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road log
UF	log, road
RT	maps
	guidebook
	field trips

road materials
SN	Not a valid GeoRef index term after 1970. See construction materials; gravel deposits; aggregate; asphalt; cement materials.

Road River Formation
BT	Chronostratigraphic Units
	.Phanerozoic
	..Paleozoic
	...Road River Formation
RT	Ordovician
	Silurian
	Lower Devonian
	Alaska
	British Columbia
	Yukon Territory
	Upper Cambrian
	Northwest Territories
SN	Indexed with ages as applicable. Added to Thesaurus in 1989.

road tests
RT	engineering geology
	highways
	testing
SN	Added to Thesaurus in 1981.

Roadian
BT	Chronostratigraphic Units
	.Phanerozoic
	..Paleozoic
	...Permian
	....Guadalupian
	.....Roadian

Roadless Area Review & Evaluation, Phase II
USE	RARE II regions

roads
SN	Not a valid term for GeoRef. See highways.

Roan Supergroup
BT	Chronostratigraphic Units
	.Precambrian
	..Roan Supergroup
RT	South Carolina
	North Carolina
	Georgia
	Tennessee
SN	Interlayered with Carolina Gneiss in Spruce Pine District. N Georgia, W North Carolina, NW South Carolina, and E Tennessee.

Roane County Tennessee
BT	United States
	.Tennessee
	..Roane County Tennessee
RT	Oak Ridge National Laboratory
SN	E Tennessee.

Roane County West Virginia
BT	United States
	.West Virginia
	..Roane County West Virginia
RT	Granny Creek Field
SN	W West Virginia.

Roanoke County Virginia
BT	United States
	.Virginia
	..Roanoke County Virginia
RT	Roanoke Virginia
SN	SW Virginia. Also search Roanoke Virginia and/or Salem Virginia if applicable.

Roanoke Virginia
BT	United States
	.Virginia
	..Roanoke Virginia
RT	Roanoke County Virginia
SN	City on Roanoke River in but independent of Roanoke County, SW Virginia. Indexed with Roanoke County Virginia for adjacent areas if applicable.

Roaring Brook Valley
RT	Hartford County Connecticut
	New York
	Tolland County Connecticut
SN	Valley in Hartford County and another in Tolland County, Connecticut. Also occurs in the Adirondacks of NE New York and in other locations. Indexed with counties as applicable.

robbery
USE	stream capture

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

Roberts County South Dakota
BT	United States
	.South Dakota
	..Roberts County South Dakota

Roberts County Texas
BT	United States
	.Texas
	..Roberts County Texas

Roberts Mountain Allochthon
USE	Roberts Mountains Allochthon

Roberts Mountains
RT	Eureka County Nevada
SN	Eureka County in central Nevada. Indexed with county or region as applicable.

Roberts Mountains Allochthon
BT	United States
	.Nevada
	..Roberts Mountains Allochthon
UF	Roberts Mountain Allochthon
RT	Elko County Nevada
	Eureka County Nevada
SN	Central Nevada. Indexed with county or counties as applicable. Added to Thesaurus in 1989.

Roberts Mountains Formation
BT	Chronostratigraphic Units
	.Phanerozoic
	..Paleozoic
	...Silurian
	....Middle Silurian
	.....Roberts Mountains Formation
RT	Utah
	Nevada
SN	Underlies Rabbit Hill Formation. E Nevada, and W Utah.

Robertson Bay Group
RT	Antarctica
	Cambrian
	Neoproterozoic
	Ordovician
	Victoria Land
SN	N Victoria Land. Neoproterozoic to Ordovician. Indexed with ages as applicable. Added to Thesaurus in 1989.

Robertson County Kentucky
BT	United States
	.Kentucky
	..Robertson County Kentucky

Robertson County Tennessee
BT	United States
	.Tennessee
	..Robertson County Tennessee

Robertson County Texas
BT	United States
	.Texas
	..Robertson County Texas

Robeson County North Carolina
BT	United States
	.North Carolina
	..Robeson County North Carolina

Robles Formation
BT	Chronostratigraphic Units
	.Phanerozoic
	..Mesozoic
	...Cretaceous
	....Robles Formation
RT	West Indies
	Puerto Rico

Roca Formation
RT	Argentina
	Council Grove Group
	Danian
	K-T boundary
	Kansas
	Maestrichtian
	Nebraska
	Oklahoma
	Wolfcampian
SN	K-T age (Maestrichtian-Danian) or Paleocene of Argentina. Also a Wolfcampian member of the Council Grove Group in NE Kansas, SE Nebraska, and N Oklahoma. Indexed with age or ages as applicable.

Roccamonfina
BT	Europe
	.Southern Europe
	..Italy
	...Campania Italy
	....Roccamonfina
RT	volcanoes
SN	Volcano in NW Campania, S Italy.

Rochechouart France
BT	ute-Vienne France
	.Rochechouart France
RT	impact features
SN	Town in Haute-Vienne, W central France.

Rochester Formation
BT	Chronostratigraphic Units
	.Phanerozoic
	..Paleozoic
	...Silurian
	....Middle Silurian
	.....Rochester Formation
RT	Ontario
	Pennsylvania
	New York
	Maryland
	West Virginia
	Clinton Group
	Keefer Sandstone
SN	Includes Keefer Sandstone Member, Decew Waterlime Bed.

Rochester New York
BT	United States
	.New York
	..Monroe County New York
	...Rochester New York
SN	City on S Lake Ontario in W New York.

rock bursts
UF	bursts, rock
	rockbursts
RT	mining geology
	geologic hazards

rock carvings
USE	petroglyphs

Rock County Minnesota
BT	United States
	.Minnesota
	..Rock County Minnesota

Rock County Nebraska
BT	United States
	.Nebraska
	..Rock County Nebraska

Rock County Wisconsin
BT	United States
	.Wisconsin
	..Rock County Wisconsin

Rock Creek Park
BT	United States
	.Rock Creek Park
RT	District of Columbia
	Montgomery County Maryland
SN	Also search Rock Creek. Indexed with county and/or region as applicable.

rock creep
USE	creep

rock crystal
USE	quartz crystal

rock descriptions
SN	Not a valid GeoRef index term after 1970. See igneous rocks; metamorphic rocks; sedimentary rocks.

Rock Eval
USE	Rock-Eval

rock failure
USE	failures

rock glaciers
BT	glaciers
	.rock glaciers
RT	glacial geology
	permafrost
	gravity flows
	boulders
	frost action
	ice

Rock Island County Illinois
BT	United States
	.Illinois
	..Rock Island County Illinois
NT	Rock Island Illinois
SN	NW Illinois.

Rock Island Illinois
BT	United States
	.Illinois
	..Rock Island County Illinois
	...Rock Island Illinois
SN	City on Mississippi River in NW Illinois.

Rock Lake Shale Member
BT	Chronostratigraphic Units
	.Phanerozoic
	..Paleozoic
	...Carboniferous
	....Pennsylvanian
	.....Upper Pennsylvanian
	......Missourian
	.......Rock Lake Shale Member
RT	Missouri
	Nebraska
	Kansas
	Stanton Formation
SN	Of Stanton Limestone. E Kansas, NW Missouri, and SE Nebraska.

rock masses
RT	rock mechanics
SN	Used in engineering to characterize material which includes a volume of earth (rock, soil, water, and air-filled voids) and its discontinuities.

rock mecha

rock mechanics
RT	acoustical emissions
	asperities
	Atterberg limits
	biaxial tests
	boundary conditions
	brittle materials
	brittleness
	case studies
	cohesive materials
	competent materials
	compressive strength
	congelifraction
	constitutive equations
	cracks
	cryoturbation
	dams
	defo
SN	Used for geotechnical studies.

rock pressure
USE	lithostatic pressure

rock salt
USE	halite

rock slides
USE	rockslides

rock slip
USE	rockslides

Rock Springs Formation
BT	Chronostratigraphic Units
	.Phanerozoic
	..Mesozoic
	...Cretaceous
	....Upper Cretaceous
	.....Rock Springs Formation
RT	Utah
	Wyoming
	Mesaverde Group
	Hilliard Shale
SN	In Mesaverde Group. Includes McCourt Tongue and Glades coal bed. NE Utah and SW Wyoming. Added to Thesaurus in 1989.

Rock Springs Uplift
BT	United States
	.Wyoming
	..Rock Springs Uplift
RT	Rocky Mountains
	Sweetwater County Wyoming
	Rock Springs Wyoming
SN	SW Wyoming. Added to Thesaurus in 1985.

Rock Springs Wyoming
BT	United States
	.Wyoming
	..Sweetwater County Wyoming
	...Rock Springs Wyoming
RT	Rock Springs Uplift
SN	City in SW Wyoming.

rock varn

rock varnish
UF	desert varnish
RT	exposure age
	iron oxides
	weathering
	arid environment
	deserts
	manganese oxides
	weathering crust
	cation-ratio dating
	chemical weathering
SN	Added to Thesaurus in 1995.

Rock-Eval
UF	Rock Eval
RT	chemical analysis
	instruments
	hydrocarbons
	petroleum
	kerogen
	pyrolysis
SN	Pyrolysis. Standard screening method in petroleum geochemistry. As of 1993, for discussion of instruments and analysis. Added to Thesaurus in 1993.

rock-stratigraphy
USE	lithostratigraphy

rock-water interaction
USE	water-rock interaction

rock-water interface
USE	water-rock interaction

Rockall Bank
BT	Atlantic Ocean
	.North Atlantic
	..Rockall Bank
RT	DSDP Site 117
	ODP Site 980
	ODP Site 981
	ODP Site 982
SN	About 225 miles W of the Hebrides.

Rockall Plateau
BT	Atlantic Ocean
	.North Atlantic
	..Rockall Plateau
UF	Rockall Rise
RT	Leg 48
	Leg 12
	DSDP Site 116
	DSDP Site 117
	DSDP Site 403
	DSDP Site 404
	DSDP Site 405
	DSDP Site 406
	DSDP Site 552
	Leg 81
	DSDP Site 553
	DSDP Site 554
	DSDP Site 555
SN	Rise or submarine plateau just N of Rockall Bank W of the Hebrides.

Rockall Rise
USE	Rockall Plateau

Rockall Trench
USE	Rockall Trough

Rockall Trough
BT	Atlantic Ocean
	.North Atlantic
	..Rockall Trough
UF	Rockall Trench
RT	DSDP Site 610
SN	SE of Rockall Bank W of the Hebrides.

Rockbridge County Virginia
BT	United States
	.Virginia
	..Rockbridge County Virginia
SN	W Virginia. Also search Buena Vista Virginia and/or Lexington Virginia if applicable.

rockbridgeite
BT	phosphates
	.rockbridgeite

rockbursts
USE	rock bursts

Rockcastle County Kentucky
BT	United States
	.Kentucky
	..Rockcastle County Kentucky

Rockdale County Georgia
BT	United States
	.Georgia
	..Rockdale County Georgia

rockfalls
BT	mass movements
	.rockfalls
RT	slope stability
	geomorphology

rockfill dams
BT	dams
	.rockfill dams
SN	Added to Thesaurus in 1982.

Rockhampton Australia
BT	Australasia
	.Australia
	..Queensland Australia
	...Rockhampton Australia
SN	City in E Queensland.

Rockingham County New Hampshire
BT	w Hampshire
	.Rockingham County New Hampshire
RT	Great Bay
SN	SE New Hampshire.

Rockingham County North Carolina
BT	United States
	.North Carolina
	..Rockingham County North Carolina
SN	N North Carolina.

Rockingham County Virginia
BT	United States
	.Virginia
	..Rockingham County Virginia
SN	NW Virginia. Also search Harrisonburg Virginia if applicable.

Rockland County New York
BT	United States
	.New York
	..Rockland County New York
SN	SE New York.

Rocknest Formation
RT	Australia
	Northwest Territories
	Paleoproterozoic
	Western Australia
SN	Paleoproterozoic of Northwest Territories. May also occur in Western Australia. Indexed with age as applicable. Added to Thesaurus in 1989.

rocks
RT	aggregate
	bedrock
	cap rocks
	carbonate rocks
	chemically precipitated rocks
	country rocks
	crystalline rocks
	extrusive rocks
	fluid inclusions
	host rocks
	hypabyssal rocks
	inclusions
	metaigneous rocks
	metamorphic rocks
	metaplutonic rocks
	metasedimentary rocks

rocks and ores
SN	Used in subfile G. See metal ores; rocks; igneous rocks; metamorphic rocks; sedimentary rocks; crystalline rocks; mineral resources.

rockslides
BT	mass movements
	.rockslides
UF	rock slides
	rock slip
RT	geomorphology
	landslides

Rockwall County Texas
BT	United States
	.Texas
	..Rockwall County Texas

Rockwood Formation
BT	Chronostratigraphic Units
	.Phanerozoic
	..Paleozoic
	...Silurian
	....Rockwood Formation
RT	Georgia
	Tennessee
SN	Lower and Middle Silurian. Underlies Hancock Limestone; overlies Sequatchie Formation. E Tennessee and NW Georgia.

Rocky Flats Plant
BT	United States
	.Colorado
	..Rocky Flats Plant
RT	Boulder County Colorado
	nuclear facilities
	Jefferson County Colorado
	Superfund
SN	Environmental technology site. Formerly a plutonium processing site. Chiefly in Jefferson County, between Boulder and Golden, north-central Colorado. Indexed with Jefferson County Colorado and/or Boulder County Colorado as applicable. Added to Thesaurus i

Rocky Mountain Arsenal
BT	United States
	.Colorado
	..Adams County Colorado
	...Rocky Mountain Arsenal
SN	NE central Colorado. Added to Thesaurus in 1985.

Rocky Mountain foreland
USE	Rocky Mountains foreland

Rocky Mountain National Park
BT	United States
	.Colorado
	..Rocky Mountain National Park
RT	national parks
	Grand County Colorado
	Boulder County Colorado
	Front Range
	Larimer County Colorado
SN	N Colorado, in Boulder, Grand and Larimer counties. Indexed with counties as applicable. Added to Thesaurus in 1989.

Rocky Mountain Trench
BT	North America
	.Rocky Mountain Trench
RT	Montana
	British Columbia
	Yukon Territory
	Rocky Mountains
	Northern Rocky Mountains
SN	A trough in the Northern Rockies, E of the interior plateau of British Columbia, between a series of parallel ranges extending WNW from Montana to the headwaters of the Yukon River. Indexed with British Columbia, Washington, and/or Yukon Territory as appl

Rocky Mountains
BT	North America
	.Rocky Mountains
NT	Canadian Rocky Mountains
	Central Rocky Mountains
	Northern Rocky Mountains
	Selkirk Mountains
	Southern Rocky Mountains
	U. S. Rocky Mountains
RT	Canada
	Alaska
	North American Cordillera
	Canadian Cordillera
	Disturbed Belt
	Cariboo Mountains
	Colorado Lineament
	Laramide Orogeny
	Franklin Mountains
	Madison Range
	Mackenzie Mountains
	Rocky Mountain Trench
	Rock Springs Uplift
	Rocky Mountains foreland
	Semino
SN	Mountain system in W North America extending from N Alaska to the Mexican frontier. Indexed with Alaska, and countries as applicable.

Rocky Mountains foreland
BT	North America
	.Rocky Mountains foreland
UF	Rocky Mountain foreland
RT	Rocky Mountains
SN	Added to Thesaurus in 1981.

Rocroi France
BT	Europe
	.Western Europe
	..France
	...Ardennes France
	....Rocroi France
UF	Rocroy France
RT	Ardennes
SN	Town in N France.

Rocroy France
USE	Rocroi France

Rodentia
BT	Chordata
	.Vertebrata
	..Tetrapoda
	...Mammalia
	....Theria
	.....Eutheria
	......Rodentia
NT	Castoridae
	Caviomorpha
	Hystricomorpha
	Myomorpha
	Sciuromorpha
SN	Order.

Rodessa Formation
BT	Chronostratigraphic Units
	.Phanerozoic
	..Mesozoic
	...Cretaceous
	....Lower Cretaceous
	.....Rodessa Formation
BT	Chronostratigraphic Units
	.Phanerozoic
	..Mesozoic
	...Cretaceous
	....Comanchean
	.....Rodessa Formation
RT	Louisiana
	Mississippi
	Texas
	Trinity Group
	Arkansas
SN	In Trinity Group. This term has multiple hierarchies. Added to Thesaurus in 1989.

Rodez Pass
USE	Rodez Trough

Rodez Trough
BT	Europe
	.Western Europe
	..France
	...Rodez Trough
UF	Rodez Pass
RT	Aveyron France
	Haute-Garonne France
	Tarn France
SN	Between Segala Plateau in S and Causse du Comtal in N. Also search Rodez. Indexed with departments as applicable.

rodingite
BT	igneous rocks
	.plutonic rocks
	..gabbros
	...rodingite

Rodinia
BT	Chronostratigraphic Units
	.Precambrian
	..Proterozoic
	...Neoproterozoic
	....Rodinia
RT	plate tectonics
	supercontinents
SN	Supercontinent assembled during the Grenvillian Orogeny. Indexed with countries and continents as applicable.

Rodna Mountains
BT	Europe
	.Southern Europe
	..Romania
	...Transylvania
	....Rodna Mountains
UF	Rodnei Mountains
RT	Carpathians
	Transylvanian Alps
SN	Range of the Carpathians along border between Maramures and Cluj Counties in N Transylvania.

Rodna Romania
BT	Europe
	.Southern Europe
	..Romania
	...Transylvania
	....Rodna Romania
SN	Village in NE Cluj County in NE Transylvania.

Rodnei Mountains
USE	Rodna Mountains

Rodrigues Island
USE	Rodriguez Island

Rodrigues triple junction
USE	Rodriguez triple junction

Rodriguez Island
BT	Indian Ocean Islands
	.Mascarene Islands
	..Rodriguez Island
UF	Rodrigues Island
SN	A dependency of Mauritius in the Mascarene Islands about 500 miles E of Madagascar.

Rodriguez triple junction
BT	Indian Ocean
	.Rodriguez triple junction
UF	Rodrigues triple junction
RT	Southwest Indian Ridge
	Southeast Indian Ridge
	Central Indian Ridge
	triple junctions
SN	Spreading center near 70#DGE 25#DG30'S in the south-central Indian Ocean. Junction of the Central Indian Ridge, Southeast Indian Ridge, and Southwest Indian Ridge. Indexed with Southeast Indian Ridge, Southwest Indian Ridge, and/or Central Indian Ridge as

roedderite
BT	silicates
	.ring silicates
	..roedderite
RT	meteorites
SN	Meteorite mineral.

roemerite
BT	sulfates
	.roemerite

Roermond earthquake 1992
BT	earthquakes
	.Roermond earthquake 1992
RT	Netherlands
	Limburg
	Limburg Netherlands
SN	Epicenter in Limburg, SW Netherlands.

roestone
USE	oolite

Rogaland Norway
BT	Europe
	.Western Europe
	..Scandinavia
	...Norway
	....Rogaland Norway
NT	Sandnes Norway
	Sogndal Norway
	Stavanger Norway
SN	County in SW Norway.

Roger Mills County Oklahoma
BT	United States
	.Oklahoma
	..Roger Mills County Oklahoma

Rogers County Oklahoma
BT	United States
	.Oklahoma
	..Rogers County Oklahoma

roggianite
BT	silicates
	.orthosilicates
	..sorosilicates
	...roggianite

Rogue River
BT	United States
	.Oregon
	..Rogue River
SN	SW Oregon. Also search Rogue.

Rokko Mountains
BT	ogo Japan
	.Rokko Mountains
SN	NE of Kobe in Hyogo Prefecture, central Honshu.

Rolette County North Dakota
BT	United States
	.North Dakota
	..Rolette County North Dakota

roll orebodies
USE	roll-type deposits

roll-type deposits
UF	ore rolls
	roll orebodies
RT	mineral deposits, genesis
	uranium ores

Roma Italy
USE	Rome Italy

Romagna
BT	Europe
	.Southern Europe
	..Italy
	...Emilia-Romagna Italy
	....Romagna
SN	Historical region in N central Italy on the Adriatic Sea.

Romanche Deep
USE	Romanche Trench

Romanche fracture zone
BT	Atlantic Ocean
	.Romanche fracture zone
RT	North Atlantic
	South Atlantic
	Mid-Atlantic Ridge
	Equatorial Atlantic
SN	Cuts across the Mid-Atlantic Ridge between the bulge of South America and Liberia. Indexed with Mid-Atlantic Ridge and/or ocean areas as applicable.

Romanche Gap
USE	Romanche Trench

Romanche Trench
BT	Atlantic Ocean
	.Romanche Trench
UF	Romanche Deep
	Romanche Gap
RT	North Atlantic
	South Atlantic
	Mid-Atlantic Ridge
	Equatorial Atlantic
SN	Extends in a NW-SE direction to the SW of the Romanche fracture zone between bulge of South America and Liberia. Indexed with Mid-Atlantic Ridge and/or ocean areas as applicable.

Romania
BT	Europe
	.Southern Europe
	..Romania
NT	Altin-Tepe
	Apuseni Mountains
	Arad Romania
	Arges River
	Babadag Lake basin
	Bacau Romania
	Bicaz Valley
	Bistrita Mountains
	Bistrita Valley
	Bucegi Mountains
	Constanta Romania
	Dacian Basin
	Delinesti Romania
	Fagaras Mountains
	Getic Nappe
	Gutii Mountains
	Haghimas Syncline
	Iacobeni Romania
	Jiu River valley
	Mehadia Romania
	Mehedinti Plateau
	Moldava Valley
	Moldavian Platform
	Moldova Noua Romania
	Olt River
	Olt River valley
	Paring Mountains
	Piatra-Neamt Romania
	Rarau Massif
	Resita Romania
	Romanian Dobruja
	Romanian Pannonian Basin
	Romanian Plain
	Rusca Montana Romania
	Sasca-Montana Romania
	Semenic Mountains
	Severin
	Suceava Romania
	Sulina Romania
	Svinita Romania
	Teleajen Valley
	Transylvania
	Transylvanian Alps
	Trotus Valley
	Tulcea Romania
	Vrancea
	Walachia
	Zarand Basin
UF	Roumania
	Rumania
RT	Balkan Peninsula
	Banat
	Carpathians
	Black Sea region
	Bukovina
	Carpathian Foredeep
	Carpathian Foreland
	Da

Romania Plain
USE	Romanian Plain

Romanian
BT	Chronostratigraphic Units
	.Phanerozoic
	..Cenozoic
	...Neogene
	....Pliocene
	.....upper Pliocene
	......Romanian
SN	Provincial series, Europe.

Romanian Dobruja
BT	Europe
	.Southern Europe
	..Romania
	...Romanian Dobruja
BT	Europe
	.Southern Europe
	..Dobruja Basin
	...Romanian Dobruja
UF	Dobrogea
RT	Altin-Tepe
	Babadag Lake basin
	Constanta Romania
	Mangalia Romania
	Sulina Romania
	Tulcea Romania
SN	Region on the Black Sea. Before 1981, search Dobruja AND Romania. This term has multiple hierarchies. Added to Thesaurus in 1982.

Romanian Pannonian Basin
BT	Europe
	.Pannonian Basin
	..Romanian Pannonian Basin
BT	Europe
	.Southern Europe
	..Romania
	...Romanian Pannonian Basin
SN	This term has multiple hierarchies. Added to Thesaurus in 1982.

Romanian Plain
BT	Europe
	.Southern Europe
	..Romania
	...Romanian Plain
UF	Romania Plain
RT	Moldavia
	Walachia
	Siret River
SN	Area between the Transylvanian Alps on the N, and the Danube River on the S and E. Indexed with regions as applicable.

Romashkino Field
BT	Commonwealth of Independent States
	.Russian Federation
	..Orenburg Russian Federation
	...Romashkino Field
RT	oil and gas fields
SN	Orenburg Oblast in Southern Urals. Before 1978, also search Romashkino; Romashkino oil field. This term has multiple hierarchies.

Rome Formation
BT	Chronostratigraphic Units
	.Phanerozoic
	..Paleozoic
	...Cambrian
	....Lower Cambrian
	.....Rome Formation
RT	Virginia
	Alabama
	North Carolina
	Georgia
	Tennessee
	Chilhowee Group
SN	Named for exposures south of Rome, Georgia.

Rome Italy
BT	Europe
	.Southern Europe
	..Italy
	...Latium Italy
	....Rome Italy
UF	Roma Italy
SN	Province including the city on the Tiber River.

Rome Trough
RT	Appalachian Basin
	Georgia
	Kentucky
	Southern Appalachians
	Tennessee
	United States
	West Virginia
SN	S Appalachians from Georgia to West Virginia. Indexed with states or region as applicable. Added to Thesaurus in 1985.

Ronda Massif
USE	Serrania de Ronda

Ronda Sierra
USE	Serrania de Ronda

Ronda, Serrania de
USE	Serrania de Ronda

Rondonia Brazil
BT	South America
	.Brazil
	..Rondonia Brazil
UF	Guapore Brazil
SN	State in W Brazil on Bolivian border.

Rondout Formation
BT	Chronostratigraphic Units
	.Phanerozoic
	..Paleozoic
	...Rondout Formation
RT	Lower Devonian
	Pennsylvania
	New York
	Upper Silurian
SN	Upper Silurian and Lower Devonian. New York and Pennsylvania. Includes Fuyk Sandstone Member. Indexed with ages as applicable.

ronian
NT	Gowganda Formation
	Onaping Formation
	Signal Hill Formation

Ronne Ice Shelf
BT	Antarctica
	.Ronne Ice Shelf
RT	Weddell Sea
	Filchner Ice Shelf
SN	Adjacent to Weddell Sea and Filchner Ice Shelf. Added to Thesaurus in 1989.

roof control
RT	mines
	mining geology
	underground mining
SN	Added to Thesaurus in 1985.

Rooks County Kansas
BT	United States
	.Kansas
	..Rooks County Kansas
SN	NW central Kansas.

Roorkee India
BT	Asia
	.Indian Peninsula
	..India
	...Uttar Pradesh India
	....Roorkee India
UF	Rurki India
SN	Town in N Uttar Pradesh.

Roosevelt County Montana
BT	United States
	.Montana
	..Roosevelt County Montana
SN	NE Montana.

Roosevelt County New Mexico
BT	United States
	.New Mexico
	..Roosevelt County New Mexico
SN	E New Mexico.

Roosevelt Hot Springs
USE	Roosevelt Hot Springs KGRA

Roosevelt Hot Springs KGRA
BT	United States
	.Utah
	..Beaver County Utah
	...Roosevelt Hot Springs KGRA
UF	KGRA, Roosevelt Hot Springs
	Roosevelt Hot Springs
RT	geothermal fields
SN	Known Geothermal Resources Area. SW Utah, in Beaver County. Added to Thesaurus in 1981.

root casts
USE	rhizoliths

root clay
USE	underclay

Root River
RT	Fillmore County Minnesota
	Houston County Minnesota
	Mackenzie District Northwest Territories
	Minnesota
	Northwest Territories
	Racine County Wisconsin
	Waukesha County Wisconsin
	Wisconsin
SN	River in Fillmore and Houston counties, extreme SE Minnesota. Also in Waukesha and Racine counties, extreme SE Wisconsin. Also in SW Mackenzie District, Northwest Territories. Indexed with states and counties; or province as applicable. Added to Thesaurus

roots
RT	flowers
	fossil wood
	fossils
	paleobotany
	Plantae
	rhizoliths
	vegetation
	wood
SN	Added to Thesaurus in 1985.

roquesite
BT	sulfides
	.roquesite

Roraima Brazil
BT	South America
	.Brazil
	..Roraima Brazil
SN	State in N Brazil.

Roraima Formation
RT	Brazil
	Guyana
	South America
	Venezuela
SN	Tentatively dated from Paleoproterozoic to as young as Miocene. In the Pacaraima Mountains. Indexed with age or ages as applicable.

Ros River valley
BT	Europe
	.Ukraine
	..Ros River valley
SN	W central Ukraine. Also search Ros; Ros River. This term has multiple hierarchies.

Rosario Formation
BT	Chronostratigraphic Units
	.Phanerozoic
	..Mesozoic
	...Cretaceous
	....Upper Cretaceous
	.....Rosario Formation
RT	Campanian
	Mexico
	Baja California
	Maestrichtian
	Point Loma Formation

Roscommon County Michigan
BT	United States
	.Michigan
	..Michigan Lower Peninsula
	...Roscommon County Michigan
SN	N central Michigan.

ROSE
USE	Rivera Ocean Seismic Experiment

Rose Canyon Formation
BT	Chronostratigraphic Units
	.Phanerozoic
	..Cenozoic
	...Paleogene
	....Eocene
	.....Rose Canyon Formation
RT	California
SN	Lower and middle Eocene. Overlies Torrey Sand; underlies Poway Conglomerate. S California. Type section in San Diego County.

Rose Hill Formation
BT	Chronostratigraphic Units
	.Phanerozoic
	..Paleozoic
	...Silurian
	....Middle Silurian
	.....Rose Hill Formation
RT	Virginia
	Pennsylvania
	Maryland
	Clinton Group
SN	In Clinton Group. Maryland, Pennsylvania and N Virginia. Added to Thesaurus in 1985.

Rose Run Sandstone
BT	Chronostratigraphic Units
	.Phanerozoic
	..Paleozoic
	...lower Paleozoic
	....Rose Run Sandstone
RT	Lower Ordovician
	Kentucky
	Ohio
	West Virginia
	Upper Cambrian
	Beekmantown Group
	Knox Group
SN	In Knox Group or Beekmantown Group. Upper Cambrian to Lower Ordovician. S Ohio, N Kentucky, and West Virginia. Indexed with age as applicable. Added to Thesaurus in 1995.

Roseau County Minnesota
BT	United States
	.Minnesota
	..Roseau County Minnesota

Rosebery Australia
BT	Australasia
	.Australia
	..Tasmania Australia
	...Rosebery Australia
SN	Village in W Tasmania.

Rosebud County Montana
BT	United States
	.Montana
	..Rosebud County Montana
SN	E central Montana.

Rosetown Saskatchewan
BT	Canada
	.Western Canada
	..Saskatchewan
	...Rosetown Saskatchewan
SN	Town in SW Saskatchewan.

Rosia Romania
BT	Europe
	.Southern Europe
	..Romania
	...Transylvania
	....Bihor Romania
	.....Rosia Romania
SN	Village 25 miles SE of Oradea in Bihor County in W Transylvania.

Rosidae
BT	Plantae
	.Spermatophyta
	..Angiospermae
	...Dicotyledoneae
	....Rosidae

Ross Barrier
USE	Ross Ice Shelf

Ross County Ohio
BT	United States
	.Ohio
	..Ross County Ohio

Ross Dependency
BT	Antarctica
	.Ross Dependency
RT	Beacon Supergroup
	Beacon Valley
	Buckley Formation
	Beardmore Glacier
	Coalsack Bluff
	Fremouw Formation
	LEW 88516
	Lewis Cliff Meteorites
	Wright Valley
SN	Section lying S of 60#DG S and between 160#DG E and 150#DG W extending to the South Pole. Placed under jurisdiction of New Zealand in 1923 by act of British Parliament. Also search Ross and Antarctica.

Ross Formation
RT	Antarctica
	Devonian
	Lower Devonian
	Middle Devonian
	Mississippi
	New Zealand
	Tasmania Australia
	Tennessee
	Triassic
SN	Lower Devonian and Middle Devonian. W Tennessee and Mississippi. Also cited in Antarctica, Tasmania (Ross Sandstone, Triassic), and New Zealand. Indexed with ages and locations as applicable. Added to Thesaurus in 1993.

Ross Ice Shelf
BT	Antarctica
	.Ross Ice Shelf
UF	Ross Barrier
RT	Beacon Supergroup
	Queen Maud Range
	Beardmore Glacier
	Coalsack Bluff
	Fremouw Formation
	LEW 88516
	Lewis Cliff Meteorites
	Ross Sea
	Ross Island
	McMurdo Ice Shelf
	Shackleton Glacier
SN	Covers S part of Ross Sea between Marie Byrd Land and Victoria Land with its S end at the foot of Queen Maud Range on the edge of the Antarctic continent. Also search Ross and Antarctica.

Ross Island
BT	Antarctica
	.Ross Island
RT	Ross Ice Shelf
	Mount Erebus
	Hut Point Peninsula
SN	In Ross Sea at W end of Ross Ice Shelf separated from Victoria Land by McMurdo Sound. Also search Ross and Antarctica.

Ross Orogeny
RT	Antarctica
	Cambrian
	Neoproterozoic
	Ordovician
	orogeny
	Pan-African Orogeny
	Queen Maud Land
	tectonics
	Victoria Land
SN	?Cambrian-Ordovician. May have begun in the Neoproterozoic. In Transantarctic Mountains, S Victoria Land and Queen Maud Land, Antarctica. Indexed with ages as applicable. Added to Thesaurus in 1995.

Ross Sea
BT	Antarctic Ocean
	.Ross Sea
RT	Pacific Ocean
	Leg 28
	Ross Ice Shelf
	DSDP Site 270
	DSDP Site 271
	DSDP Site 272
	DSDP Site 273
	DSDP Site 274
	Terra Nova Bay
	Victoria Land Basin
SN	Arm of S Pacific Ocean just N of Ross Ice Shelf between Victoria Land and Edward VII Peninsula. Also search Ross and Antarctic Ocean.

Ross-shire Scotland
BT	ghland region Scotland
	.Ross-shire Scotland
SN	A separate county until the 17th century but became part of Ross and Cromarty County in N Scotland. In 1974, became part of Highland region.

Rosses Granite
BT	Europe
	.Western Europe
	..Ireland
	...Donegal Ireland
	....Rosses Granite
SN	In Rosses ring complex.

Rossland British Columbia
BT	Canada
	.Western Canada
	..British Columbia
	...Rossland British Columbia
SN	City in SE British Columbia.

Rostock Bezirk
SN	No longer a valid term for GeoRef. District in N East Germany. See Mecklenburg-Western Pomerania Germany.

Rostov Russian Federation
BT	Commonwealth of Independent States
	.Russian Federation
	..Rostov Russian Federation
BT	Europe
	.Rostov Russian Federation
NT	Azov Russian Federation
	Rostov-na-Donu Russian Federation
SN	Oblast in Black Sea region, Russian Federation. Before 1993, Rostov Russian Republic was also used. This term has multiple hierarchies.

Rostov-na-Donu Russian Federation
BT	Commonwealth of Independent States
	.Russian Federation
	..Rostov Russian Federation
	...Rostov-na-Donu Russian Federation
RT	Don River
SN	City in Rostov (oblast). Before 1993, Rostov-na-Donu Russian Republic was also used. This term has multiple hierarchies.

Rostroconchia
BT	Invertebrata
	.Mollusca
	..Rostroconchia

Rotalia
BT	Invertebrata
	.Protista
	..Foraminifera
	...Rotaliina
	....Rotaliacea
	.....Rotalia
RT	microfossils
SN	Genus. Indexed with microfossils if applicable.

Rotaliacea
BT	Invertebrata
	.Protista
	..Foraminifera
	...Rotaliina
	....Rotaliacea
NT	Ammonia
	Elphidium
	Heterostegina
	Miogypsinidae
	Nummulitidae
	Rotalia
RT	microfossils
SN	Indexed with microfossils if applicable.

Rotaliina
BT	Invertebrata
	.Protista
	..Foraminifera
	...Rotaliina
NT	Buliminacea
	Carterinacea
	Cassidulinacea
	Discorbacea
	Globigerinacea
	Lagenidae
	Nodosariacea
	Orbitoidacea
	Robertinacea
	Rotaliacea
	Spirillinacea
RT	microfossils
SN	Indexed with microfossils if applicable.

Rotalipora
BT	Invertebrata
	.Protista
	..Foraminifera
	...Rotaliina
	....Globigerinacea
	.....Rotalipora
RT	microfossils
SN	Genus. Indexed with microfossils if applicable.

rotation
RT	Earth
	length of day
	motions
	plate rotation
	torque
SN	See plate rotation.

rotational wave
USE	S-waves

Rotliegendes
BT	Chronostratigraphic Units
	.Phanerozoic
	..Paleozoic
	...Permian
	....Rotliegendes
RT	Lower Permian
	Autunian
	Middle Permian
	Leman Sandstone Formation
	Saxonian
SN	Europe. Below Zechstein.

Rotterdam Netherlands
BT	Europe
	.Western Europe
	..Netherlands
	...Rotterdam Netherlands
SN	South Holland Province, SW Netherlands.

Rottleberode Germany
BT	Europe
	.Central Europe
	..Germany
	...Saxony-Anhalt Germany
	....Rottleberode Germany
SN	Village in Saxony-Anhalt, E Germany.

Rouen France
BT	Europe
	.Western Europe
	..France
	...Seine-Maritime France
	....Rouen France
SN	City on the Seine River in S Seine-Maritime, N France.

Rouergue
BT	Europe
	.Western Europe
	..France
	...Rouergue
RT	Aveyron France
	Tarn-et-Garonne France
SN	Ancient province. Primarily in Aveyron Department in S central France. Indexed with departments as applicable.

Rough Creek fault zone
BT	United States
	.Kentucky
	..Rough Creek fault zone
SN	W Kentucky.

roughness
RT	hydraulics
	permeability
	reservoir rocks

Roumania
USE	Romania

Round Mountain
RT	Nye County Nevada
SN	Location of gold deposits in Nye County, S central Nevada. Also in numerous other locations. Indexed with state or region as applicable.

rounding
RT	particles
	pebbles
	roundness
	sand
	sedimentary rocks
	sorting

roundness
RT	particles
	rounding
	sediments
	shape analysis
	sphericity

Roussillon
BT	Europe
	.Western Europe
	..France
	...Roussillon
RT	Pyrenees-Orientales France
SN	Region and former province roughly coextensive with Pyrenees-Orientales Department on the Spanish border.

Routt County Colorado
BT	United States
	.Colorado
	..Routt County Colorado
RT	Yampa River
	Steamboat Springs
SN	NW Colorado.

Rouville County Quebec
BT	Canada
	.Eastern Canada
	..Quebec
	...Rouville County Quebec

Rouyn Quebec
BT	Canada
	.Eastern Canada
	..Quebec
	...Temiscamingue County Quebec
	....Rouyn Quebec
SN	Mining city in SW Quebec near N Ontario border.

Rowan County Kentucky
BT	United States
	.Kentucky
	..Rowan County Kentucky
SN	NE Kentucky.

Rowan County North Carolina
BT	United States
	.North Carolina
	..Rowan County North Carolina
SN	W central North Carolina.

Rowne
SN	Not a valid term for GeoRef. Use Zloty Stok Poland if applicable.

Roxana Silt
BT	Chronostratigraphic Units
	.Phanerozoic
	..Cenozoic
	...Quarternary
	....Pleistocene
	.....Roxana Silt
RT	Kentucky
	Illinois
SN	SW Illinois and W Kentucky. Added to Thesaurus in 1989.

Roxbury Conglomerate
RT	Boston Bay Group
	Lower Cambrian
	Massachusetts
	Neoproterozoic
SN	In Boston Bay Group. E Massachusetts. Previously thought to be Devonian or Carboniferous in age. Includes Brookline, Squantum and Dorchester members. Indexed with ages as applicable. Added to Thesaurus in 1989.

Roy Group
BT	Chronostratigraphic Units
	.Precambrian
	..Archean
	...Roy Group
RT	Quebec
SN	Added to Thesaurus in 1989.

Royal Creek
BT	Canada
	.Western Canada
	..Yukon Territory
	...Royal Creek

Rozdol Ukraine
BT	Europe
	.Ukraine
	..Rozdol Ukraine
RT	Lvov Ukraine
SN	Town in Lvov Oblast in E Ukraine. This term has multiple hierarchies. Indexed with oblast as applicable.

rozenite
BT	sulfates
	.rozenite

Roztocze
BT	Europe
	.Roztocze
UF	Tomaszow-Lvov Ridge
RT	Poland
	Ukraine
	Lvov Ukraine
SN	Mountain range. Indexed with Poland and/or Ukraine as applicable.

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