Search SEDIS

Thesaurus

Cl
USE	chlorine

Cl-36
BT	isotopes
	.radioactive isotopes
	..Cl-36
BT	halogens
	.chlorine
	..Cl-36
SN	This term has multiple hierarchies.

Cl-37/Cl-35
BT	isotopes
	.stable isotopes
	..Cl-37/Cl-35
BT	halogens
	.chlorine
	..Cl-37/Cl-35
RT	isotope ratios
SN	This term has multiple hierarchies.

Clackamas County Oregon
BT	United States
	.Oregon
	..Clackamas County Oregon
RT	Mount Hood
SN	NW Oregon.

clades
USE	cladistics

cladism
USE	cladistics

cladistic analysis
USE	cladistics

cladistic taxonomy
USE	cladistics

cladistics
UF	clades
	cladism
	cladistic analysis
	cladistic taxonomy
	cladograms
RT	biologic evolution
	paleontology
	phylogeny
	mathematical methods
	statistical analysis
	paleobotany
	biometry
	parsimony
	taxonomy
SN	Added to Thesaurus in 1985.

Cladocera
BT	Invertebrata
	.Arthropoda
	..Mandibulata
	...Crustacea
	....Branchiopoda
	.....Cladocera
SN	Order.

Cladocopina
BT	Invertebrata
	.Arthropoda
	..Mandibulata
	...Crustacea
	....Ostracoda
	.....Myodocopida
	......Cladocopina
RT	microfossils
SN	Suborder. Indexed with microfossils if applicable.

cladograms
USE	cladistics

Cladophlebis
BT	Plantae
	.Pteridophyta
	..Filicopsida
	...Cladophlebis
RT	palynomorphs
	miospores

Claiborne County Mississippi
BT	United States
	.Mississippi
	..Claiborne County Mississippi
SN	SW Mississippi.

Claiborne County Tennessee
BT	United States
	.Tennessee
	..Claiborne County Tennessee
SN	NE Tennessee.

Claiborne Group
BT	Chronostratigraphic Units
	.Phanerozoic
	..Cenozoic
	...Paleogene
	....Eocene
	.....middle Eocene
	......Claiborne Group
RT	Louisiana
	Mississippi
	Texas
	Alabama
	Florida
	Georgia
	Carrizo Sand
	Cockfield Formation
	Cook Mountain Formation
	Lisbon Formation
	Queen City Formation
	Sparta Sand
	Tallahatta Formation
	Yegua Formation
SN	Includes Carrizo Sand, Reklaw Formation, Queen City Sand, Weches Glauconitic Marl, Viesca Glauconitic Marl, Sparta Sand, Stone City Beds, Crockett Formation, Landrum Shale, Spiller Sand, Yegua Formation, Gosport Sand, Tallahatta Formation, Zilpha Clay, Wi

Claiborne Parish Louisiana
BT	United States
	.Louisiana
	..Claiborne Parish Louisiana
SN	NW Louisiana.

Clallam County Washington
BT	United States
	.Washington
	..Clallam County Washington
RT	Olympic Mountains
	Juan de Fuca Strait
SN	NW Washington.

Clara Mine
RT	Baden-Wurttemberg Germany
	barite deposits
	mines
	metal ores
SN	Near Oberwolfach, Germany. Indexed with Baden-Wurttemberg Germany or region as applicable. Added to Thesaurus in 1993.

clarain
BT	macerals
	.clarain
BT	lithotypes
	.clarain
SN	This term has multiple hierarchies. Added to Thesaurus in 1989.

Clare County Michigan
BT	United States
	.Michigan
	..Michigan Lower Peninsula
	...Clare County Michigan

Clare Ireland
BT	Europe
	.Western Europe
	..Ireland
	...Clare Ireland
SN	County on the Atlantic in W Ireland.

Clarence-Moreton Basin
BT	Australasia
	.Australia
	..Clarence-Moreton Basin
UF	Moreton-Clarence Basin
RT	Queensland Australia
	New South Wales Australia
SN	E Australia, straddling the New South Wales-Queensland Australia border. Indexed with Queensland Australia and/or New South Wales Australia as applicable. Added to Thesaurus in 1998.

Clarendon County South Carolina
BT	United States
	.South Carolina
	..Clarendon County South Carolina

Clarendonian
BT	Chronostratigraphic Units
	.Phanerozoic
	..Cenozoic
	...Neogene
	....Miocene
	.....Clarendonian
RT	middle Miocene
	upper Miocene
SN	North America. Miocene, above Barstovian and below Hemphillian. Added to Thesaurus in 1985.

Clarion County Pennsylvania
BT	United States
	.Pennsylvania
	..Clarion County Pennsylvania

Clarion fracture zone
BT	Pacific Ocean
	.North Pacific
	..Northeast Pacific
	...Clarion fracture zone
SN	NE Pacific off S Baja California. This term has multiple hierarchies. Added to Thesaurus in 1985.

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

Clark County Idaho
BT	United States
	.Idaho
	..Clark County Idaho
RT	INEEL
SN	E Idaho.

Clark County Illinois
BT	United States
	.Illinois
	..Clark County Illinois
SN	E Illinois.

Clark County Indiana
BT	Indiana
	.Clark County Indiana
SN	SE Indiana.

Clark County Kansas
BT	United States
	.Kansas
	..Clark County Kansas
SN	SW Kansas.

Clark County Kentucky
BT	United States
	.Kentucky
	..Clark County Kentucky
SN	Central Kentucky.

Clark County Missouri
BT	United States
	.Missouri
	..Clark County Missouri
SN	Extreme NE Missouri.

Clark County Nevada
BT	United States
	.Nevada
	..Clark County Nevada
NT	Las Vegas Nevada
	Moapa Valley
RT	Black Mountains
	Lake Mead
	Las Vegas Valley
	Lost City
	River Mountains
	Spring Mountains
SN	SE Nevada.

Clark County Ohio
BT	United States
	.Ohio
	..Clark County Ohio
NT	Springfield Ohio
SN	W central Ohio.

Clark County South Dakota
BT	United States
	.South Dakota
	..Clark County South Dakota
SN	E central South Dakota.

Clark County Washington
BT	United States
	.Washington
	..Clark County Washington
NT	Vancouver Washington
SN	SW Washington.

Clark County Wisconsin
BT	United States
	.Wisconsin
	..Clark County Wisconsin
SN	Central Wisconsin.

Clark Fork
RT	Clark's Fork Basin
	Idaho
	Montana
	United States
SN	Tributary of the Pend Oreille River, NW Montana and N Idaho. Indexed with counties or states as applicable. Added to Thesaurus in 1985.

Clark's Fork Basin
BT	United States
	.Clark's Fork Basin
RT	Wyoming
	Montana
	Clark Fork
SN	NW Wyoming and S central Montana. Indexed with states as applicable. Added to Thesaurus in 1985.

Clarke County Alabama
BT	United States
	.Alabama
	..Clarke County Alabama
SN	SW Alabama.

Clarke County Georgia
BT	United States
	.Georgia
	..Clarke County Georgia
NT	Athens Georgia
SN	NE central Georgia.

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

Clarke County Mississippi
BT	United States
	.Mississippi
	..Clarke County Mississippi
SN	E Mississippi.

Clarke County Virginia
BT	United States
	.Virginia
	..Clarke County Virginia
SN	N Virginia.

Clarno Formation
BT	Chronostratigraphic Units
	.Phanerozoic
	..Cenozoic
	...Paleogene
	....Eocene
	.....Clarno Formation
RT	Oregon
SN	Subdivided into four units. N central Oregon.

Clarno Oregon
BT	United States
	.Oregon
	..Wheeler County Oregon
	...Clarno Oregon
SN	Village in N central Oregon.

Claron Formation
BT	Chronostratigraphic Units
	.Phanerozoic
	..Cenozoic
	...Paleogene
	....Claron Formation
RT	Paleocene
	Eocene
	Oligocene
	Utah
	Arizona
SN	SW Utah and surrounding areas. Indexed with age as applicable. Added to Thesaurus in 1995.

classification
RT	definition
	event stratigraphy
	identification
	miscellanea
	nomenclature
	taxonomy
	terrain classification

Classopollis
BT	palynomorphs
	.miospores
	..Classopollis
RT	microfossils
SN	Indexed with microfossils if applicable.

clastic dikes
BT	sedimentary structures
	.soft sediment deformation
	..clastic dikes
RT	dikes
	sandstone dikes

clastic rocks
BT	sedimentary rocks
	.clastic rocks
NT	arenite
	argillite
	arkose
	bentonite
	black shale
	breccia
	cinerite
	claystone
	conglomerate
	diamictite
	diatomaceous earth
	eolianite
	fanglomerate
	flysch
	gaize
	graywacke
	marl
	megabreccia
	microbreccia
	molasse
	mudstone
	novaculite
	orthoquartzite
	porcellanite
	radiolarite
	red beds
	sandstone
	saprolite
	shale
	siltstone
	sparagmite
	spongolite
	subarkose
	subgraywacke
	tillite
	tilloid
	tonstein
RT	diatomite
	pyroclastics
	fines
	clastic sediments
	bauxite
	fine-grained materials
	terrigenous materials
	volcaniclastics
	bone beds
	turbidite
	coarse-grained materials
	contourite
	fragments
	greensand
	laminite
	siliceous composition
	siliciclastics
	tempestite
	wildfl
SN	Valid index term for GeoRef since 1976. From 1976 -1977, search clastic rocks AND terrigenous or nonterrigenous. Also search clastic.

clastic sediments
BT	sediments
	.clastic sediments
NT	alluvium
	boulder clay
	boulders
	clay
	cobbles
	colluvium
	diamicton
	drift
	dust
	eluvium
	erratics
	flint clay
	gravel
	kaolin
	loess
	mud
	ooze
	outwash
	overbank sediments
	pebbles
	proluvium
	quartz sand
	residual clays
	residuum
	sand
	shingle
	silt
	till
RT	pyroclastics
	fines
	fine-grained materials
	clastic rocks
	terrigenous materials
	ash flows
	pyroclastic flows
	particulate materials
	bentonite
	turbidite
	coquina
	cementation
	coarse-grained materials
	contourite
	greensand
	siliciclastics
	tempestite
	flysch
	gaize
	vo
SN	Valid index term for GeoRef since 1976. Also search clastic. Also search contourite if applicable.

clastic wedges
RT	geosynclines
	orogenic belts
	sedimentation
SN	Added to Thesaurus in 1989.

clastics
SN	Used through 1975 in combination with terrigenous or nonterrigenous to indicate sedimentary rocks or sediments (i.e. clastics, terrigenous or clastics, nonterrigenous). After 1975 through 1977, clastic rocks and clastic sediments were used in combination

clasts
RT	fragments
	sedimentary rocks
	sediments

clathrate compounds
USE	clathrates

clathrate inclusion compounds
USE	clathrates

clathrates
UF	clathrate compounds
	clathrate inclusion compounds
RT	organic compounds
	clay mineralogy
	zeolite group
	petroleum
	gas hydrates
	natural gas
SN	Added to Thesaurus in 1985.

Clatsop County Oregon
BT	United States
	.Oregon
	..Clatsop County Oregon
SN	Extreme NW Oregon.

clay
BT	sediments
	.clastic sediments
	..clay
RT	clay mineralogy
	alluvium
	overbank sediments
	argillaceous texture
	marl
	armored mud balls
	bentonite
	clays
	drilling muds
	claystone
	disposal barriers
	expansive materials
	fireclay
	flint clay
	fuller's earth
	kaolin
	loam
	mud
	mud lumps
	quick clay
	residual clays
	se
SN	As of 1981, includes use as a material in engineering geology; before 1981, also search clays for engineering applications. When of economic value, use clays.

clay (soil)
USE	Clay soils

Clay County Alabama
BT	United States
	.Alabama
	..Clay County Alabama
SN	E Alabama.

Clay County Arkansas
BT	United States
	.Arkansas
	..Clay County Arkansas
SN	Extreme NE Arkansas.

Clay County Florida
BT	United States
	.Florida
	..Clay County Florida
SN	NE Florida.

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

Clay County Illinois
BT	United States
	.Illinois
	..Clay County Illinois
RT	Iola Field
SN	S central Illinois.

Clay County Indiana
BT	Indiana
	.Clay County Indiana

Clay County Iowa
BT	United States
	.Iowa
	..Clay County Iowa
SN	NW Iowa.

Clay County Kansas
BT	United States
	.Kansas
	..Clay County Kansas
SN	N Kansas.

Clay County Kentucky
BT	United States
	.Kentucky
	..Clay County Kentucky
SN	SE Kentucky.

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

Clay County Mississippi
BT	United States
	.Mississippi
	..Clay County Mississippi
SN	E Mississippi.

Clay County Missouri
BT	United States
	.Missouri
	..Clay County Missouri
RT	Kansas City Missouri
SN	W Missouri.

Clay County Nebraska
BT	United States
	.Nebraska
	..Clay County Nebraska
SN	S Nebraska.

Clay County North Carolina
BT	United States
	.North Carolina
	..Clay County North Carolina
RT	Lake Chatuge
SN	W North Carolina.

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

Clay County Tennessee
BT	United States
	.Tennessee
	..Clay County Tennessee
SN	N Tennessee.

Clay County Texas
BT	United States
	.Texas
	..Clay County Texas
SN	N Texas.

Clay County West Virginia
BT	United States
	.West Virginia
	..Clay County West Virginia
RT	Granny Creek Field
SN	Central West Virginia.

clay liners
USE	disposal barriers

clay mineralogy
RT	adsorption
	argillaceous texture
	bentonite
	cation exchange capacity
	ceramic materials
	clathrates
	clay
	clay minerals
	clays
	crystal chemistry
	crystal growth
	crystal structure
	crystallinity
	crystallography
	differential thermal analysis
	electron microscopy
	flo

clay minerals
BT	silicates
	.sheet silicates
	..clay minerals
NT	allophane
	beidellite
	corrensite
	dickite
	halloysite
	hectorite
	illite
	imogolite
	kaolinite
	metahalloysite
	montmorillonite
	nacrite
	nontronite
	palygorskite
	rectorite
	saponite
	sepiolite
	smectite
	stevensite
	tosudite
	vermiculite
RT	clay mineralogy
	argillization
	illitization
	kaolinization
	bauxite
	amorphous materials
	argillaceous texture
	delamination
	bentonite
	K-bentonite
	citrate-bicarbonate-dithionite method
	kaolin
	differential thermal analysis
	hisingerite
	hydromica
	hydromuscovite
	me

Clay soils
BT	soils
	.Clay soils
UF	clay (soil)
RT	soil group

clay stone
USE	claystone

clays
RT	bentonite deposits
	clay
	clay mineralogy
	engineering geology
	flint clay
	fuller's earth
	insulation materials
	kaolin
	kaolin deposits
	ornamental materials
	quick clay
	refractory materials
	residual clays
	sensitive clays
	shale
	soft clays
	stiff clays
	vermiculite
SN	As of 1981, use only when of economic value; use clay for material in engineering geology. Before 1981, search clays AND deposits. Commodity. See List C.

Clays Ferry Formation
BT	Chronostratigraphic Units
	.Phanerozoic
	..Paleozoic
	...Ordovician
	....Clays Ferry Formation
RT	Kentucky
	Indiana
	Ohio
SN	Middle and Upper Ordovician. Added to Thesaurus in 1989.

claystone
BT	sedimentary rocks
	.clastic rocks
	..claystone
UF	clay stone
RT	clay
	terrigenous materials
	mudstone

Clayton County Georgia
BT	United States
	.Georgia
	..Clayton County Georgia

Clayton County Iowa
BT	United States
	.Iowa
	..Clayton County Iowa

Clayton Formation
BT	Chronostratigraphic Units
	.Phanerozoic
	..Cenozoic
	...Paleogene
	....Paleocene
	.....Clayton Formation
RT	Missouri
	Mississippi
	Alabama
	Georgia
	Tennessee
	Midway Group
SN	In Midway Group. S Alabama, SW Georgia, NE Mississippi, SE Missouri, and S Tennessee.

Clean Air Act
UF	CAA (Clean Air Act)
RT	pollution
	United States
	environmental geology
	air
	legislation
	regulations
	U. S. Environmental Protection Agency
SN	1970. Amended 1977 and 1990.

Clean Water Act
UF	CWA (Clean Water Act)
RT	pollution
	United States
	environmental geology
	water
	legislation
	polluted water
	regulations
	U. S. Environmental Protection Agency
SN	1977. Amendment to the Federal Water Pollution Control Act of 1972.

Clear Creek
RT	Colorado
SN	River in N central Colorado. May also occur in other locations. Indexed with counties and/or state and/or regions as applicable.

Clear Creek County Colorado
BT	United States
	.Colorado
	..Clear Creek County Colorado
NT	Idaho Springs Colorado
	Idaho Springs mining district
RT	Henderson Mine
SN	N central Colorado.

Clear Fork Group
BT	Chronostratigraphic Units
	.Phanerozoic
	..Paleozoic
	...Permian
	....Lower Permian
	.....Leonardian
	......Clear Fork Group
RT	Texas
SN	Central and N central Texas. Added to Thesaurus in 1985.

Clear Lake
RT	California
	geothermal fields
	Lake County California
	Modoc County California
SN	Large lake, volcanic field, and geothermal area in Lake County in NW central California. Also lakes in numerous other locations. Indexed with state and counties as applicable.

Clearfield County Pennsylvania
BT	United States
	.Pennsylvania
	..Clearfield County Pennsylvania
SN	Central Pennsylvania.

Clearwater County Idaho
BT	United States
	.Idaho
	..Clearwater County Idaho
SN	N Idaho.

Clearwater County Minnesota
BT	United States
	.Minnesota
	..Clearwater County Minnesota
SN	NW Minnesota.

Clearwater Formation
BT	Chronostratigraphic Units
	.Phanerozoic
	..Mesozoic
	...Cretaceous
	....Lower Cretaceous
	.....Clearwater Formation
RT	Alberta
	Athabasca Oil Sands
	Mannville Group
SN	In Mannville Group. Includes Wabiskaw Member. Added to Thesaurus in 1989.

Clearwater Lake
BT	Canada
	.Clearwater Lake
RT	Quebec
	British Columbia
	impact features
SN	N Quebec and E central British Columbia. Indexed with provinces as applicable. Added to Thesaurus in 1989.

Clearwater River
RT	Alberta
	Athabasca River
	Canada
	Idaho
	Minnesota
	Saskatchewan
	Snake River
	United States
SN	Tributary of the Snake River, N Idaho Panhandle. Also a tributary of the Athabasca River, NW Saskatchewan and NE Alberta, and a tributary of the Red Lake River, NW Minnesota. Indexed with states or Canadian provinces as applicable. Added to Thesaurus in 1

cleat spar
USE	ankerite

cleats
RT	coal
	coal seams
	coalbed methane
	cross fractures
	joints
	fractures
	strike
SN	System of joints found in many coal seams. Usually two systems occur at right angles. Before 1993, also search cleating. Added to Thesaurus in 1993.

cleavage
RT	axial-plane structures
	cleavage folds
	deformation
	flow cleavage
	folds
	foliation
	fracture cleavage
	lineation
	mineral cleavage
	planar deformation features
	schistosity
	slaty cleavage
	slip cleavage
	structural analysis
SN	As of 1981, restricted to use for cleavage of rocks produced by small-scale deformation or metamorphism. Use mineral cleavage for minerals. Before 1978, term also referred to cleavage folds.

cleavage folds
BT	folds
	.cleavage folds
UF	shear-cleavage folds
RT	cleavage
SN	Before 1978, also search cleavage AND folds.

Cleburne County Alabama
BT	United States
	.Alabama
	..Cleburne County Alabama
SN	E Alabama.

Cleburne County Arkansas
BT	United States
	.Arkansas
	..Cleburne County Arkansas
SN	N central Arkansas.

Cleft Ridge
USE	Cleft Segment

Cleft Segment
BT	Pacific Ocean
	.North Pacific
	..Northeast Pacific
	...Juan de Fuca Ridge
	....Cleft Segment
UF	Cleft Ridge
SN	This term has multiple hierarchies.

Clementine Program
RT	extraterrestrial geology
	Moon
	planetology
	remote sensing
SN	Spacecraft sent into lunar orbit for several months in 1994.

Clermont County Ohio
BT	United States
	.Ohio
	..Clermont County Ohio

Clermont France
BT	Europe
	.Western Europe
	..France
	...Oise France
	....Clermont France
SN	City in N France.

Clermont-Ferrand France
BT	Europe
	.Western Europe
	..France
	...Puy-de-Dome France
	....Clermont-Ferrand France
SN	City in S central France.

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

Cleveland County North Carolina
BT	United States
	.North Carolina
	..Cleveland County North Carolina
SN	SW North Carolina.

Cleveland County Oklahoma
BT	United States
	.Oklahoma
	..Cleveland County Oklahoma
SN	Central Oklahoma.

Cleveland Member
BT	Chronostratigraphic Units
	.Phanerozoic
	..Paleozoic
	...Devonian
	....Upper Devonian
	.....Cleveland Member
RT	Ohio
	Ohio Shale
SN	In Ohio Shale. Upper Devonian. N Ohio. Overlies Chagrin Member; underlies Bedford Shale. Added to Thesaurus in 1993.

Cleveland Ohio
BT	United States
	.Ohio
	..Cuyahoga County Ohio
	...Cleveland Ohio
SN	City on Lake Erie in N Ohio.

cliff of displacement
USE	fault scarps

cliffs
RT	bluffs
	cuestas
	erosion features
	fault scarps
	fluvial features
	geomorphology
	gullies
	scarps
	shore features
	shorelines
	slopes
	talus slopes

climate
RT	alpine environment
	arctic environment
	arid environment
	ash clouds
	atmosphere
	atmospheric precipitation
	Boreal
	climate change
	climate effects
	climatic controls
	climatologic maps
	cycles
	drought
	elevation
	equatorial region
	factors
	Gaia hypothesis
	general cir
SN	Used for climate in historical times. For prehistoric climate, use paleoclimatology.

climate change
UF	climatic change
RT	climate
	paleoclimatology
	effects
	greenhouse effect
	climate effects
	climatic controls
	global change
	global warming
SN	For modern or past (paleoclimate) change. Before 1998, also search (climate OR paleoclimatology) AND (changes OR climate effects). See global change.

climate effects
RT	climate
	climate change
	effects
	global warming
	orbital forcing
	relief effects
SN	Not to be used for climates of the past (paleoclimatology). See climate change. Added to Thesaurus in 1981.

climate maps
USE	climatologic maps

climate-induced circulation
RT	circulation
	ocean circulation
SN	Before 1978, also search oceans AND circulation AND climate induced or climate-induced.

climatic change
USE	climate change

climatic controls
RT	climate
	climate change
	controls
	ecology
	erosion
	general circulation models
	geomorphologic controls
	global warming
	orbital forcing
	sedimentation
SN	Before 1993, also search climate and controls. Applies to historic period. Added to Thesaurus in 1993.

climatic orbital forcing
USE	orbital forcing

climatologic maps
BT	maps
	.climatologic maps
UF	climate maps
	climatological maps
RT	climate
	paleoclimatology
	paleoclimate maps
SN	Before 1985, also search climate AND maps. Added to Thesaurus in 1985.

climatological maps
USE	climatologic maps

climatology, paleo-
USE	paleoclimatology

Climax Colorado
BT	United States
	.Colorado
	..Lake County Colorado
	...Climax Colorado
SN	Village in central Colorado.

Climax Mine
RT	Colorado
	Lake County Colorado
	mines
	molybdenum ores
SN	Molybdenum porphyry. Lake County Colorado. Also occurs in other locations. Indexed with location and commodities as applicable. Added to Thesaurus in 1993.

Climax Porphyry
BT	Chronostratigraphic Units
	.Phanerozoic
	..Cenozoic
	...Tertiary
	....Climax Porphyry
UF	Climax Stock
RT	Colorado
SN	Added to Thesaurus in 1985.

Climax Stock
USE	Climax Porphyry

Clinch County Georgia
BT	United States
	.Georgia
	..Clinch County Georgia

Clinch Sandsto

Clinch Sandstone
BT	Chronostratigraphic Units
	.Phanerozoic
	..Paleozoic
	...Silurian
	....Clinch Sandstone
RT	Virginia
	West Virginia
	Tennessee
SN	E Tennessee, SW Virginia and S West Virginia. Lower and Middle Silurian. Includes Hagan Shale Member. Added to Thesaurus in 1989.

clinoamphibole
BT	silicates
	.chain silicates
	..amphibole group
	...clinoamphibole
NT	actinolite
	amosite
	arfvedsonite
	crocidolite
	crossite
	cummingtonite
	edenite
	ferrohastingsite
	glaucophane
	grunerite
	hastingsite
	hornblende
	kaersutite
	magnesioriebeckite
	nephrite
	pargasite
	richterite
	riebeckite
	tirodite
	tremolite
	tschermakite

clinochlore
BT	silicates
	.sheet silicates
	..chlorite group
	...clinochlore

clinoenstatite
BT	silicates
	.chain silicates
	..pyroxene group
	...clinopyroxene
	....clinoenstatite
RT	clinohypersthene

clinoforms
SN	Not a valid term for GeoRef. See specific feature under bottom features or environment of interest under depositional environment. Also see continental slope if applicable.

clinohumite
BT	halides
	.fluorides
	..clinohumite
BT	silicates
	.orthosilicates
	..nesosilicates
	...humite group
	....clinohumite
RT	titanoclinohumite
SN	This term has multiple hierarchies.

clinohypersthene
BT	silicates
	.chain silicates
	..pyroxene group
	...clinopyroxene
	....clinohypersthene
RT	clinoenstatite
SN	May be considered a compositional intermediary between clinoenstatite and clinoferrosilite.

clinoptilolite
BT	silicates
	.framework silicates
	..zeolite group
	...clinoptilolite
RT	heulandite

clinopyroxene
BT	silicates
	.chain silicates
	..pyroxene group
	...clinopyroxene
NT	aegirine
	augite
	chrome diopside
	clinoenstatite
	clinohypersthene
	diopside
	fassaite
	hedenbergite
	jadeite
	johannsenite
	kunzite
	omphacite
	pigeonite
	salite
	spodumene
	titanaugite

clinopyroxenite
BT	igneous rocks
	.plutonic rocks
	..ultramafics
	...clinopyroxenite
RT	pyroxenite

clinozoisite
BT	silicates
	.orthosilicates
	..sorosilicates
	...epidote group
	....clinozoisite
RT	aluminosilicates
	zoisite

Clinton County Illinois
BT	United States
	.Illinois
	..Clinton County Illinois
SN	S Illinois.

Clinton County Indiana
BT	Indiana
	.Clinton County Indiana
SN	Central Indiana.

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

Clinton County Kentucky
BT	United States
	.Kentucky
	..Clinton County Kentucky
SN	S Kentucky.

Clinton County Michigan
BT	United States
	.Michigan
	..Michigan Lower Peninsula
	...Clinton County Michigan
RT	Lansing Michigan
SN	S central Michigan.

Clinton County Missouri
BT	United States
	.Missouri
	..Clinton County Missouri
SN	NW Missouri.

Clinton County New York
BT	United States
	.New York
	..Clinton County New York
SN	Extreme NE New York.

Clinton County Ohio
BT	United States
	.Ohio
	..Clinton County Ohio
SN	SW Ohio.

Clinton County Pennsylvania
BT	United States
	.Pennsylvania
	..Clinton County Pennsylvania
RT	Nittany Valley
SN	N central Pennsylvania.

Clinton Group
BT	Chronostratigraphic Units
	.Phanerozoic
	..Paleozoic
	...Silurian
	....Middle Silurian
	.....Clinton Group
RT	Ontario
	Virginia
	Ohio
	Pennsylvania
	New York
	Maryland
	West Virginia
	Michigan
	Keefer Sandstone
	Rochester Formation
	Rose Hill Formation
SN	Includes Willowvale Shale, Rose Hill Formation, Keefer Sandstone, Rochester Formation, Osgood Formation, Laurel Formation, Waldron Formation, Reynales Formation, Irondequoit Formation, Decew Formation, Neahga Formation, Thorold Formation, Maplewood Format

clintonite
BT	silicates
	.sheet silicates
	..mica group
	...clintonite
UF	xanthophyllite

Clipperton fracture zone
BT	Pacific Ocean
	.North Pacific
	..Northeast Pacific
	...Clipperton fracture zone
RT	Equatorial Pacific
	DSDP Site 68
	Leg 8
SN	S of Clarion fracture zone, N of Galapagos Rift. This term has multiple hierarchies. Added to Thesaurus in 1985.

Clitheroe England
BT	Europe
	.Western Europe
	..United Kingdom
	...Great Britain
	....England
	.....Lancashire England
	......Clitheroe England
SN	City E of Liverpool in E Lancashire, NW England.

Cloridorme Formation
BT	Chronostratigraphic Units
	.Phanerozoic
	..Paleozoic
	...Ordovician
	....Middle Ordovician
	.....Cloridorme Formation
RT	Canada
	Quebec
SN	Gaspe Peninsula.

closed fractures
BT	fractures
	.closed fractures
SN	Before 1978, also search fractures AND closed.

closed mines
USE	abandoned mines

closed systems
RT	open systems
	systems
SN	Used as a general term.

Closepet Granite
BT	Asia
	.Indian Peninsula
	..India
	...Karnataka India
	....Closepet Granite
RT	Archean
	Dharwars
	Peninsular Gneiss
SN	Archean. Karnataka, India. Intrudes Dharwars, Peninsular Gneiss, Champion Gneiss, and Charnockite Series. Added to Thesaurus in 1993.

Cloud County Kansas
BT	United States
	.Kansas
	..Cloud County Kansas
SN	N central Kansas.

clouds
RT	droplets
	meteorology
	raindrops
	water

clouds, ash
USE	ash clouds

Clough Formation
BT	Chronostratigraphic Units
	.Phanerozoic
	..Paleozoic
	...Silurian
	....Lower Silurian
	.....Clough Formation
RT	Vermont
	Massachusetts
	New Hampshire
SN	N central Massachusetts, W New Hampshire and SE Vermont. Added to Thesaurus in 1989.

Cloverly Formation
BT	Chronostratigraphic Units
	.Phanerozoic
	..Mesozoic
	...Cretaceous
	....Lower Cretaceous
	.....Cloverly Formation
RT	Utah
	Wyoming
	Montana
	Colorado
SN	Added to Thesaurus in 1989.

Clovis
BT	Chronostratigraphic Units
	.Phanerozoic
	..Cenozoic
	...Quaternary
	....Clovis
RT	Upper Pleistocene
	archaeology
	artifacts
	lower Holocene
SN	An informal archaeological subdivision of the Quaternary, based on artifacts. Upper Pleistocene-lower Holocene.

Cluj Romania
BT	Europe
	.Southern Europe
	..Romania
	...Transylvania
	....Cluj Romania
NT	Gilau Romania
SN	County and city in central Transylvania.

cluster analysis
BT	statistical analysis
	.cluster analysis
RT	analysis
	mathematical geology

Clymeniida
BT	Invertebrata
	.Mollusca
	..Cephalopoda
	...Tetrabranchiata
	....Ammonoidea
	.....Clymeniida

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