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Br
USE	bromine

Braarudosphaeridae
BT	Plantae
	.algae
	..nannofossils
	...Braarudosphaeridae
RT	microfossils
SN	Indexed with microfossils if applicable.

Brabant Belgium
BT	Europe
	.Western Europe
	..Belgium
	...Brabant Belgium
NT	Brussels Belgium
	Louvain Belgium
SN	Province in central Belgium.

Brabant Massif
BT	Europe
	.Western Europe
	..Belgium
	...Brabant Massif

Brachiopoda
BT	Invertebrata
	.Brachiopoda
NT	Articulata
	Inarticulata
RT	reef builders

Brachiopterygii
BT	Chordata
	.Vertebrata
	..Pisces
	...Osteichthyes
	....Brachiopterygii

Brachyura
BT	Invertebrata
	.Arthropoda
	..Mandibulata
	...Crustacea
	....Malacostraca
	.....Brachyura
SN	Suborder.

Bracken County Kentucky
BT	United States
	.Kentucky
	..Bracken County Kentucky

brackish water
RT	brackish-water environment
	ecology
	hydrochemistry
	paleosalinity
	salinity
	salt lakes
	salt water
	sea water
	water
SN	Before 1978, also search brackish.

brackish-water environment
RT	aquatic environment
	brackish water
	deep-water environment
	depositional environment
	ecology
	fresh-water environment
	salinity
	salt marshes
	swamps
	tidal flats
SN	Before 1978, also search brackish or brackish water.

Bracklesham Beds
BT	Chronostratigraphic Units
	.Phanerozoic
	..Cenozoic
	...Paleogene
	....Bracklesham Beds
RT	England
SN	Added to Thesaurus in 1989.

Brad Romania
BT	Europe
	.Southern Europe
	..Romania
	...Transylvania
	....Brad Romania
SN	Town in Hunedoara County in W Romania.

Bradford County Florida
BT	United States
	.Florida
	..Bradford County Florida
SN	N Florida.

Bradford County Pennsylvania
BT	United States
	.Pennsylvania
	..Bradford County Pennsylvania
RT	Chemung River
SN	NE Pennsylvania.

Bradley County Arkansas
BT	United States
	.Arkansas
	..Bradley County Arkansas

Bradley County Tennessee
BT	United States
	.Tennessee
	..Bradley County Tennessee

Bradyodonti
BT	Chordata
	.Vertebrata
	..Pisces
	...Chondrichthyes
	....Elasmobranchii
	.....Bradyodonti

Braganca Portugal
BT	Europe
	.Southern Europe
	..Iberian Peninsula
	...Portugal
	....Braganca Portugal
RT	Tras-os-Montes
SN	District in NE Portugal. Also a city.

Brahmaputra River
BT	Asia
	.Brahmaputra River
RT	Indian Peninsula
	India
	China
	Bangladesh
	Xizang China
SN	Rises in the Kailas Range of SW Xizang; it flows E across S Xizang, then S, SW, and again S through Bangladesh where it becomes the Jamuna River which merges with the Ganges River in the Ganges-Brahmaputra Delta on the Bay of Bengal. Indexed with Xizang C

braided channels
USE	braided streams

braided streams
BT	streams
	.braided streams
UF	anastomosing streams
	braided channels
RT	sedimentation
	geomorphology
	fluvial features
	gravel-bed streams
	channels
SN	Indexed with fluvial features as applicable.

Braila Romania
BT	Europe
	.Southern Europe
	..Romania
	...Walachia
	....Braila Romania
SN	City and county in NE Walachia.

brain cases
USE	craniums

braincases
USE	craniums

brains
USE	skulls

Brallier Shale
BT	Chronostratigraphic Units
	.Phanerozoic
	..Paleozoic
	...Devonian
	....Upper Devonian
	.....Brallier Shale
RT	Virginia
	Pennsylvania
	West Virginia
SN	In Susquehanna Group. Central Pennsylvania, Virginia and West Virginia. Added to Thesaurus in 1985.

Bramsche Germany
BT	Europe
	.Central Europe
	..Germany
	...Lower Saxony Germany
	....Bramsche Germany
SN	Town in SW Lower Saxony.

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

Branchiopoda
BT	Invertebrata
	.Arthropoda
	..Mandibulata
	...Crustacea
	....Branchiopoda
NT	Cladocera
UF	Conchostraca

Brandenburg Germany
BT	Europe
	.Central Europe
	..Germany
	...Brandenburg Germany
NT	Berlin Germany
	Cottbus Germany
	Doberlug Germany
	Potsdam Germany
RT	North German Plain
	Frankfurt Germany
	Oder Valley
SN	State in NE Germany. Before 1993, used as region. Includes the town on the Havel River.

Brandenburg Stade
BT	Chronostratigraphic Units
	.Phanerozoic
	..Cenozoic
	...Quarternary
	....Pleistocene
	.....Upper Pleistocene
	......Weichselian
	.......Brandenburg Stade
SN	Europe. Before 1978, also search Brandenburg.

Brandon
RT	England
	Warwickshire England
SN	Region in Warwickshire, central England. After 1992, see Brandon Manitoba for city in SW Manitoba. Before 1989, also included use for the town in Vermont; now use specific city-state term when applicable. Indexed with Warwickshire England or regions as ap

Brandon Manitoba
BT	Canada
	.Western Canada
	..Manitoba
	...Brandon Manitoba
SN	City in SW Manitoba.

Brandon Stade
BT	Chronostratigraphic Units
	.Phanerozoic
	..Cenozoic
	...Quarternary
	....Pleistocene
	.....Upper Pleistocene
	......Weichselian
	.......Brandon Stade
SN	Europe. Before 1978, also search Brandon.

Brandon Vermont
BT	United States
	.Vermont
	..Rutland County Vermont
	...Brandon Vermont
SN	Town in W Vermont.

brannerite
BT	oxides
	.brannerite
RT	uranium ores

Bransfield Strait
BT	Antarctic Ocean
	.Bransfield Strait
RT	Bellingshausen Sea
	Weddell Sea
SN	Antarctic Ocean between South Shetland Islands and Antarctic Peninsula, Antarctica. Connects Weddell Sea on the Atlantic Ocean side with Bellingshausen Sea, Pacific Ocean side. Added to Thesaurus in 1993.

Brant County Ontario
BT	Canada
	.Eastern Canada
	..Ontario
	...Brant County Ontario

Brantley County Georgia
BT	United States
	.Georgia
	..Brantley County Georgia

Brasov Romania
BT	Europe
	.Southern Europe
	..Romania
	...Transylvania
	....Brasov Romania
NT	Hoghiz Romania
SN	City and county in SE Transylvania. From 1950-1960, the city was named Stalin.

Brassfield Formation
BT	Chronostratigraphic Units
	.Phanerozoic
	..Paleozoic
	...Silurian
	....Lower Silurian
	.....Brassfield Formation
RT	Kentucky
	Illinois
	Indiana
	Ohio
	Tennessee
	Arkansas
SN	Considered to consist of lower dolomitic limestone, including Whitfieldella bed, and Plum Creek Clay Member above. In central N Arkansas, S Indiana, SW Illinois, central Kentucky, SW Ohio, and S Tennessee.

Bratislava Slovakia
BT	Europe
	.Central Europe
	..Slovakia
	...Bratislava Slovakia
SN	City and region on the Danube River in SW Slovakia. Before 1995, Bratislava Czechoslovakia was also used.

braunite
BT	silicates
	.orthosilicates
	..nesosilicates
	...braunite
RT	manganese ores

Braunschweig Germany
USE	Brunswick Germany

Bravais lattice
USE	lattice

bravoite
BT	sulfides
	.bravoite
RT	pyrite

Brawley Fault
BT	United States
	.California
	..Imperial County California
	...Brawley Fault
UF	Brawley seismic zone
SN	S California. Added to Thesaurus in 1989.

Brawley seismic zone
USE	Brawley Fault

Braxton County West Virginia
BT	United States
	.West Virginia
	..Braxton County West Virginia

Brazil
BT	South America
	.Brazil
NT	Acre Brazil
	Alagoas Brazil
	Amapa Brazil
	Amazonas Brazil
	Araripe Basin
	Bahia Brazil
	Borborema
	Brazilian Shield
	Ceara Brazil
	Espirito Santo Brazil
	Goias Brazil
	Maranhao Basin
	Maranhao Brazil
	Mato Grosso Brazil
	Minas Gerais Brazil
	Para Brazil
	Paraiba Brazil
	Parana Brazil
	Parnaiba Basin
	Pelotas Basin
	Pernambuco Brazil
	Piaui Brazil
	Recife-Joao Pessoa
	Rio de Janeiro Brazil
	Rio Grande do Norte Brazil
	Rio Grande do Sul Brazil
	Rondonia Brazil
	Roraima Brazil
	Santa Catarina Brazil
	Sao Francisco Basin
	Sao Francisco Craton
	Sao Paulo Brazil
	Sergipe Brazil
	Sergipe-Alagoas Basin
	Serra do Espinhaco
	Serra do Mar
	Tocantins River region
RT	Acungui Group
	Altiplano
	Amazon Basin
	Amazon River
	Areado Formation
	Colorado River
	Barreiras Formation
	Bambui Group
	Bauru Formation
	Botucatu Formation
	Estrada Nova Formation
	Guiana Basin
	Guyana Shield
	Irati Formation
	Itarare Subgroup
	Minas Series
	Parana Ba

Brazil Basin
BT	Atlantic Ocean
	.South Atlantic
	..Brazil Basin
RT	Antarctic Bottom Water
	DSDP Site 515
	Vema Channel
	Leg 39
	DSDP Site 19
	DSDP Site 20
	DSDP Site 21
	DSDP Site 23
	DSDP Site 24
	DSDP Site 355
	Leg 3
	Leg 72
SN	In SW Atlantic. Added to Thesaurus in 1989.

Brazilian Cycle
RT	cycles
	tectonics
SN	Tectonic cycle. Added to Thesaurus in 1989.

Brazilian Shield
BT	South America
	.Brazil
	..Brazilian Shield
UF	Amazonian Shield
RT	Parana Brazil
	Sao Paulo Brazil
	Minas Gerais Brazil
	Bahia Brazil
	Para Brazil
	Maranhao Brazil
	Mato Grosso Brazil
	Goias Brazil
	Santa Catarina Brazil
SN	The Brazilian uplands of N central, E central, and S Brazil. Indexed with states as applicable.

Brazoria County Texas
BT	United States
	.Texas
	..Brazoria County Texas
NT	Pleasant Bayou
SN	On Gulf of Mexico in SE Texas.

Brazos County Texas
BT	United States
	.Texas
	..Brazos County Texas
RT	Iola Field
SN	E central Texas.

Brazos River
BT	United States
	.Texas
	..Brazos River
SN	Central Texas.

Brazzaville Congo
BT	Africa
	.Central Africa
	..Congo
	...Brazzaville Congo
SN	City on the Congo River across from Kinshasa.

break (knickpoint)
USE	knickpoints

breakers
USE	breaking waves

breaking strength
USE	fracture strength

breaking waves
BT	ocean waves
	.breaking waves
UF	breakers
RT	waves
SN	Before 1978, also search waves AND breaking.

breakouts
USE	borehole breakouts

breakthrough curves
RT	concentration
	ground water
	preferential flow
	soils
	solute transport
	solutes
	tracers
SN	Measure solute concentration of fluids entering a soil column.

breakwaters
BT	marine installations
	.breakwaters
UF	water-break
RT	engineering geology
	shorelines
	tombolos

Breathitt County Kentucky
BT	United States
	.Kentucky
	..Breathitt County Kentucky
SN	E central Kentucky.

Breathitt Formation
BT	Chronostratigraphic Units
	.Phanerozoic
	..Paleozoic
	...Carboniferous
	....Pennsylvanian
	.....Middle Pennsylvanian
	......Breathitt Formation
RT	Kentucky
	Pottsville Group
SN	In Pottsville Group. In SE Kentucky.

breccia
BT	sedimentary rocks
	.clastic rocks
	..breccia
NT	tectonic breccia
	volcanic breccia
UF	rubblerock
RT	tectonics
	faults
	agglomerate
	conglomerate
	gravel
	structural analysis
	sediments
	EET 87521
	terrigenous materials
	meteor craters
	breccia pipes
	brecciation
	gouge
	lunar breccia
	megabreccia
	microbreccia
	shear zones
	slickensides
	suevite
SN	As of 1981, use lunar breccia for breccia on the Moon.

breccia pipes
BT	intrusions
	.pipes
	..breccia pipes
RT	volcanism
	breccia
	volcanoes
	volcanic rocks
	diatremes
	plugs
	volcanic breccia

brecciation
RT	breccia
	processes

Breckinridge County Kentucky
BT	United States
	.Kentucky
	..Breckinridge County Kentucky

Brecknock (shire)
USE	Brecknockshire Wales

Brecknockshire Wales
BT	Europe
	.Western Europe
	..United Kingdom
	...Great Britain
	....Wales
	.....Powys Wales
	......Brecknockshire Wales
UF	Brecknock (shire)
	Breconshire Wales
SN	Former county SE Wales. As of April 1974, part of Powys. Before 1993, also search Brecon.

Breconshire Wales
USE	Brecknockshire Wales

Breidamerkurjokull
BT	Europe
	.Western Europe
	..Iceland
	...Breidamerkurjokull
SN	Glacier.

Bremen Germany
BT	Europe
	.Central Europe
	..Germany
	...Lower Saxony Germany
	....Bremen Germany
RT	Weser River
SN	City state in NW Germany.

Bremer County Iowa
BT	United States
	.Iowa
	..Bremer County Iowa

Brenham Texas
BT	United States
	.Texas
	..Washington County Texas
	...Brenham Texas
SN	City in SE central Texas.

Brent Crater
BT	Canada
	.Eastern Canada
	..Ontario
	...Nipissing District Ontario
	....Brent Crater
RT	impact features
SN	Meteor crater at Brent in Algonquin Provincial Park E of Georgian Bay.

Brent Group
BT	Chronostratigraphic Units
	.Phanerozoic
	..Mesozoic
	...Jurassic
	....Middle Jurassic
	.....Bajocian
	......Brent Group
RT	Broom Formation
	Etive Formation
	Rannoch Formation
	Ness Formation
	North Sea
	Tarbert Formation
SN	Added to Thesaurus in 1989.

Brescia Italy
BT	Europe
	.Southern Europe
	..Italy
	...Lombardy Italy
	....Brescia Italy
SN	City and province in E Lombardy.

Breslau Poland
USE	Wroclaw Poland

Brest Basin
BT	Europe
	.Brest Basin
RT	Poland
	Ukraine
	Belarus
SN	Named after city of Brest in SW Belarus. Indexed with Poland and former Soviet republics as applicable.

Brest Belarus
BT	Europe
	.Belarus
	..Brest Belarus
SN	City in SW Belarus. This term has multiple hierarchies.

Brest France
BT	Europe
	.Western Europe
	..France
	...Finistere France
	....Brest France
SN	City on the Atlantic in W France.

Brevard County Florida
BT	United States
	.Florida
	..Brevard County Florida
NT	Cape Canaveral
SN	On the Atlantic Ocean in central Florida.

Brevard fault zone
USE	Brevard Zone

Brevard Zone
BT	United States
	.Brevard Zone
UF	Brevard fault zone
RT	South Carolina
	Appalachians
	Alabama
	North Carolina
	West Virginia
	Georgia
	Southern Appalachians
SN	S and Central Appalachians. Indexed with Appalachians and states as applicable.

Brewster County Texas
BT	United States
	.Texas
	..Brewster County Texas
NT	Big Bend National Park
	Mule Ear Diatreme
	Terlingua Texas
RT	Rattlesnake Mountain
	Christmas Mountains
	Davis Mountains
	Glass Mountains
SN	Extreme SW Texas.

Brezno Slovakia
BT	Europe
	.Central Europe
	..Slovakia
	...Brezno Slovakia
SN	Town in central Slovakia. Before 1995, Brezno Czechoslovakia was also used.

Briancon France
BT	utes-Alpes France
	.Briancon France
SN	Town in SE France.

Briancon Zone
USE	Brianconnais Zone

Brianconnais Zone
BT	Europe
	.Brianconnais Zone
UF	Briancon Zone
	Brianconnaise Zone
RT	Mesozoic
	Jurassic
	Cretaceous
	Tertiary
	Paleocene
	Eocene
	Permian
	Italy
	France
	Alps
SN	SE France and NW Italy. Indexed with countries as applicable.

Brianconnaise Zone
USE	Brianconnais Zone

briartite
BT	sulfides
	.briartite

brick clays
SN	Not a valid term for GeoRef. Use clays.

brides
NT	Inner Hebrides
	Outer Hebrides

Bridge Creek Limestone Member
BT	Chronostratigraphic Units
	.Phanerozoic
	..Mesozoic
	...Cretaceous
	....Upper Cretaceous
	.....Bridge Creek Limestone Member
RT	Colorado
	Kansas
	Greenhorn Limestone
SN	Of Greenhorn Limestone. SE Colorado and W Kansas. Added to Thesaurus in 1989.

Bridger Formation
BT	Chronostratigraphic Units
	.Phanerozoic
	..Cenozoic
	...Paleogene
	....Eocene
	.....Bridger Formation
RT	Utah
	Wyoming
	Colorado
SN	Middle and upper? Eocene. SW Wyoming, NW Colorado and NE Utah. Added to Thesaurus in 1985.

Bridger Range
BT	United States
	.U. S. Rocky Mountains
	..Bridger Range
BT	United States
	.Montana
	..Bridger Range
RT	Meagher County Montana
	Gallatin County Montana
	Park County Montana
SN	SW Montana. This term has multiple hierarchies. Indexed with counties as applicable. Added to Thesaurus in 1985.

Bridgerian
BT	Chronostratigraphic Units
	.Phanerozoic
	..Cenozoic
	...Paleogene
	....Eocene
	.....Bridgerian
SN	North America.

bridges
RT	abutments
	engineering geology
	foundations
	geomorphology
	highways
	natural curiosities
SN	Restricted; used for the man-made structures. For the naturally occurring, archlike features, use natural curiosities.

brief report
USE	report

Brigham Group
BT	Chronostratigraphic Units
	.Phanerozoic
	..Paleozoic
	...Cambrian
	....Brigham Group
RT	Idaho
	Utah
	Washington
SN	Lower and Middle Cambrian. SE Idaho, NE Utah and NE Washington. Added to Thesaurus in 1989.

Bright Angel Shale
BT	Chronostratigraphic Units
	.Phanerozoic
	..Paleozoic
	...Cambrian
	....Middle Cambrian
	.....Bright Angel Shale
RT	California
	Nevada
	Arizona
SN	N Arizona, SE California and S Nevada. Added to Thesaurus in 1985.

bright spots
SN	Not a valid term for GeoRef. As of 1993, use hydrocarbon indicators if applicable.

brightness
UF	luminance
RT	properties
	remote sensing
	albedo
	reflectance
	optical properties
	luminescence
	surface properties
SN	Added to Thesaurus in 1995.

Brillouin spectra
BT	spectra
	.Brillouin spectra
RT	spectroscopy
	acoustical methods
	crystallography
	wave dispersion
	vibrational spectra
	thermal analysis data
	vibration
SN	Data from Brillouin spectroscopy. Also search Brillouin scattering if applicable. Added to Thesaurus in 1995.

BRIM
UF	Black River-Matheson Program
RT	Ontario
	Cochrane District Ontario
	programs
SN	Acronym for program in Cochrane District, Ontario. Added to Thesaurus in 1989.

Brindisi Italy
BT	Europe
	.Southern Europe
	..Italy
	...Apulia Italy
	....Brindisi Italy
SN	City and province on the S Adriatic Sea.

brine
USE	brines

brines
UF	brine
RT	hydrochemistry
	geothermal systems
	salt lakes
	salt water
	sea water
	bromine
	bromine deposits
	desalinization
	geothermal energy
	iodine
	iodine deposits
	mineral waters
	salt
	salt-water intrusion
	thermal waters

Brioverian
BT	Chronostratigraphic Units
	.Precambrian
	..Proterozoic
	...Neoproterozoic
	....Brioverian
SN	Europe.

Brisbane Australia
BT	Australasia
	.Australia
	..Queensland Australia
	...Brisbane Australia
SN	City in extreme SE Queensland.

Briscoe County Texas
BT	United States
	.Texas
	..Briscoe County Texas

Bristol Bay
BT	Pacific Ocean
	.North Pacific
	..Bering Sea
	...Bristol Bay
BT	Pacific Ocean
	.North Pacific
	..Northeast Pacific
	...Bristol Bay
SN	Between SW Alaskan mainland and Alaska Peninsula. This term has multiple hierarchies.

Bristol Channel
BT	Europe
	.Western Europe
	..United Kingdom
	...Great Britain
	....Bristol Channel
RT	England
	Wales
	Swansea Bay
SN	Arm of Atlantic Ocean. Indexed with England and/or Wales.

Bristol County Massachusetts
BT	United States
	.Massachusetts
	..Bristol County Massachusetts

Bristol County Rhode Island
BT	United States
	.Rhode Island
	..Bristol County Rhode Island

Bristol England
BT	Europe
	.Western Europe
	..United Kingdom
	...Great Britain
	....England
	.....Avon England
	......Bristol England
RT	Gloucestershire England
SN	City on the Bristol Channel in SW central England.

britholite
BT	phosphates
	.britholite
BT	silicates
	.orthosilicates
	..britholite
SN	This term has multiple hierarchies.

British Columbia
BT	Canada
	.Western Canada
	..British Columbia
NT	Albert Canyon British Columbia
	Alice Arm British Columbia
	Atlin British Columbia
	Bowser Basin
	Cariboo Mountains
	Crowsnest Pass
	Dogtooth Mountains
	Endako British Columbia
	Esplanade Range
	Fernie Basin
	Fraser River delta
	Guichon Creek Batholith
	Hope British Columbia
	Kamloops British Columbia
	Kimberley British Columbia
	Kootenay Lake
	Manning Park
	Mount Meager
	Omineca Mountains
	Pinchi Lake
	Prince Rupert British Columbia
	Princeton British Columbia
	Queen Charlotte Islands
	Queen Charlotte Sound
	Revelstoke British Columbia
	Rossland British Columbia
	Saanich Inlet
	Salmo British Columbia
	Sifton Basin
	Skeena Mountains
	Slocan mining camp
	Smithers British Columbia
	Sustut Basin
	Tofino Basin
	Topley Intrusions
	Tulameen coal area
	Vancouver British Columbia
	Vancouver Island
	Ware British Columbia
RT	Alexander Terrane
	Altyn Limestone
	Banff Formation
	Aldridge Formation
	Belt Basin
	Belt Sup

British Geological Survey
BT	government agencies
	.survey organizations
	..British Geological Survey
RT	United Kingdom

British Guiana
USE	Guyana

British Honduras
USE	Belize

British Institutes Reflection Profiling Syndicate
USE	BIRPS

British Museum
UF	BM (NH)
	Natural History Museum of London
RT	England
	museums
SN	Includes the natural history museum. Added to Thesaurus in 1985.

British North Borneo
USE	Sabah Malaysia

British Somaliland
USE	Somali Republic

British Virgin Islands
BT	Caribbean region
	.West Indies
	..Antilles
	...Lesser Antilles
	....Virgin Islands
	.....British Virgin Islands
NT	Anegada Island
RT	United Kingdom
SN	Virgin Islands excluding those of the United States. Before 1978, also search Virgin Islands for British Virgin Islands.

Brittany
BT	Europe
	.Western Europe
	..France
	...Brittany
RT	Finistere France
	Cotes-du-Nord France
	Morbihan France
SN	Region and former province occupying peninsula between English Channel and Bay of Biscay.

brittle deformation
BT	deformation
	.brittle deformation
UF	brittle fracture
RT	tectonics
	structural analysis
	anelasticity
	fractures
	brittle materials
	brittleness
	cataclasis
SN	Added to Thesaurus in 1985.

brittle fracture
USE	brittle deformation

brittle materials
RT	brittle deformation
	brittleness
	deformation
	materials
	rock mechanics
SN	Added to Thesaurus in 1989.

brittleness
RT	brittle deformation
	brittle materials
	deformation
	mechanical properties
	rigidity
	rock mechanics
	strain
	stress
SN	Added to Thesaurus in 1989.

Brive Basin
BT	Europe
	.Western Europe
	..France
	...Brive Basin
UF	Brive-la-Gaillarde Basin
RT	Correze France
SN	S central France. Also search Brive or Brive-la-Gaillarde if applicable. Indexed with Correze France if applicable.

Brive-la-Gaillarde Basin
USE	Brive Basin

Brno Czech Republic
BT	Europe
	.Central Europe
	..Czech Republic
	...Moravia
	....Brno Czech Republic
SN	City in S central Moravia. Before 1995, Brno Czechoslovakia was also used.

Broach India
BT	Asia
	.Indian Peninsula
	..India
	...Gujarat India
	....Broach India
UF	Bharuch India
SN	City and district in SE Gujarat, W India.

broad band spectra
USE	broad-band spectra

broad-band spectra
UF	broad band spectra
	broadband spectra
RT	TERRAscope
	spectra
	satellite methods
	electromagnetic methods
	frequency
SN	Added to Thesaurus in 1993.

broadband spectra
USE	broad-band spectra

Broadlands
RT	geothermal fields
	North Island
	New Zealand
	Taupo volcanic zone
	Wairakei
SN	Geothermal field. Central North Island, New Zealand. Indexed with North Island and New Zealand as applicable.

Broadwater County Montana
BT	United States
	.Montana
	..Broadwater County Montana
RT	Big Belt Mountains
SN	W central Montana.

brochantite
BT	sulfates
	.brochantite

Brocken Massif
BT	Europe
	.Central Europe
	..Germany
	...Brocken Massif
RT	Saxony-Anhalt Germany
	Harz Mountains
SN	In Harz Mountains in central Germany.

Brockman Iron Formation
BT	Chronostratigraphic Units
	.Precambrian
	..Brockman Iron Formation
RT	Australia
	Western Australia
	Wittenoom Gorge
SN	Wittenoom Gorge area in NW Western Australia.

Broegger Peninsula
USE	Brogger Peninsula

Brogger Peninsula
BT	Arctic region
	.Svalbard
	..Spitsbergen
	...Spitsbergen Island
	....Brogger Peninsula
UF	Broegger Peninsula
	Broggerhalvoya
SN	On the Island of Spitsbergen.

Broggerhalvoya
USE	Brogger Peninsula

Broken Bay
BT	Australasia
	.Australia
	..New South Wales Australia
	...Broken Bay
RT	Southwest Pacific
SN	Inlet of Pacific Ocean, N of Sydney, E New South Wales.

Broken Hill
RT	Broken Hill Block
	metal ores
	New South Wales Australia
SN	City and metals mining center in W New South Wales. As of 1993, use Broken Hill Australia for the city. Indexed with state or region as applicable.

Broken Hill Block
BT	Australasia
	.Australia
	..Broken Hill Block
RT	South Australia
	New South Wales Australia
	Broken Hill
SN	Structural unit, W New South Wales and E South Australia. Indexed with states as applicable. Added to Thesaurus in 1985.

Broken Hill Mine
RT	base metals
	Cape Province region
	lead-zinc deposits
	metal ores
	mines
	New South Wales Australia
	Northern Cape Province South Africa
	South Africa
	Zambia
SN	Metal ore mine in Broken Hill area, New South Wales. Also base metals mine in Aggeneys, Northern Cape Province, South Africa. Also lead-zinc deposits in Kabwe, Zambia. Before 1993, also search Broken Hill and region and commodity. Indexed with countries a

Broken Ridge
RT	DSDP Site 255
	Indian Ocean
	Iron County Utah
	Leg 121
	Leg 26
	ODP Site 752
	ODP Site 753
	ODP Site 754
	ODP Site 755
	Wah Wah Mountains
SN	SE Indian Ocean. Also ridge in Wah Wah Mountains of Iron County Utah. Search in combination with Indian Ocean or Utah as applicable. Indexed with Indian Ocean or Iron County Utah if applicable. Added to Thesaurus in 1995.

Broken River Formation
BT	Chronostratigraphic Units
	.Phanerozoic
	..Paleozoic
	...Broken River Formation
RT	Silurian
	Devonian
	Queensland Australia
	Australia
SN	Silurian and Devonian. NE Queensland. Indexed with ages as applicable.

Brome County Quebec
BT	Canada
	.Eastern Canada
	..Quebec
	...Brome County Quebec

bromellite
BT	oxides
	.bromellite

Bromide Formation
BT	Chronostratigraphic Units
	.Phanerozoic
	..Paleozoic
	...Ordovician
	....Middle Ordovician
	.....Bromide Formation
RT	Oklahoma
	Simpson Group
SN	In Simpson Group. Added to Thesaurus in 1985.

bromide ion
BT	halogens
	.bromine
	..bromide ion
RT	ions
	bromides
SN	Before 1978, search bromide. Added to Thesaurus in 1993.

bromides
BT	halides
	.bromides
RT	bromide ion
SN	Before 1981, also search bromide.

bromine
BT	halogens
	.bromine
NT	bromide ion
UF	Br
RT	brines
	bromine deposits
	salt
SN	Chemical element. Use bromine deposits for bromine as a commodity.

bromine deposits
RT	brines
	bromine
	salt
SN	Commodity. See List C.

bromlite
USE	alstonite

Bronson Hill Anticlinorium
BT	United States
	.Bronson Hill Anticlinorium
RT	Massachusetts
	New Hampshire
SN	In S New Hampshire and N central Massachusetts. Indexed with states as applicable.

Bronx County New York
BT	United States
	.New York
	..Bronx County New York

Bronze Age
BT	Chronostratigraphic Units
	.Phanerozoic
	..Cenozoic
	...Bronze Age
RT	Holocene
	archaeology
	Quaternary
SN	Archaeological classification. Added to Thesaurus in 1985.

bronzite
USE	enstatite

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

Brooke County West Virginia
BT	United States
	.West Virginia
	..Brooke County West Virginia

Brookings County South Dakota
BT	United States
	.South Dakota
	..Brookings County South Dakota

brookite
BT	oxides
	.brookite
RT	anatase
	rutile
	titanium oxides

Brooks County Georgia
BT	United States
	.Georgia
	..Brooks County Georgia

Brooks County Texas
BT	United States
	.Texas
	..Brooks County Texas

Brooks Range
BT	United States
	.Alaska
	..Northern Alaska
	...Brooks Range
NT	De Long Mountains
	Endicott Mountains
	Sadlerochit Mountains
SN	Between Yukon River and Arctic Ocean in N central Alaska. At one time, was considered part of Rocky Mountains.

Broom Formation
BT	Chronostratigraphic Units
	.Phanerozoic
	..Mesozoic
	...Jurassic
	....Middle Jurassic
	.....Bajocian
	......Broom Formation
RT	Aalenian
	Brent Group
	North Sea
SN	At the base of the Brent Group. North Sea region. Added to Thesaurus in 1995.

Broome County New York
BT	United States
	.New York
	..Broome County New York
NT	Binghamton New York
SN	S New York.

Brothers fault zone
BT	United States
	.Oregon
	..Brothers fault zone
RT	Cascade Range
SN	Cascade Range, central Oregon. Indexed with counties as applicable. Added to Thesaurus in 1985.

Broward County Florida
BT	United States
	.Florida
	..Broward County Florida
RT	Biscayne Aquifer
SN	On the Atlantic Ocean in S Florida.

brown algae
USE	Phaeophyta

brown coal
SN	As of 1981, no longer a valid term for GeoRef. Use lignite.

Brown County Illinois
BT	United States
	.Illinois
	..Brown County Illinois
NT	Versailles Illinois
SN	W Illinois.

Brown County Indiana
BT	Indiana
	.Brown County Indiana
SN	S central Indiana.

Brown County Kansas
BT	United States
	.Kansas
	..Brown County Kansas
SN	NE Kansas.

Brown County Minnesota
BT	United States
	.Minnesota
	..Brown County Minnesota
NT	New Ulm Minnesota
SN	S Minnesota.

Brown County Nebraska
BT	United States
	.Nebraska
	..Brown County Nebraska

Brown County Ohio
BT	United States
	.Ohio
	..Brown County Ohio

Brown County South Dakota
BT	United States
	.South Dakota
	..Brown County South Dakota

Brown County Texas
BT	United States
	.Texas
	..Brown County Texas

Brown County Wisconsin
BT	United States
	.Wisconsin
	..Brown County Wisconsin
NT	Green Bay Wisconsin
SN	E Wisconsin.

Brown forest soils
BT	soils
	.Brown forest soils
RT	soil group
	Intrazonal soils

brown mica
USE	phlogopite

Brown soils
BT	soils
	.Brown soils
RT	soil group
	Zonal soils

Browns Park Formation
BT	Chronostratigraphic Units
	.Phanerozoic
	..Cenozoic
	...Neogene
	....Browns Park Formation
RT	Pliocene
	Miocene
	Utah
	Wyoming
	Colorado
SN	Miocene? NE Utah, NW Colorado and S Wyoming. Added to Thesaurus in 1985.

Browse Basin
RT	Indian Ocean
	Timor Sea
	Western Australia
SN	Continental shelf off N Western Australia. Indexed with land or ocean regions as applicable. Added to Thesaurus in 1985.

Bruce County Ontario
BT	Canada
	.Eastern Canada
	..Ontario
	...Bruce County Ontario

Bruce Peninsula
BT	Canada
	.Eastern Canada
	..Ontario
	...Bruce Peninsula
UF	Saugeen Peninsula
RT	Niagara Escarpment
SN	Peninsula of SE Ontario, Canada. Extends N between Lake Huron and Georgian Bay. Added to Thesaurus in 1981.

brucite
BT	oxides
	.brucite

brucite marble
BT	metamorphic rocks
	.marbles
	..brucite marble

Bruderheim Meteorite
BT	meteorites
	.stony meteorites
	..chondrites
	...L chondrites
	....Bruderheim Meteorite
RT	Alberta
SN	Olivine-hypersthene chondrite named for village NE of Edmonton in central Alberta.

Bruederheim
SN	Not a valid term for GeoRef. See Bruderheim Meteorite.

Brule County South Dakota
BT	United States
	.South Dakota
	..Brule County South Dakota

Brule Formation
BT	Chronostratigraphic Units
	.Phanerozoic
	..Cenozoic
	...Paleogene
	....Oligocene
	.....Brule Formation
RT	Wyoming
	Colorado
	Nebraska
	South Dakota
	White River Group
	lower Oligocene
	middle Oligocene
SN	In White River Group. Lower and middle Oligocene. Previously considered lower Oligocene. In NE Colorado, W Nebraska, W South Dakota, and E Wyoming. Indexed with lower Oligocene and/or middle Oligocene as applicable.

Brunei
BT	Malay Archipelago
	.Borneo
	..Brunei
RT	ASEAN
	East Malaysia
SN	Sultanate formerly under British protection which gained independence and joined the Commonwealth in 1984. Found in NE part of Borneo. This term has multiple hierarchies.

Brunhes Chron
BT	Chronostratigraphic Units
	.Phanerozoic
	..Cenozoic
	...Quaternary
	....upper Quaternary
	.....Brunhes Chron
UF	Brunhes Epoch
	Brunhes Normal
RT	paleomagnetism
	reversals
SN	Geochronologic division based on magnetostratigraphic normal polarity unit. Extends to the present. Formerly designated the Brunhes Epoch. Added to Thesaurus in 1998.

Brunhes Epoch
USE	Brunhes Chron

Brunhes Normal
USE	Brunhes Chron

Brunswick
SN	No longer a valid term for GeoRef. As of 1993, see Brunswick Germany for the city in Lower Saxony, Germany. As of 1989, for the city in Georgia, use Brunswick Georgia.

Brunswick County North Carolina
BT	United States
	.North Carolina
	..Brunswick County North Carolina

Brunswick County Virginia
BT	United States
	.Virginia
	..Brunswick County Virginia
SN	S Virginia.

Brunswick Formation
BT	Chronostratigraphic Units
	.Phanerozoic
	..Mesozoic
	...Brunswick Formation
RT	Upper Triassic
	Lower Jurassic
	Pennsylvania
	New Jersey
	Newark Supergroup
	Passaic Formation
SN	In Newark Supergroup. New Jersey and SE Pennsylvania. Indexed with ages as applicable. Added to Thesaurus in 1989.

Brunswick Georgia
BT	United States
	.Georgia
	..Glynn County Georgia
	...Brunswick Georgia
SN	City in SE Georgia.

Brunswick Germany
BT	Europe
	.Central Europe
	..Germany
	...Lower Saxony Germany
	....Brunswick Germany
UF	Braunschweig Germany
SN	City in Lower Saxony, Germany.

brushite
BT	phosphates
	.brushite

Brushy Basin Shale Member
BT	Chronostratigraphic Units
	.Phanerozoic
	..Mesozoic
	...Jurassic
	....Upper Jurassic
	.....Brushy Basin Shale Member
RT	New Mexico
	Utah
	Colorado
	Arizona
	Morrison Formation
SN	Member of Morrison Formation. SE Utah, NE Arizona, SW Colorado and NW New Mexico. Added to Thesaurus in 1985.

Brushy Canyon Formation
BT	Chronostratigraphic Units
	.Phanerozoic
	..Paleozoic
	...Permian
	....Guadalupian
	.....Brushy Canyon Formation
RT	New Mexico
	Delaware Mountain Group
	Delaware Basin
	Permian Basin
SN	In the Delaware Mountain Group, Delaware Basin, W Texas and New Mexico. Not to be confused with the Upper Jurassic Brushy Canyon Member, Mariposa Formation of California.

Brussels Belgium
BT	Europe
	.Western Europe
	..Belgium
	...Brabant Belgium
	....Brussels Belgium
UF	Bruxelles Belgium
SN	City in central Belgium.

Bruxelles Belgium
USE	Brussels Belgium

Bryan County Georgia
BT	United States
	.Georgia
	..Bryan County Georgia
SN	SE Georgia.

Bryan County Oklahoma
BT	United States
	.Oklahoma
	..Bryan County Oklahoma
SN	S Oklahoma.

Bryansk Russian Federation
BT	Commonwealth of Independent States
	.Russian Federation
	..Bryansk Russian Federation
BT	Europe
	.Bryansk Russian Federation
SN	City and oblast SW of Moscow in W Russian Federation. Before 1993, Bryansk Russian Republic was also used. This term has multiple hierarchies.

Bryophyta
BT	Plantae
	.Bryophyta
NT	Hepaticae
	Musci
RT	thallophytes
	mud mounds

Bryozoa
BT	Invertebrata
	.Bryozoa
NT	Cheilostomata
	Cryptostomata
	Ctenostomata
	Cystoporata
	Trepostomata
UF	Ectoprocta
	Polyzoa
RT	acanthopores
	Cyclostomata
	reef builders
SN	Phylum.

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