Lak  search
Lake Agassiz  search
BTChronostratigraphic Units
 .Phanerozoic
 ..Cenozoic
 ...Quarternary
 ....Pleistocene
 .....Lake Agassiz
RTNorth Dakota
 North America
 Minnesota
 Manitoba
SNGlacial lake which existed in Pleistocene Epoch. Covered parts of N central U.S. and S central Canada. Indexed with Manitoba and U.S. states as applicable.
Lake Albert  search
BTAfrica
 .East African Lakes
 ..Lake Albert
UFLake Mobutu
RTCongo Democratic Republic
 Uganda
 East African Rift
 Upper Zaire Congo Democratic Republic
SNIndexed with Uganda and/or Congo Democratic Republic as applicable.
Lake Algonquin  search
BTChronostratigraphic Units
 .Phanerozoic
 ..Cenozoic
 ...Quarternary
 ....Pleistocene
 .....Lake Algonquin
RTOntario
 Wisconsin
 North America
 Minnesota
 Michigan
 Lake Superior region
SNPleistocene glacial lake. Occupied sites of modern lakes Superior, Michigan and Huron, and adjacent land areas. Indexed with Ontario and U.S. states as applicable. Added to Thesaurus in 1985.
Lake Athabasca  search
BTCanada
 .Western Canada
 ..Lake Athabasca
RTAlberta
 Saskatchewan
 Athabasca District
SNNW Saskatchewan and NE Alberta. Indexed with provinces as applicable. Added to Thesaurus in 1985.
Lake Baikal  search
BTCommonwealth of Independent States
 .Russian Federation
 ..Lake Baikal
BTAsia
 .Lake Baikal
UFBaikal (Lake)
RTIrkutsk Russian Federation
 Buryat Russian Federation
 Baikal region
 Baikal rift zone
SNLargest freshwater lake in Eurasia. Bounded on N, E, and S by the Buryatia, and on the W by Irkutsk Oblast. Also search Baikal AND lake or lakes. This term has multiple hierarchies.
Lake Balaton  search
BTszprem Hungary
 .Lake Balaton
UFBalaton (Lake)
RTBalaton region
SNW Hungary.
Lake Balkhash  search
BTCommonwealth of Independent States
 .Kazakhstan
 ..Lake Balkhash
UFBalkhash (Lake)
RTBalkhash region
SNE Kazakhstan. This term has multiple hierarchies.
Lake Baringo  search
BTAfrica
 .East African Lakes
 ..Lake Baringo
UFBaringo Lake
RTGreat Rift Valley
 Kenya
 Kenya Rift valley
SNW central Kenya, in Great Rift Valley. Added to Thesaurus in 1981.
lake biscuits  search
USEalgal biscuits
Lake Biwa  search
BTnshu
 .Shiga Japan
 ..Lake Biwa
UFBiwa Lake
 Omi (Lake)
SNW central Honshu. Also search Biwa.
Lake Bonneville  search
RTGreat Salt Lake
 Holocene
 Idaho
 Nevada
 United States
 Upper Pleistocene
 Utah
SNLarge prehistoric body of water in present Great Salt Lake area. Indexed with states and age or ages as applicable.
Lake Bonney  search
RTSouth Australia
 Taylor Valley
 Victoria Land
SNLake in SE South Australia. Also in Taylor Valley of Victoria Land, Antarctica. Indexed with location as applicable.
Lake Bouchet  search
USELac du Bouchet
Lake Chad  search
BTAfrica
 .West Africa
 ..Lake Chad
RTCameroon
 Nigeria
 Niger
 Chad Basin
 Chad
SNIndexed with countries as applicable.
Lake Champlain  search
BTNorth America
 .Lake Champlain
RTQuebec
 Vermont
 New York
 Champlain Sea
 Champlain Valley
SNBetween New York and Vermont extending into Quebec. Indexed with Quebec and states as applicable.
Lake Char Fault  search
BTUnited States
 .Lake Char Fault
RTMassachusetts
 Connecticut
 Rhode Island
SNSE New England. Indexed with states as applicable. Added to Thesaurus in 1985.
Lake Chatuge  search
BTUnited States
 .Lake Chatuge
RTNorth Carolina
 Georgia
 Clay County North Carolina
 Towns County Georgia
SNIndexed with counties as applicable.
Lake Chicago  search
BTChronostratigraphic Units
 .Phanerozoic
 ..Cenozoic
 ...Quarternary
 ....Pleistocene
 .....Lake Chicago
RTUnited States
 Illinois
 Indiana
 Wisconsin
 Michigan
 Great Lakes region
SNPleistocene glacial lake in the Great Lakes region. Indexed with states as applicable. Added to Thesaurus in 1989.
Lake Como (Italy)  search
USEComo
Lake Constance  search
BTEurope
 .Central Europe
 ..Lake Constance
UFBodensee
 Constance Lake
RTSwitzerland
 Bavaria Germany
 Baden-Wurttemberg Germany
 Rhine River
 Rhine Basin
 Vorarlberg Austria
SNIndexed with countries as applicable.
Lake County California  search
BTUnited States
 .California
 ..Lake County California
RTClear Lake
SNNW California.
Lake County Colorado  search
BTUnited States
 .Colorado
 ..Lake County Colorado
NTClimax Colorado
 Leadville Colorado
 Leadville mining district
 Saint Kevin Gulch
RTClimax Mine
SNCentral Colorado.
Lake County Florida  search
BTUnited States
 .Florida
 ..Lake County Florida
SNBounded by Saint Johns River in central Florida.
Lake County Illinois  search
BTUnited States
 .Illinois
 ..Lake County Illinois
SNBounded by Lake Michigan in extreme NE Illinois.
Lake County Indiana  search
BTIndiana
 .Lake County Indiana
SNExtreme NW Indiana.
Lake County Michigan  search
BTUnited States
 .Michigan
 ..Michigan Lower Peninsula
 ...Lake County Michigan
SNW Michigan.
Lake County Minnesota  search
BTUnited States
 .Minnesota
 ..Lake County Minnesota
NTTwo Harbors Minnesota
RTVermilion Range
SNNE Minnesota.
Lake County Montana  search
BTUnited States
 .Montana
 ..Lake County Montana
RTFlathead Lake
SNNW Montana.
Lake County Ohio  search
BTUnited States
 .Ohio
 ..Lake County Ohio
SNNE Ohio.
Lake County Oregon  search
BTUnited States
 .Oregon
 ..Lake County Oregon
SNS Oregon.
Lake County South Dakota  search
BTUnited States
 .South Dakota
 ..Lake County South Dakota
SNE South Dakota.
Lake County Tennessee  search
BTUnited States
 .Tennessee
 ..Lake County Tennessee
RTReelfoot Lake
SNExtreme NW Tennessee.
Lake District  search
UFEnglish Lake District
RTCumbria England
 Cumberland England
 Worcestershire England
 Westmorland England
SNMountain and lake region in Cumbria, NW England. Until 1975, parts were included in Lancashire, Cumberland, and Westmorland counties. Indexed with England and counties as applicable.
Lake Edward  search
BTAfrica
 .East African Lakes
 ..Lake Edward
RTCongo Democratic Republic
 Uganda
 East African Rift
SNS of Lake Albert. Indexed with countries as applicable.
Lake Erie  search
BTNorth America
 .Great Lakes
 ..Lake Erie
RTOntario
 Ohio
 Pennsylvania
 New York
 Michigan
 Detroit River
SNIndexed with Ontario and states as applicable.
Lake Eyre  search
BTAustralasia
 .Australia
 ..South Australia
 ...Lake Eyre
SNNE South Australia.
Lake Frome  search
BTAustralasia
 .Australia
 ..South Australia
 ...Lake Frome
SNE South Australia. Added to Thesaurus in 1989.
Lake Geneva  search
BTEurope
 .Lake Geneva
UFLake Leman
 Leman Lake
RTHaute-Savoie France
 Valais Switzerland
 Geneva Switzerland
 Vaud Switzerland
 Rhone River
 Rhone Valley
SNIndexed with countries as applicable.
Lake George  search
RTEssex County New York
 New York
 Washington County New York
 Warren County New York
SNNE New York. Indexed with counties or regions as applicable.
Lake Gosiute  search
BTChronostratigraphic Units
 .Phanerozoic
 ..Cenozoic
 ...Paleogene
 ....Eocene
 .....Lake Gosiute
RTGreen River Formation
 Sweetwater County Wyoming
SNEocene lake in SW Wyoming. Added to Thesaurus in 1981.
Lake Huron  search
BTNorth America
 .Great Lakes
 ..Lake Huron
RTOntario
 Michigan
 Georgian Bay
 Manitoulin Island
SNIndexed with Michigan and/or Ontario.
Lake Iroquois  search
BTChronostratigraphic Units
 .Phanerozoic
 ..Cenozoic
 ...Quarternary
 ....Pleistocene
 .....Upper Pleistocene
 ......Lake Iroquois
RTCanada
 Ontario
 United States
 New York
 Great Lakes region
 Lake Ontario
SNGlacial lake which existed in the Lake Ontario basin and adjacent area. Indexed with Lake Ontario and/or Ontario and U.S. states as applicable.
Lake Jocassee  search
BTUnited States
 .South Carolina
 ..Lake Jocassee
RTOconee County South Carolina
 Pickens County South Carolina
SNReservoir on Keowee River, NW South Carolina, near Seneca. Indexed with counties as applicable. Added to Thesaurus in 1981.
Lake Kariba  search
BTAfrica
 .East African Lakes
 ..Lake Kariba
UFKariba Lake
RTZambezi Valley
 Zimbabwe
 Zambia
SNFormed by dam in Kariba Gorge of Zambezi River. Indexed with countries as applicable.
Lake Kinneret  search
USESea of Galilee
Lake Kivu  search
BTAfrica
 .Central Africa
 ..Lake Kivu
BTAfrica
 .East African Lakes
 ..Lake Kivu
RTCongo Democratic Republic
 East African Rift
 Rwanda
 Kivu Congo Democratic Republic
SNThis term has multiple hierarchies. Indexed with countries as applicable.
Lake La Ronge  search
USELac La Ronge
Lake Ladoga  search
BTCommonwealth of Independent States
 .Russian Federation
 ..Lake Ladoga
BTEurope
 .Lake Ladoga
SNE and NE of Saint Petersburg. This term has multiple hierarchies.
Lake Ladoga region  search
BTEurope
 .Lake Ladoga region
RTRussian Federation
 Finland
 Baltic Shield
 Karelia Russian Federation
 Eastern Finland Province
 Karelia
SNRegion surrounding Lake Ladoga, extending into Finland. Indexed with countries as applicable. Added to Thesaurus in 1981.
Lake Lahontan  search
BTChronostratigraphic Units
 .Phanerozoic
 ..Cenozoic
 ...Quarternary
 ....Pleistocene
 .....Lake Lahontan
RTUnited States
 California
 Nevada
 Oregon
SNExtinct lake. Occupied parts of NW Nevada, NE California and SE Oregon during Pleistocene time. Indexed with states as applicable. Added to Thesaurus in 1985.
Lake Lappajarvi  search
BTEurope
 .Western Europe
 ..Scandinavia
 ...Finland
 ....Western Finland Province
 .....Lake Lappajarvi
RTimpact features
SNSW central Finland.
Lake Leman  search
USELake Geneva
Lake Louise  search
RTAlberta
 Banff National Park
SNVillage and small lake in Banff National Park in SW Alberta. As of 1993, use Lake Louise Alberta for the village. Also in other locations. Indexed with province or regions as applicable.
Lake Magadi  search
BTAfrica
 .East African Lakes
 ..Lake Magadi
BTAfrica
 .East Africa
 ..Kenya
 ...Lake Magadi
RTEast African Rift
SNSoda lake in S central Kenya. This term has multiple hierarchies.
Lake Malawi  search
BTAfrica
 .East Africa
 ..Lake Malawi
BTAfrica
 .East African Lakes
 ..Lake Malawi
UFLake Nyasa
RTEast African Rift
 Malawi
 Mozambique
 Tanzania
SNThis term has multiple hierarchies. Indexed with countries as applicable.
Lake Maracaibo  search
BTSouth America
 .Venezuela
 ..Lake Maracaibo
RTZulia Venezuela
 Maracaibo Basin
 Trujillo Venezuela
SNLake in NW Venezuela.
Lake Matagami  search
USEMatagami
Lake Maumee  search
BTChronostratigraphic Units
 .Phanerozoic
 ..Cenozoic
 ...Quarternary
 ....Pleistocene
 .....Lake Maumee
RTOntario
 Indiana
 Ohio
 North America
 Michigan
 Great Lakes region
SNPleistocene glacial lake in Ontario, Ohio, Michigan and Indiana. Indexed with states or provinces as applicable. Added to Thesaurus in 1989.
Lake Mead  search
RTArizona
 Clark County Nevada
 Lake Mead Fault
 Lost City
 Mohave County Arizona
 Nevada
 United States
SNWithin Lake Mead National Recreation Area. Indexed with states and counties as applicable.
Lake Mead Fault  search
BTUnited States
 .Nevada
 ..Lake Mead Fault
RTLake Mead
SNS Nevada. Added to Thesaurus in 1989.
Lake Mendota  search
BTUnited States
 .Wisconsin
 ..Dane County Wisconsin
 ...Lake Mendota
RTMadison Wisconsin
SNIn Dane County, S central Wisconsin.
Lake Michigan  search
BTNorth America
 .Great Lakes
 ..Lake Michigan
RTUnited States
 Illinois
 Indiana
 Wisconsin
 Michigan
 Green Bay
 Wedron Formation
SNIndexed with states as applicable.
Lake Michigan Basin  search
USEMichigan Basin
Lake Michigan Lobe  search
RTCanada
 Great Lakes region
 Illinois
 Indiana
 Laurentide ice sheet
 Michigan
 United States
 Wisconsin
SNPart of Laurentide ice sheet, Wisconsinan glaciation.
Lake Missoula  search
BTChronostratigraphic Units
 .Phanerozoic
 ..Cenozoic
 ...Quarternary
 ....Pleistocene
 .....Lake Missoula
RTUnited States
 Idaho
 Montana
 Washington
 Oregon
 Channeled Scabland
SNPleistocene glacial lake in NW United States. Indexed with states as applicable. Added to Thesaurus in 1985.
Lake Mobutu  search
USELake Albert
Lake Natron  search
BTAfrica
 .East Africa
 ..Lake Natron
BTAfrica
 .East African Lakes
 ..Lake Natron
RTEast African Rift
 Kenya
 Tanzania
SNThis term has multiple hierarchies. Indexed with countries as applicable.
Lake Neusiedler  search
BTEurope
 .Central Europe
 ..Lake Neusiedler
UFFerto to
 Neusiedler Lake
 Neusiedlersee
RTAustria
 Hungary
 Burgenland Austria
SNE Austria and NW Hungary. Indexed with countries as applicable. Added to Thesaurus in 1985.
Lake Nipissing  search
BTCanada
 .Eastern Canada
 ..Ontario
 ...Nipissing District Ontario
 ....Lake Nipissing
RTCallander Bay
SNNipissing District, SE Ontario. Added to Thesaurus in 1989.
Lake Nyasa  search
USELake Malawi
Lake Nyos  search
BTAfrica
 .West Africa
 ..Cameroon
 ...Lake Nyos
UFNyos
SNVolcanic crater lake in NW Cameroon. Site of carbon dioxide outgassing natural disasters. Added to Thesaurus in 1993.
Lake of Bienne  search
USEBiel Lake
Lake of Laach  search
USELaacher See
Lake of the Woods  search
BTNorth America
 .Lake of the Woods
RTOntario
 Minnesota
 Manitoba
 Lake of the Woods region
SNNW Ontario, SE Manitoba and N Minnesota. Indexed with provinces and/or Minnesota and counties as applicable. Added to Thesaurus in 1989.
Lake of the Woods County Minnesota  search
BTUnited States
 .Minnesota
 ..Lake of the Woods County Minnesota
Lake of the Woods region  search
BTNorth America
 .Lake of the Woods region
RTOntario
 Minnesota
 Manitoba
 Lake of the Woods
SNN Minnesota, SW Ontario and SE Manitoba. Indexed with Minnesota and counties and/or Canadian provinces as applicable. Added to Thesaurus in 1985.
Lake of Zurich  search
BTEurope
 .Central Europe
 ..Switzerland
 ...Lake of Zurich
RTZurich Switzerland
SNN Switzerland.
Lake Okeechobee  search
BTUnited States
 .Florida
 ..Lake Okeechobee
SNS central Florida.
Lake Onega  search
BTCommonwealth of Independent States
 .Russian Federation
 ..Lake Onega
BTEurope
 .Lake Onega
RTKarelia Russian Federation
 Karelia
 Onega Russian Federation
SNIn Karelia Autonomous Republic. This term has multiple hierarchies.
Lake Ontario  search
BTNorth America
 .Great Lakes
 ..Lake Ontario
RTOntario
 New York
 Lake Iroquois
SNIndexed with New York and/or Ontario as applicable.
Lake Pontchartrain  search
BTUnited States
 .Louisiana
 ..Lake Pontchartrain
SNS Louisiana. Indexed with parishes as applicable.
Lake Powell  search
BTUnited States
 .Lake Powell
RTUtah
 Arizona
 Coconino County Arizona
 Garfield County Utah
 San Juan County Utah
 Glen Canyon Dam
 Kane County Utah
SNArtificial lake in S Utah and N Arizona, in Glen Canyon National Recreation Area. Indexed with states and counties as applicable.
Lake Rudolf  search
USELake Turkana
Lake Rudolph  search
USELake Turkana
Lake Saint Clair  search
RTDetroit River
 Great Lakes region
 Macomb County Michigan
 Michigan
 Michigan Lower Peninsula
 North America
 Ontario
 Saint Clair County Michigan
 Thames River
 Wayne County Michigan
SNSE Michigan and SW Ontario. Indexed with North America or Michigan and U.S. counties or and/or Ontario as applicable. Added to Thesaurus in 1989.
lake sediments  search
UFlacustrine sediments
RTglacial geology
 sediments
 fluviolacustrine environment
 lacustrine environment
 geochemical surveys
 mineral exploration
 lakes
 glaciolacustrine environment
 glaciolacustrine sedimentation
SNBefore 1998, used chiefly for economic studies. Also search (lacustrine environment OR fluviolacustrine environment OR glaciolacustrine environment) AND sediments. Before 1981, also search sediments AND lakes. Added to Thesaurus in 1981.
Lake Sevan  search
BTEurope
 .Armenia
 ..Lake Sevan
RTRazdan River
 Sevan Armenia
SNN Armenia. This term has multiple hierarchies.
Lake Superior  search
BTNorth America
 .Great Lakes
 ..Lake Superior
RTOntario
 Wisconsin
 Minnesota
 Michigan
 Batchawana Bay
 Lake Superior region
 Keweenaw Peninsula
 Thunder Bay
SNIndexed with Ontario and states as applicable.
Lake Superior Basin  search
USELake Superior region
Lake Superior region  search
BTNorth America
 .Lake Superior region
UFLake Superior Basin
RTOntario
 Wisconsin
 Minnesota
 Michigan
 Lake Superior
 Great Lakes region
 Lake Algonquin
 Southern Province
SNTerm reintroduced in 1985. Also search Lake Superior. Not a valid term from 1972-1984. Indexed with Lake Superior, Ontario and states as applicable. Added to Thesaurus in 1985.
Lake Suwa  search
BTnshu
 .Nagano Japan
 ..Lake Suwa
SNW central Honshu.
Lake Tahoe  search
BTUnited States
 .Lake Tahoe
RTCalifornia
 Nevada
 Douglas County Nevada
 El Dorado County California
 Placer County California
 Washoe County Nevada
SNE California and W Nevada. Indexed with states and counties as applicable.
Lake Tanganyika  search
BTAfrica
 .East African Lakes
 ..Lake Tanganyika
RTCongo Democratic Republic
 Zambia
 Burundi
 East African Rift
 Tanzania
SNIndexed with countries as applicable.
Lake Taupo  search
BTAustralasia
 .New Zealand
 ..Lake Taupo
RTNorth Island
SNCentral North Island, New Zealand. Also index North Island. Added to Thesaurus in 1989.
Lake Temiscamingue  search
USELake Timiskaming
Lake Temiskaming  search
USELake Timiskaming
Lake Tiberias  search
USESea of Galilee
Lake Timiskaming  search
BTCanada
 .Eastern Canada
 ..Lake Timiskaming
UFLake Temiscamingue
 Lake Temiskaming
 Temiscamingue Lake
 Temiskaming Lake
 Timiskaming Lake
RTOntario
 Quebec
 Timiskaming District Ontario
 Temiscamingue County Quebec
SNIn SW Quebec and E central Ontario. Before 1985, also search Timiskaming. Indexed with provinces as applicable. Added to Thesaurus in 1981.
Lake Titicaca  search
BTSouth America
 .Lake Titicaca
RTAltiplano
 La Paz Bolivia
 Puno Peru
SNIndexed with countries as applicable.
Lake Torrens  search
BTAustralasia
 .Australia
 ..South Australia
 ...Lake Torrens
SNE central South Australia.
Lake Turkana  search
BTAfrica
 .East Africa
 ..Lake Turkana
BTAfrica
 .East African Lakes
 ..Lake Turkana
UFLake Rudolf
 Lake Rudolph
 Rudolf (Lake)
RTEthiopia
 Sudan
 East African Rift
 Kenya
 Turkana Basin
SNNew name for Lake Rudolf. Primarily in Kenya. This term has multiple hierarchies. Indexed with countries as applicable.
Lake Uinta  search
BTChronostratigraphic Units
 .Phanerozoic
 ..Cenozoic
 ...Paleogene
 ....Eocene
 .....Lake Uinta
RTUnited States
 Utah
 Wyoming
 Colorado
SNExtinct lake. Occupied parts of W Colorado, SW Wyoming and E Utah during Eocene time. Indexed with states as applicable. Added to Thesaurus in 1985.
Lake Valley Formation  search
BTChronostratigraphic Units
 .Phanerozoic
 ..Paleozoic
 ...Carboniferous
 ....Mississippian
 .....Lower Mississippian
 ......Lake Valley Formation
RTNew Mexico
SNIncludes Alamogordo, Arcente, Dona Ana, and Nunn members.
Lake Vanda  search
BTAntarctica
 .Victoria Land
 ..Lake Vanda
SNSaline lake in dry-valleys region of S Victoria Land, near McMurdo Sound. Added to Thesaurus in 1981.
Lake Victoria  search
BTAfrica
 .East Africa
 ..Lake Victoria
BTAfrica
 .East African Lakes
 ..Lake Victoria
RTUganda
 Kenya
 Tanzania
SNThis term has multiple hierarchies. Indexed with countries as applicable.
Lake Washington  search
RTKing County Washington
 Minnesota
 Washington
SNNW Washington, near Seattle; Meeker County, S central Minnesota, and elsewhere. Indexed with states and counties as applicable. Added to Thesaurus in 1989.
Lake Winnipeg  search
BTCanada
 .Western Canada
 ..Manitoba
 ...Lake Winnipeg
SNS central Manitoba.
lake-level changes  search
RTlacustrine environment
 lakes
 levels
 paleogeography
 regression
 shorelines
 stratigraphy
 transgression
SNAlso search (lacustrine environment OR lacustrine sedimentation) AND (changes of level OR levels). Added to Thesaurus in 1998.
lakes  search
NTcrater lakes
 ephemeral lakes
 glacial lakes
 meromictic lakes
RTdrainage
 ecology
 eutrophication
 extinct lakes
 geomorphology
 glacial features
 glaciolacustrine environment
 hydrogen sulfide
 hydrology
 hydrosphere
 lacustrine environment
 lacustrine features
 lagoons
 lake sediments
 lake-level changes
 lava lakes
 limnology
 pale
SNUsed for the geomorphologic feature. As of 1981, use lacustrine environment for type of environment. Before 1972, was sometimes used in combination with extinct (i.e. lakes, extinct). Now use extinct lakes. Also index lacustrine features as applicable.
Lakota Formation  search
BTChronostratigraphic Units
 .Phanerozoic
 ..Mesozoic
 ...Cretaceous
 ....Lower Cretaceous
 .....Lakota Formation
RTWyoming
 Montana
 Nebraska
 South Dakota
 Inyan Kara Group
SNIn Inyan Kara Group. Montana, W South Dakota, NE Nebraska and E Wyoming. Added to Thesaurus in 1985.
Lakshmi Planum  search
BTVenus
 .Ishtar Terra
 ..Lakshmi Planum
SNHigh plateau region, W Ishtar Terra. Before 1993, also search Lakshmi Plateau AND Venus. Added to Thesaurus in 1993.