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Thesaurus

Black

Black Creek Formation
BT	Chronostratigraphic Units
	.Phanerozoic
	..Mesozoic
	...Cretaceous
	....Upper Cretaceous
	.....Black Creek Formation
RT	South Carolina
	North Carolina
SN	E South Carolina and W North Carolina. Added to Thesaurus in 1989.

Black earth
USE	Chernozems

Black Forest
BT	Europe
	.Central Europe
	..Black Forest
UF	Schwarzwald
RT	Switzerland
	Baden-Wurttemberg Germany
SN	Mountainous region in W Baden-Wurttemberg extending into NW Switzerland. Indexed with country and state or canton as applicable.

Black Hawk County Iowa
BT	United States
	.Iowa
	..Black Hawk County Iowa

Black Hills
RT	Crook County Wyoming
	Custer County South Dakota
	Fall River County South Dakota
	Lawrence County South Dakota
	Meade County South Dakota
	Niobrara County Wyoming
	Pennington County South Dakota
	South Dakota
	United States
	Weston County Wyoming
	Wyoming
SN	Group of mountains primarily in SW South Dakota. May be in other locations. Search in combination with state or region. Indexed with states and counties as applicable.

black lead
USE	graphite

Black Mesa
RT	Apache County Arizona
	Arizona
	Coconino County Arizona
	Navajo County Arizona
SN	Tableland region in NE Arizona. Also occurs in other locations. Search in combination with state or region. Indexed with counties or regions as applicable.

Black Mesa Basin
RT	Arizona
	Coconino County Arizona
	Navajo County Arizona
SN	In NE Arizona. Search in combination with state or region. Indexed with counties or regions as applicable.

Black Mountain
RT	Arizona
	Australia
	California
	South Africa
	Wales
SN	Occurs in various locations. Indexed with appropriate regions or states and U.S. counties as applicable. Added to Thesaurus in 1989.

Black Mountains
RT	Arizona
	Beaver County Utah
	Black Range
	California
	Clark County Nevada
	England
	Inyo County California
	Iron County Utah
	Mohave County Arizona
	Nevada
	Utah
	Wales
SN	Occur in numerous locations including: part of the Amargosa Range, Death Valley area, E California and S Nevada; Mohave County, NW Arizona and Clark County, S Nevada; Beaver and Iron counties, SW Utah; and in SE Wales and SW England. Indexed with states a

Black Range
RT	Black Mountains
	Grant County New Mexico
	New Mexico
	Sierra County New Mexico
SN	Extends N-S through parts of Grant and Sierra counties in SW New Mexico. Indexed with counties or state and mountain ranges as applicable.

Black River Group
BT	Chronostratigraphic Units
	.Phanerozoic
	..Paleozoic
	...Ordovician
	....Middle Ordovician
	.....Black River Group
RT	Pennsylvania
	New York
	Blackriverian
SN	Comprises Pamelia, Lowville, and Chaumont formations.

Black River-Matheson Program
USE	BRIM

Black Rock
RT	Bahamas
	Black Rock Desert
	North Atlantic
	Utah
SN	W central Utah. Also search Black Rock Desert and Utah for location in Utah. As of 1993, use Black Rock Utah for the town if applicable. Also a marine feature in the Bahamas. Indexed with states or regions as applicable. Added to Thesaurus in 1981.

Black Rock Desert
RT	Black Rock
	Humboldt County Nevada
	Millard County Utah
	Nevada
	Pershing County Nevada
SN	In Pershing and Humboldt counties in NW Nevada. Also a location in Millard County Utah. Search in combination with state or region. Indexed with counties or states as applicable.

Black Sea
BT	Mediterranean Sea
	.East Mediterranean
	..Black Sea
RT	Azov Sea
	Bosporus
	DSDP Site 379
	DSDP Site 380
	DSDP Site 381
	Eurasia
	Leg 42B
SN	Large inland sea bounded on the N and NE by the Central Asian republics, the Russian Federation, and Ukraine; S by Turkey, and W by Bulgaria and Romania.

Black Sea Basin
USE	Black Sea region

Black Sea Coast
USE	Black Sea region

Black Sea Lowland
USE	Black Sea region

Black Sea region
UF	Black Sea Basin
	Black Sea Coast
	Black Sea Lowland
RT	Turkey
	Romania
	Ukraine
	Bulgaria
	Eurasia
	Cimmerian Orogeny
	Dobruja Basin
	Moldova
SN	Indexed with Europe and/or Asia; and/or countries as applicable.

black shale
BT	sedimentary rocks
	.clastic rocks
	..black shale
UF	biopelite
	bituminous shale
	carbonaceous shale
RT	terrigenous materials
	shale
	carbonaceous composition

black smokers
BT	hydrothermal vents
	.black smokers
RT	bottom features
	ocean floors
	sulfides
	mid-ocean ridges
	hydrothermal conditions
	fumaroles
	volcanic features
SN	Added to Thesaurus in 1993.

Black Warrior Basin
BT	United States
	.Black Warrior Basin
RT	Mississippi
	Alabama
	Mary Lee Coal
	Warrior coal field
SN	Primarily in Alabama. Indexed with states as applicable.

Blackbird District
USE	Blackbird mining district

Blackbird mining district
BT	United States
	.Idaho
	..Lemhi County Idaho
	...Blackbird mining district
UF	Blackbird District
RT	mines
	copper ores
	cobalt ores
SN	E central Idaho. Added to Thesaurus in 1993.

Blackford County Indiana
BT	Indiana
	.Blackford County Indiana
SN	E Indiana.

Blackhawk Formation
BT	Chronostratigraphic Units
	.Phanerozoic
	..Mesozoic
	...Cretaceous
	....Upper Cretaceous
	.....Blackhawk Formation
RT	Utah
	Mesaverde Group
SN	In Mesaverde Group. Six principal members are Desert, Grassy, Sunnyside, Kenilworth, Aberdeen, and Spring Canyon. Central E Utah.

Blackleaf Formation
BT	Chronostratigraphic Units
	.Phanerozoic
	..Mesozoic
	...Cretaceous
	....Lower Cretaceous
	.....Blackleaf Formation
RT	Montana
	Colorado Group
	Sweetgrass Arch
SN	Lower Cretaceous. NW and central Montana. In Colorado Group. Members ascending are Flood Member, Taft Hill Member, Vaughn Member, and Bootlegger Member. Underlies Marias River Shale; overlies Kootenay Formation. Added to Thesaurus in 1993.

Blackriverian
BT	Chronostratigraphic Units
	.Phanerozoic
	..Paleozoic
	...Ordovician
	....Middle Ordovician
	.....Blackriverian
RT	Black River Group
SN	North America. Lower Mohawkian, below Trentonian.

Blacksburg Virginia
BT	United States
	.Virginia
	..Montgomery County Virginia
	...Blacksburg Virginia
SN	Town in SW Virginia.

Blackstone Series
BT	Chronostratigraphic Units
	.Precambrian
	..Proterozoic
	...Neoproterozoic
	....Blackstone Series
RT	Massachusetts
	Rhode Island
SN	SE Massachusetts and N Rhode Island. Added to Thesaurus in 1989.

Blackwater Draw Formation
BT	Chronostratigraphic Units
	.Phanerozoic
	..Cenozoic
	...Quaternary
	....Blackwater Draw Formation
RT	Pleistocene
	Holocene
	New Mexico
	Texas
SN	Pleistocene or Holocene. In Texas and New Mexico. Indexed with age as applicable. Added to Thesaurus in 1995.

Blackwater River
RT	Florida
	Missouri
	West Virginia
SN	Several locations including NW Florida and W Missouri. Indexed with county or region as applicable.