deep Drilling Program
USE	KTB

German Democratic Republic
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.

German Southwest Africa
USE	Namibia

germanates
BT	oxides
	.germanates

germanite
BT	sulfosalts
	.sulfogermanates
	..germanite

germanium
BT	metals
	.germanium
UF	Ge

Germany
BT	Europe
	.Central Europe
	..Germany
NT	Alpenvorland
	Alster River
	Baden-Wurttemberg Germany
	Bavaria Germany
	Brandenburg Germany
	Brocken Massif
	Ems River
	Franconia
	Frankenberg Germany
	Frankfurt Germany
	Geisel Valley
	Hamburg Germany
	Harz Foreland
	Harz Mountains
	Harz region
	Hesse
	Hesse Basin
	Hesse Germany
	Kyffhauser Range
	Lahn River
	Lahn River valley
	Lower Saxony Germany
	Main River
	Mainz Basin
	Mecklenburg
	Mecklenburg-Western Pomerania Germany
	Nahe River
	North German Plain
	North Rhine-Westphalia Germany
	Northeastern German Plain
	Northern German Hills
	Northwestern German Plain
	Odenwald
	Palatinate
	Rhine Westphalian Basin
	Rhineland
	Rhineland-Palatinate Germany
	Rhon Mountains
	Saale River
	Saar-Nahe Basin
	Saarland Germany
	Saxonian Massif
	Saxony Germany
	Saxony-Anhalt Germany
	Saxony-Thuringia
	Schleswig-Holstein Germany
	Schwarzenberg Germany
	Southwestern German Hills
	Southwestern German Massifs
	Steinheim Basin
	Steinheim Germany
	Swabia
	Teutoburg Forest
	Thuringia Germany
	Thuringian Basin
	Thuringian Forest
	Thuringian Hills
	Thuringian Massif
	Unstrut River
	Upper Rhine Valley
	Vogtland
	Werra River
	Weser River
	Westerwald
	Westphalia
RT	Alps
	Allgau Alps
	Baltic Glaciation
	Baltic region
	Bohemian Massif
	Central Alps
	Danube River
	Danube Valley
	Limestone Alps
	Molasse Basin
	KTB
	European Platform
	Central Graben
	Elbe River
	Elbe Valley
	DEKORP
	Essen Beds
	Hunsruck Shale
	Lower Rhine Basin
	Lusatia
	Mo
SN	Country in Central Europe. Reunited in 1989 after being divided in 1949 into West Germany and East Germany. Upon reunification, state names for territory in West Germany were maintained, whereas the bezirks or districts in the territories of East Germany

Gerona City Spain
BT	Europe
	.Southern Europe
	..Iberian Peninsula
	...Spain
	....Catalonia Spain
	.....Gerona Spain
	......Gerona City Spain
SN	Refers only to the city in NE Spain.

Gerona Spain
BT	Europe
	.Southern Europe
	..Iberian Peninsula
	...Spain
	....Catalonia Spain
	.....Gerona Spain
NT	Ampurdan
	Gerona City Spain
	Osor Spain
RT	Ter River basin
SN	Refers only to the province in NE Spain on the Mediterranean Sea. From 1981-1992, also search Gerona Province and Spain. For the city, see Gerona City Spain.

Geronimo volcanic field
BT	United States
	.Arizona
	..Graham County Arizona
	...Geronimo volcanic field
SN	SE Arizona. Added to Thesaurus in 1989.

Gerrei
BT	Europe
	.Southern Europe
	..Italy
	...Sardinia Italy
	....Gerrei
SN	Region in SE Sardinia.

Gers France
BT	Europe
	.Western Europe
	..France
	...Gers France
RT	Adour Basin
SN	Department in SW France.

gersdorffite
BT	sulfides
	.gersdorffite
BT	arsenides
	.gersdorffite
UF	nickel glance
RT	nickel ores
SN	This term has multiple hierarchies.

Getchell Mine
BT	mboldt County Nevada
	.Getchell Mine
RT	mines
	gold ores
SN	NW Nevada.

Gething Formation
BT	Chronostratigraphic Units
	.Phanerozoic
	..Mesozoic
	...Cretaceous
	....Lower Cretaceous
	.....Gething Formation
RT	Alberta
	British Columbia
SN	Peace River District. NE British Columbia and NW Alberta. Added to Thesaurus in 1989.

Getic Basin
USE	Getic Nappe

Getic Nappe
BT	Europe
	.Southern Europe
	..Romania
	...Getic Nappe
UF	Getic Basin
RT	Transylvania
	Banat
	Transylvanian Alps
SN	NW part of Transylvanian Alps in Hunedoara County in SW Transylvania and E Banat. Indexed with regions as applicable.

Gettysburg Basin
BT	United States
	.Gettysburg Basin
RT	Pennsylvania
	Maryland
	Newark Basin
	Newark-Gettysburg Basin
SN	Triassic to Jurassic rift basin in S central Pennsylvania and Maryland. Indexed with states as applicable. Added to Thesaurus in 1989.

Geula Cave
USE	Geula Caves

Geula Caves
BT	Asia
	.Middle East
	..Israel
	...Geula Caves
UF	Geula Cave
RT	Haifa Israel
	Mount Carmel
SN	Mount Carmel.

geysers
UF	gusher
	pulsating spring
RT	ground water
	fumaroles
	geothermal energy
	thermal waters
	springs
	hot springs

Geysers, The
USE	The Geysers

Gezira
BT	Africa
	.East Africa
	..Sudan
	...Gezira
SN	Region between Blue Nile and White Nile rivers in central Sudan.

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