mi  search
Miami County Indiana  search
BTIndiana
 .Miami County Indiana
Miami County Kansas  search
BTUnited States
 .Kansas
 ..Miami County Kansas
Miami County Ohio  search
BTUnited States
 .Ohio
 ..Miami County Ohio
Miami Florida  search
BTUnited States
 .Florida
 ..Dade County Florida
 ...Miami Florida
SNCity in SE Florida.
Miami Limestone  search
BTChronostratigraphic Units
 .Phanerozoic
 ..Cenozoic
 ...Quarternary
 ....Pleistocene
 .....Miami Limestone
RTFlorida
SNMiami Oolite, Pleistocene. It is a soft white oolitic limestone, containing streaks of thin irregular layers of calcite separating less crystalline streaks. In S Florida.
Mianwali Pakistan  search
BTAsia
 .Indian Peninsula
 ..Pakistan
 ...Punjab Pakistan
 ....Mianwali Pakistan
SNTown and district in NW Punjab Province, NE Pakistan.
Miaoli Taiwan  search
BTAsia
 .Far East
 ..Taiwan
 ...Miaoli Taiwan
SNTown in NW Taiwan.
miargyrite  search
BTsulfosalts
 .sulfantimonites
 ..miargyrite
miaskite  search
BTigneous rocks
 .plutonic rocks
 ..syenites
 ...miaskite
mica  search
SNAs of 1981, no longer a valid term for GeoRef. See mica group. Use mica deposits for mica as a commodity.
mica deposits  search
RTglauconite deposits
 insulation materials
 mica group
 Plotina Deposit
 vermiculite deposits
mica group  search
BTsilicates
 .sheet silicates
 ..mica group
NTannite
 biotite
 celadonite
 clintonite
 fluor-phlogopite
 glauconite
 lepidolite
 lepidomelane
 listvenite
 margarite
 muscovite
 paragonite
 phengite
 phlogopite
 polylithionite
 sericite
 zinnwaldite
RThydrobiotite
 hydromica
 hydromuscovite
 vermiculite
 mica deposits
Michelle For  search
Michelle Formation  search
BTChronostratigraphic Units
 .Phanerozoic
 ..Paleozoic
 ...Devonian
 ....Middle Devonian
 .....Michelle Formation
RTCanada
 Yukon Territory
 Northwest Territories
SNComposed of black calcareous shale and aphanitic silty limestone. In W Northwest Territories and Yukon Territory.
michenerite  search
BTbismuthides
 .michenerite
Michigamme Formation  search
BTChronostratigraphic Units
 .Precambrian
 ..Proterozoic
 ...Paleoproterozoic
 ....Michigamme Formation
RTOntario
 Wisconsin
 Michigan
 Baraga Group
SNIn Baraga Group. Ontario, NW Michigan, NE Wisconsin. Added to Thesaurus in 1993.
Michigan  search
BTUnited States
 .Michigan
NTMichigan Lower Peninsula
 Michigan Upper Peninsula
RTCanadian Shield
 Animikie Group
 Antrim Shale
 Baraga Group
 Bass Islands Dolomite
 Berea Sandstone
 Charlevoix
 Clinton Group
 Copper Harbor Conglomerate
 Detroit River
 Detroit River Group
 Dundee Limestone
 Eau Claire Formation
 Freda Sandstone
 Glenwood Shale
 Grand
Michigan Basin  search
BTNorth America
 .Michigan Basin
UFLake Michigan Basin
RTOntario
 Illinois
 Indiana
 Ohio
 Wisconsin
 Michigan Lower Peninsula
 Michigan Upper Peninsula
 Michigan
 Bass Islands Dolomite
SNTerm revised in 1989. Structural basin with its center in the Michigan Lower Peninsula. Located in NE Illinois, N Indiana, Michigan, NW Ohio, E Wisconsin and W Ontario. Indexed with states and province as applicable.
Michigan Lower Peninsula  search
BTUnited States
 .Michigan
 ..Michigan Lower Peninsula
NTAlcona County Michigan
 Allegan County Michigan
 Alpena County Michigan
 Antrim County Michigan
 Arenac County Michigan
 Barry County Michigan
 Bay County Michigan
 Benzie County Michigan
 Berrien County Michigan
 Branch County Michigan
 Calhoun County Michigan
 Cass County Michigan
 Charlevoix County Michigan
 Cheboygan County Michigan
 Clare County Michigan
 Clinton County Michigan
 Crawford County Michigan
 Eaton County Michigan
 Emmet County Michigan
 Genesee County Michigan
 Gladwin County Michigan
 Grand Traverse County Michigan
 Gratiot County Michigan
 Hillsdale County Michigan
 Huron County Michigan
 Ingham County Michigan
 Ionia County Michigan
 Iosco County Michigan
 Isabella County Michigan
 Jackson County Michigan
 Kalamazoo County Michigan
 Kalkaska County Michigan
 Kent County Michigan
 Lake County Michigan
 Lansing Michigan
 Lapeer County Michigan
 Leelanau County Michigan
 Lenawee County Michigan
 Livingston County Michigan
 Macomb County Michigan
 Manistee County Michigan
 Mason County Michigan
 Mecosta County Michigan
 Midland County Michigan
 Missaukee County Michigan
 Monroe County Michigan
 Montcalm County Michigan
 Montmorency County Michigan
 Muskegon County Michigan
 Newaygo County Michigan
 Oakland County Michigan
 Oceana County Michigan
 Ogemaw County Michigan
 Osceola County Michigan
 Oscoda County Michigan
 Otsego County Michigan
 Ottawa County Michigan
 Presque Isle County Michigan
 Roscommon County Michigan
 Saginaw County Michigan
 Saint Clair County Michigan
 Saint Joseph County Michigan
 Sanilac County Michigan
 Shiawassee County Michigan
 Tuscola County Michigan
 Van Buren County Michigan
 Washtenaw County Michigan
 Wayne County Michigan
 Wexford County Michigan
UFLower Peninsula, Michigan
 Southern Peninsula, Michigan
RTm
 Lake Saint Clair
SNS part of state S of Straits of Mackinack. Before 1981, search Michigan AND Lower Peninsula; Southern Peninsula. Added to Thesaurus in 1981.
Michigan Upper Peninsula  search
BTUnited States
 .Michigan
 ..Michigan Upper Peninsula
NTAlger County Michigan
 Baraga County Michigan
 Chippewa County Michigan
 Delta County Michigan
 Dickinson County Michigan
 Gogebic County Michigan
 Houghton County Michigan
 Iron County Michigan
 Keweenaw County Michigan
 Keweenaw Peninsula
 Luce County Michigan
 Mackinac County Michigan
 Marquette County Michigan
 Menominee County Michigan
 Ontonagon County Michigan
 Porcupine Mountains
 Schoolcraft County Michigan
UFNorthern Peninsula, Michigan
 Upper Peninsula, Michigan
RTMichigan Lower Peninsula
 Michigan Basin
SNN part of state between Lake Michigan and Lake Superior. Before 1981, search Michigan AND (Upper Peninsula OR Northern Peninsula). Added to Thesaurus in 1981.
Michipicoten Belt  search
BTNorth America
 .Canadian Shield
 ..Superior Province
 ...Michipicoten Belt
RTOntario
 Wawa Belt
SNGreenstone belt in Wawa sub-province of the Superior Province, Wawa and Gamitagama area of S Ontario. Added to Thesaurus in 1993.
Michipicoten Island  search
BTCanada
 .Eastern Canada
 ..Ontario
 ...Michipicoten Island
RTAlgoma District Ontario
 Thunder Bay District Ontario
SNNE Lake Superior.
Michoacan earthquake 1985  search
USEMexico City earthquake 1985
Michoacan Mexico  search
BTMexico
 .Michoacan Mexico
NTLos Azufres
 Paricutin
RTGuerrero Terrane
 Mexican volcanic belt
 Michoacan-Guanajuato volcanic field
 Mexico City earthquake 1985
SNState in SW Mexico, bordering on the Pacific Ocean.
Michoacan-Guanajuato volcanic field  search
BTMexico
 .Michoacan-Guanajuato volcanic field
RTGuanajuato Mexico
 Michoacan Mexico
SNMichoacan and Guanajuato, S central Mexico. Indexed with states as applicable. Added to Thesaurus in 1989.
micrinite  search
BTmacerals
 .inertinite
 ..micrinite
micrite  search
BTsedimentary rocks
 .carbonate rocks
 ..limestone
 ...micrite
RTbiomicrite
 micritization
 microcrystalline limestone
micritization  search
RTcarbonate rocks
 grain size
 micrite
SNAdded to Thesaurus in 1989.
microbial mats  search
USEalgal mats
microbiological geology  search
USEgeomicrobiology
microbiology, geological  search
USEgeomicrobiology
microbreccia  search
BTsedimentary rocks
 .clastic rocks
 ..microbreccia
RTbreccia
 sandstone
 terrigenous materials
 megabreccia
microcline  search
BTsilicates
 .framework silicates
 ..feldspar group
 ...alkali feldspar
 ....microcline
RTK-feldspar
 microclinization
 amazonite
microclinization  search
BTmetasomatism
 .microclinization
RTprocesses
 alteration
 microcline
SNAdded to Thesaurus in 1989.
Microcodium  search
BTPlantae
 .algae
 ..Microcodium
RTmicrofossils
SNIndexed with microfossils if applicable.
microcomputers  search
BTcomputers
 .microcomputers
UFmicroprocessors
RTdata processing
 computer networks
 minicomputers
 Macintosh
 hand calculators
 workstations
SNBefore 1993, also search personal computers or PCs if applicable.
microcontinents  search
RTaseismic ridges
 bottom features
 continental crust
 ocean floors
 plate tectonics
 tectonics
SNAdded to Thesaurus in 1993.
microcracks  search
BTcracks
 .microcracks
UFmicrofractures
RTengineering geology
 rock mechanics
 deformation
 fractures
microcraters  search
RTcraters
 Moon
microcrystalline limestone  search
BTsedimentary rocks
 .carbonate rocks
 ..limestone
 ...microcrystalline limestone
RTmicrite
SNAdded to Thesaurus in 1982.
microdiorite  search
BTigneous rocks
 .plutonic rocks
 ..diorites
 ...microdiorite
microearthquakes  search
BTearthquakes
 .microearthquakes
RTseismology
 microseisms
microelement  search
USEtrace elements
microfacies  search
RTfacies
 micropaleontology
 petrography
 thin sections
microfauna  search
USEmicrofossils
microflora  search
USEmicrofossils
microfossils  search
NTArcheocopida
 Charophyta
 Chitinozoa
 Conodonta
 Fusulinina
 Leperditicopida
 Lituolidae
 problematic microfossils
 scolecodonts
UFmicrofauna
 microflora
RTAcantharina
 acritarchs
 algae
 Allogromiina
 Alveolina
 Alveolinellidae
 Ammobaculites
 Ammodiscacea
 Ammodiscidae
 Ammonia
 Ammonia beccarii
 Amphistegina
 Anomalinidae
 Archaeolithothamnium
 Archaeomonadaceae
 Asterocyclina
 Astrorhizidae
 Ataxophragmiidae
 bacteria
 Bai
SNBefore 1998, narrower terms included algae, Ostracoda, Protista (Foraminifera, Radiolaria), palynomorphs.
microfractures  search
USEmicrocracks
microgabbro  search
BTigneous rocks
 .plutonic rocks
 ..gabbros
 ...microgabbro
microgranite  search
BTigneous rocks
 .plutonic rocks
 ..granites
 ...microgranite
microhardness  search
RThardness
 minerals
 physical properties
microlite  search
BThalides
 .fluorides
 ..microlite
BToxides
 .niobates
 ..niobotantalates
 ...microlite
RTpyrochlore
SNThis term has multiple hierarchies.
micrometeorites  search
BTmeteorites
 .micrometeorites
SNVery small meteorite or meteoritic particle with diameter generally less than a millimeter.
micromorphology  search
RTmorphology
 soils
Micronesia  search
BTOceania
 .Micronesia
NTCaroline Islands
 Mariana Islands
 Marshall Islands
 Nauru Island
UFFederated States of Micronesia
RTPacific Ocean
 West Pacific Ocean Islands
 Kiribati
SNCollective name for islands E of the Philippine Islands and S of Japan. Indexed with island groups as applicable.
microorganisms  search
RTalgae
 bacteria
 biota
 faunal studies
 floral studies
 fungi
 geomicrobiology
 microfossils
 pollen
 Protista
 soils
SNFor several types.
micropaleontology  search
RTbiologic evolution
 Foraminifera
 fossil record
 fossils
 geomicrobiology
 microfacies
 paleobotany
 paleontology
 palynology
 sample preparation
 stratigraphy
SNUsed for the discipline as a whole.
micropegmatite  search
BTigneous rocks
 .plutonic rocks
 ..granites
 ...micropegmatite
RTgraphic granite
 pegmatite
microperthite  search
BTsilicates
 .framework silicates
 ..feldspar group
 ...alkali feldspar
 ....microperthite
RTperthite
micropetrological unit  search
USEmacerals
microplankton  search
USEplankton
microplates  search
RTEaster Microplate
 Explorer Plate
 Juan Fernandez Microplate
 plate tectonics
 plates
microprobe, electron  search
USEelectron probe
microprocessors  search
USEmicrocomputers
micropulsations  search
SNAs of 1993, no longer a valid term for GeoRef. Usually out-of-scope. Used with aurora.
microscope methods  search
UFmicroscope techniques
 microscopic methods
RTpetrology
 reflectance
 atomic force microscopy
 methods
 mineralogy
 sedimentary petrology
 polished sections
 thin sections
 goniometry
 petrography
 optical mineralogy
 ore microscopy
 undulatory extinction
 universal stage
microscope techniques  search
USEmicroscope methods
microscopic methods  search
USEmicroscope methods
microscopy, electron  search
USEelectron microscopy
microscopy, ore  search
USEore microscopy
microseismic methods  search
RTgeophysical methods
 microseisms
 seismic methods
SNAdded to Thesaurus in 1985.
microseismicity  search
USEseismicity
microseisms  search
RTearthquakes
 microearthquakes
 microseismic methods
 noise
 seismology
microstructure  search
SNA valid term through 1978. After 1978, use ultrastructure.
microstylolites  search
BTsedimentary structures
 .secondary structures
 ..microstylolites
RTstylolites
 stylolitization
microsyenite  search
BTigneous rocks
 .plutonic rocks
 ..syenites
 ...microsyenite
microtectonics  search
SNA valid term through 1975. After 1975, use structural analysis.
microtektites  search
BTtektites
 .microtektites
microthermometry  search
RTfluid inclusions
 geologic thermometry
 phase equilibria
SNAdded to Thesaurus in 1985.
Microtus  search
BTChordata
 .Vertebrata
 ..Tetrapoda
 ...Mammalia
 ....Theria
 .....Eutheria
 ......Rodentia
 .......Myomorpha
 ........Cricetidae
 .........Microtus
SNGenus.
microwave exploration  search
USEmicrowave methods
microwave methods  search
UFmicrowave exploration
RTwell-logging
 geophysical methods
 geophysical surveys
 remote sensing
 methods
 radar methods
 ERS-1
 ground-penetrating radar
 telemetry
SNBefore 1978, also search microwave. For surveys, also geophysical surveys and the area.
microwave spectroscopy  search
BTspectroscopy
 .microwave spectroscopy
RTchemical analysis
 analysis
SNBefore 1978, also search spectroscopy AND microwave.
microzonation  search
RTearthquake prediction
 earthquakes
 geologic hazards
 ground motion
 seismic response
 seismic risk
 seismic zoning
SNAdded to Thesaurus in 1985.
Mid-  search
Mid-Antarctic Ridge  search
BTAntarctic Ocean
 .Mid-Antarctic Ridge
SNAdded to Thesaurus in 1981.
Mid-Arctic Ocean Ridge  search
BTArctic Ocean
 .Mid-Arctic Ocean Ridge
UFGakkel Ridge
 Nansen-Gakkel Ridge
RTmid-ocean ridges
 Eurasia Basin
SNAdded to Thesaurus in 1981.
Mid-Atlantic Ridge  search
BTAtlantic Ocean
 .Mid-Atlantic Ridge
NTSnakepit hydrothermal field
 TAG hydrothermal field
RTAtlantis fracture zone
 DSDP Site 10
 DSDP Site 11
 DSDP Site 14
 DSDP Site 15
 DSDP Site 16
 DSDP Site 17
 DSDP Site 18
 DSDP Site 332
 DSDP Site 333
 DSDP Site 334
 DSDP Site 335
 DSDP Site 353
 DSDP Site 395
 DSDP Site 396
 DSDP Site 407
 DSDP Site 408
 DSDP Site 410
 D
SNExtends parallel to the continental margins in mid ocean in both the North and South Atlantic oceans. Rises 6000 ft. above the ocean floor and surfaces as the Azores, Ascension Island, Saint Helena, and Tristan da Cunha islands.
Mid-Cayman Rise  search
BTAtlantic Ocean
 .North Atlantic
 ..Caribbean Sea
 ...Mid-Cayman Rise
SNNW Caribbean Sea, S of Cuba. Added to Thesaurus in 1981.
Mid-Continent  search
USEMidcontinent
Mid-continent Rift  search
USEKeweenawan Rift
mid-crustal  search
SNNot a valid term for GeoRef. See middle crust.
Mid-Indian Ocean Ridge  search
USEMid-Indian Ridge
Mid-Indian Ridge  search
BTIndian Ocean
 .Mid-Indian Ridge
NTCentral Indian Ridge
 Southeast Indian Ridge
UFIndian Ocean Ridge
 Indian Ridge
 Mid-Indian Ocean Ridge
RTAntarctic Ocean
 mid-ocean ridges
 DSDP Site 251
SNExtends from S of the Maldives, S and SE into Antarctic waters.
mid-ocean ridge basalts  search
BTigneous rocks
 .volcanic rocks
 ..basalts
 ...mid-ocean ridge basalts
UFMORB
RTsea-floor spreading
 mid-ocean ridges
 spreading centers
mid-ocean ridges  search
UFmid-oceanic ridges
 midoceanic ridges
 ocean ridges
RTbottom features
 Australian-Antarctic discordance
 aseismic ridges
 Mid-Atlantic Ridge
 Juan de Fuca Ridge
 black smokers
 Carlsberg Ridge
 Central Indian Ridge
 Chile Ridge
 Galapagos Rift
 East Pacific Rise
 Mid-Arctic Ocean Ridge
 fracture zones
 median valley
 Mid-
mid-oceanic ridges  search
USEmid-ocean ridges
Mid-Pacific Mountains  search
BTPacific Ocean
 .North Pacific
 ..Mid-Pacific Mountains
NTResolution Seamount
RTDSDP Site 313
 DSDP Site 463
 Leg 62
 Leg 143
 ODP Site 865
 ODP Site 866
 ODP Site 867
 ODP Site 868
SNNW central Pacific, N of the Marshall Islands. Added to Thesaurus in 1995.
Mid-Pacific Rise  search
SNAfter 1994, not a valid term for GeoRef. See Mid-Pacific Mountains if applicable.
Midcontinent  search
BTUnited States
 .Midcontinent
UFMid-Continent
RTNew Mexico
 Montana
 Iowa
 Kentucky
 Missouri
 Oklahoma
 Colorado
 Illinois
 Indiana
 Nebraska
 North Dakota
 Ohio
 Minnesota
 Kansas
 Michigan
 South Dakota
 Arkansas
 North American Craton
 Midcontinent geophysical anomaly
 Reelfoot Rift
 Southern Oklahoma Aulacogen
 Tennes
SNMid-America between the Appalachians and the Rocky Mountains. Indexed with states as applicable.
Midcontinent geophysical anomaly  search
BTUnited States
 .Midcontinent geophysical anomaly
UFMidcontinent high
RTIowa
 Nebraska
 Kansas
 Midcontinent
SNCentral and W Iowa, NE Kansas and SE Nebraska. Indexed with states as applicable. Added to Thesaurus in 1985.
Midcontinent high  search
USEMidcontinent geophysical anomaly
Midcontinent Rift  search
USEKeweenawan Rift
Midcontinent Rift System  search
USEKeweenawan Rift
Middendorf Formation  search
BTChronostratigraphic Units
 .Phanerozoic
 ..Mesozoic
 ...Cretaceous
 ....Upper Cretaceous
 .....Middendorf Formation
RTSouth Carolina
 Georgia
 Atlantic Coastal Plain
SNE Georgia and E South Carolina. Added to Thesaurus in 1985.
middens  search
NTpackrat middens
RTarchaeological sites
 archaeology
 diet
 Neotoma
 paleoecology
SNAdded to Thesaurus in 1985.
Middle America Trench  search
BTPacific Ocean
 .North Pacific
 ..Northeast Pacific
 ...Middle America Trench
RTODP Site 1039
 DSDP Site 565
 Leg 84
 DSDP Site 566
 DSDP Site 567
 DSDP Site 568
 DSDP Site 570
 Leg 170
SNOff W coast of Mexico and Central America. This term has multiple hierarchies.
middle Archean  search
BTChronostratigraphic Units
 .Precambrian
 ..Archean
 ...middle Archean
Middle Atlantic Bight  search
BTUnited States
 .Middle Atlantic Bight
RTAtlantic Coastal Plain
 North Atlantic
SNOff E coast of United States, from Cape Hatteras to Cape Cod. Added to Thesaurus in 1985.
Middle Atlas  search
BTAfrica
 .North Africa
 ..Atlas Mountains
 ...Moroccan Atlas Mountains
 ....Middle Atlas
SNRange of the Atlas Mountains N and E of the High Atlas Mountains in N central Morocco. This term has multiple hierarchies.
Middle Cambrian  search
BTChronostratigraphic Units
 .Phanerozoic
 ..Paleozoic
 ...Cambrian
 ....Middle Cambrian
NTBarrandian
 Bright Angel Shale
 Burgess Shale
 Carlton Rhyolite
 Flathead Sandstone
 Marjum Formation
 Metaline Limestone
 Pagoda Formation
 Wheeler Formation
RTAcadian
 Lower Cambrian
 Upper Cambrian
 Lancara Formation
Middle Carboniferous  search
BTChronostratigraphic Units
 .Phanerozoic
 ..Paleozoic
 ...Carboniferous
 ....Middle Carboniferous
RTDinantian
 Upper Carboniferous
middle Cenozoic  search
BTChronostratigraphic Units
 .Phanerozoic
 ..Cenozoic
 ...middle Cenozoic
SNAdded to Thesaurus in 1989.
Middle Cretaceous  search
BTChronostratigraphic Units
 .Phanerozoic
 ..Mesozoic
 ...Cretaceous
 ....Middle Cretaceous
NTBhuj Series
 Winton Formation
RTLower Cretaceous
 Upper Cretaceous
 Cenomanian
 Turonian
middle crust  search
BTcrust
 .middle crust
RTdiscontinuities
 earthquakes
 faults
 intrusions
 lower crust
 Conrad discontinuity
 upper crust
 diapirism
SNAlso search mid-crustal. Added to Thesaurus in 1995.
Middle Devonian  search
BTChronostratigraphic Units
 .Phanerozoic
 ..Paleozoic
 ...Devonian
 ....Middle Devonian
NTEifelian
 Givetian
 Balaklala Rhyolite
 Boyle Dolomite
 Cedar Valley Formation
 Columbus Limestone
 Copley Greenstone
 Couvinian
 Delaware Limestone
 Detroit River Group
 Dundee Limestone
 Elk Point Group
 Hamilton Group
 Jeffersonville Limestone
 Ludlowville Formation
 Mahantango Formation
 Marcellus Shale
 Michelle Formation
 Moscow Formation
 Nahanni Formation
 Onondaga Limestone
 Prairie Evaporite
 Saint Laurent Limestone
 Sylvania Formation
 Tioga Bentonite
 Tully Limestone
 Winnipegosis Formation
RTLower Devonian
 Upper Devonian
 Beaverhill Lake Group
 Martin Formation
 Swan Hills Formation
 Lucas Formation
 Fisset Brook Formation
 Ross Formation
 Zlichovian
Middle East  search
BTAsia
 .Middle East
NTArava Valley
 Cyprus
 Dead Sea
 Dead Sea Rift
 Iran
 Iraq
 Israel
 Jordan
 Lebanon
 Mesopotamia
 Palestine
 Samaria
 Syria
 Tigris River
 Turkey
 Wadi Araba
 Zagros
RTUnited Arab Emirates
 Yemen
 Nubian Sandstone
 Troodos Ophiolite
 Egypt
 Zubair Formation
 Arabian Peninsula
 Jordan River
 Jordan Valley
 Red Sea Basin
 Ghareb Formation
 Sinjar Formation
 Menuha Formation
 Kuwait
 Oman
 Qatar
SNAn indefinite and unofficial term comprising a region including Cyprus and the countries of SW Asia. Indexed with countries as applicable.
middle Eocene  search
BTChronostratigraphic Units
 .Phanerozoic
 ..Cenozoic
 ...Paleogene
 ....Eocene
 .....middle Eocene
NTAycross Formation
 Carrizo Sand
 Claiborne Group
 Cockfield Formation
 Cook Mountain Formation
 Laney Shale Member
 Lisbon Formation
 Queen City Formation
 Santee Limestone
 Sparta Sand
 Tallahatta Formation
 Tyee Formation
 Ulatisian
 Yegua Formation
RTlower Eocene
 upper Eocene
 Cozy Dell Formation
 Narizian
Middle Franconia  search
BTEurope
 .Central Europe
 ..Germany
 ...Bavaria Germany
 ....Middle Franconia
RTFranconia
 Franconian Jura
SNPart of old historical region of Franconia. A hilly region in Franconian Jura in N central Bavaria, S Germany.
middle Holocene  search
BTlocene
 .middle Holocene
Middle Jurassic  search
BTChronostratigraphic Units
 .Phanerozoic
 ..Mesozoic
 ...Jurassic
 ....Middle Jurassic
NTAalenian
 Bajocian
 Bathonian
 Callovian
 Dogger
 Page Sandstone
 Todilto Formation
RTLower Jurassic
 Upper Jurassic
 Garn Formation
 Coast Range Ophiolite
 Scarborough Formation
middle Liassic  search
BTChronostratigraphic Units
 .Phanerozoic
 ..Mesozoic
 ...Jurassic
 ....Lower Jurassic
 .....middle Liassic
NTDomerian
 Pliensbachian
SNAdded to Thesaurus in 1981.
middle Mesozoic  search
BTChronostratigraphic Units
 .Phanerozoic
 ..Mesozoic
 ...middle Mesozoic
RTupper Mesozoic
middle Miocene  search
BTChronostratigraphic Units
 .Phanerozoic
 ..Cenozoic
 ...Neogene
 ....Miocene
 .....middle Miocene
NTCalvert Formation
 Choptank Formation
 Helvetian
 Luisian
 San Onofre Breccia
 Serravallian
RTlower Miocene
 Kirkwood Formation
 Badenian
 upper Miocene
 Clarendonian
 Picture Gorge Basalt
 Grande Ronde Basalt
 Wanapum Basalt
 Relizian
 Mohnian
Middle Mississippian  search
BTChronostratigraphic Units
 .Phanerozoic
 ..Paleozoic
 ...Carboniferous
 ....Mississippian
 .....Middle Mississippian
Middle Nile Valley  search
BTAfrica
 .North Africa
 ..Egypt
 ...Middle Nile Valley
RTNile Valley
SNUsed for the Nile Valley in Egypt. Added to Thesaurus in 1981.
middle Oligocene  search
BTChronostratigraphic Units
 .Phanerozoic
 ..Cenozoic
 ...Paleogene
 ....Oligocene
 .....middle Oligocene
NTBucatunna Formation
 Byram Formation
 Marianna Limestone
 Vicksburg Group
RTupper Oligocene
 White River Group
 Brule Formation
 lower Oligocene
Middle Ordovician  search
BTChronostratigraphic Units
 .Phanerozoic
 ..Paleozoic
 ...Ordovician
 ....Middle Ordovician
NTDarriwilian
 Stage 3
 Ammonoosuc Volcanics
 Bigby-Cannon Limestone
 Bigfork Chert
 Black River Group
 Blackriverian
 Bromide Formation
 Champlainian
 Chazy Group
 Chazyan
 Cloridorme Formation
 Decorah Shale
 Dubuque Formation
 Everton Formation
 Galena Dolomite
 Glenwood Shale
 High Bridge Group
 Holston Formation
 Lenoir Limestone
 Lexington Limestone
 Llandeilian
 Llanvirnian
 Millbrig Bentonite Bed
 Normanskill Formation
 Partridge Formation
 Platteville Formation
 Saint Peter Sandstone
 Schenectady Formation
 Shadow Lake Formation
 Simpson Group
 Stones River Group
 Swan Peak Formation
 Table Head Group
 Trentonian
 Whiterockian
 Winnipeg Formation
 Woods Hollow Shale
RTLower Ordovician
 Upper Ordovician
 Bala
 Tippecanoe Sequence
middle Paleocene  search
BTChronostratigraphic Units
 .Phanerozoic
 ..Cenozoic
 ...Paleogene
 ....Paleocene
 .....middle Paleocene
middle Paleozoic  search
BTChronostratigraphic Units
 .Phanerozoic
 ..Paleozoic
 ...middle Paleozoic
NTHillabee Chlorite Schist
RTAcadian Phase
 Phuket Group
Middle Pennsylvanian  search
BTChronostratigraphic Units
 .Phanerozoic
 ..Paleozoic
 ...Carboniferous
 ....Pennsylvanian
 .....Middle Pennsylvanian
NTAllegheny Group
 Atokan
 Breathitt Formation
 Carbondale Formation
 Desmoinesian
 Dugger Formation
 Hermosa Formation
 Kanawha Formation
 Kewanee Group
 Manakacha Formation
 Paradox Member
 Petersburg Formation
 Spoon Formation
 Staunton Formation
 Tradewater Formation
RTUpper Pennsylvanian
 Lower Pennsylvanian
Middle Permian  search
BTChronostratigraphic Units
 .Phanerozoic
 ..Paleozoic
 ...Permian
 ....Middle Permian
RTKungurian
 Lower Permian
 Rotliegendes
 Upper Permian
 Barren Measures
Middle Pleistocene  search
BTChronostratigraphic Units
 .Phanerozoic
 ..Cenozoic
 ...Quarternary
 ....Pleistocene
 .....Middle Pleistocene
NTElsterian
middle Pliocene  search
BTChronostratigraphic Units
 .Phanerozoic
 ..Cenozoic
 ...Neogene
 ....Pliocene
 .....middle Pliocene
NTBone Valley Formation
 Peace Valley Beds
RTupper Pliocene
 lower Pliocene
middle Precambrian  search
BTChronostratigraphic Units
 .Precambrian
 ..middle Precambrian
RTAphebian
middle Proterozoic  search
USEMesoproterozoic
middle Quaternary  search
BTChronostratigraphic Units
 .Phanerozoic
 ..Cenozoic
 ...Quaternary
 ....middle Quaternary
Middle Run Fo  search
Middle Run Formation  search
RTIndiana
 Kentucky
 Ohio
 Precambrian
 Proterozoic
SNMay be Precambrian in age. In the East Continent Rift basin, Cincinnati Arch area of W Ohio, N central Kentucky and SE Indiana. Indexed with age as applicable. Added to Thesaurus in 1995.
Middle Silurian  search
BTChronostratigraphic Units
 .Phanerozoic
 ..Paleozoic
 ...Silurian
 ....Middle Silurian
NTClinton Group
 Guelph Formation
 Keefer Sandstone
 McKenzie Formation
 Niagaran
 Roberts Mountains Formation
 Rochester Formation
 Rose Hill Formation
 Waldron Shale
RTLower Silurian
 Upper Silurian
Middle Stone Age  search
USEMesolithic
middle Tertiary  search
BTChronostratigraphic Units
 .Phanerozoic
 ..Cenozoic
 ...Tertiary
 ....middle Tertiary
NTSoda Lake Shale Member
RTupper Tertiary
 lower Tertiary
Middle Triassic  search
BTChronostratigraphic Units
 .Phanerozoic
 ..Mesozoic
 ...Triassic
 ....Middle Triassic
NTAniasian
 Ladinian
 Anisian
 Doig Formation
 Muschelkalk
RTLower Triassic
 Upper Triassic
 Cordevolian
 Halfway Formation
 Serebryanka Formation
Middle Tunguska River  search
USEStony Tunguska River
Middle West (United States)  search
USEMidwest
Middlesex County Connecticut  search
BTUnited States
 .Connecticut
 ..Middlesex County Connecticut
SNS Connecticut.
Middlesex County Massachusetts  search
BTUnited States
 .Massachusetts
 ..Middlesex County Massachusetts
NTCambridge Massachusetts
RTMerrimack River valley
SNNE Massachusetts.
Middlesex County New Jersey  search
BTUnited States
 .New Jersey
 ..Middlesex County New Jersey
RTRaritan Bay
SNE New Jersey.
Middlesex County Ontario  search
BTCanada
 .Eastern Canada
 ..Ontario
 ...Middlesex County Ontario
Middlesex County Virginia  search
BTUnited States
 .Virginia
 ..Middlesex County Virginia
SNE Virginia.
Middleton Island  search
RTGulf of Alaska
 Southern Alaska
 Yakataga Formation
SNS Alaska, in Gulf of Alaska. May also occur in other locations. Indexed with Southern Alaska or region as applicable. Added to Thesaurus in 1989.
Midlan  search
Midland Basin  search
BTUnited States
 .Texas
 ..Midland Basin
RTPermian Basin
SNW Texas. Indexed with counties as applicable.
Midland County Michigan  search
BTUnited States
 .Michigan
 ..Michigan Lower Peninsula
 ...Midland County Michigan
SNE central Michigan.
Midland County Texas  search
BTUnited States
 .Texas
 ..Midland County Texas
NTMidland Texas
RTAzalea Field
SNW Texas.
Midland Texas  search
BTUnited States
 .Texas
 ..Midland County Texas
 ...Midland Texas
SNCity in W Texas.
Midland Valley  search
RTIreland
 New Brunswick
 Scotland
SNS Scotland. Also in New Brunswick and other locations. Indexed with regions as applicable. Added to Thesaurus in 1981.
Midlands  search
RTDerbyshire England
 Dudley England
 East Midlands
 England
 Leicestershire England
 Northamptonshire England
 Nottinghamshire England
 Pennines
 Staffordshire England
 Warwickshire England
 Worcestershire England
SNEnglish region including the highly industrialized central counties. Refers especially to Derbyshire, Leicestershire, Northamptonshire, Nottinghamshire, Rutlandshire, Staffordshire, and Warwickshire. May occur in other locations. Indexed with England or r
Midlothian Scotland  search
BTEurope
 .Western Europe
 ..United Kingdom
 ...Great Britain
 ....Scotland
 .....Midlothian Scotland
NTEdinburgh Scotland
RTLothian region Scotland
SNFormerly Edinburghshire. Former county in SE Scotland on S shore of Firth of Forth. Split between Borders region and Lothian region in 1974.
Midnite Mine  search
BTUnited States
 .Washington
 ..Midnite Mine
RTmines
 uranium ores
 Stevens County Washington
 Spokane County Washington
SNUranium mine in NE Washington. Added to Thesaurus in 1985.
midoceanic ridges  search
USEmid-ocean ridges
Midway  search
BTEast Pacific Ocean Islands
 .Midway
UFMidway Atoll
 Midway Islands
SNTwo small islands (Eastern and Sand), parts of a low coral atoll under U.S. Navy control 1300 miles WNW of Honolulu.
Midway Atoll  search
USEMidway
Midway Group  search
BTChronostratigraphic Units
 .Phanerozoic
 ..Cenozoic
 ...Paleogene
 ....Paleocene
 .....Midway Group
RTKentucky
 Missouri
 Illinois
 Mississippi
 Texas
 Alabama
 Florida
 Georgia
 Tennessee
 Arkansas
 Clayton Formation
 Naheola Formation
 Porters Creek Formation
SNIn SE United States from W Georgia to S Texas, Arkansas, SW Illinois, Kentucky, SE Missouri, and W Tennessee. Added to Thesaurus in 1981.
Midway Islands  search
USEMidway
Midway-Sunset Field  search
BTUnited States
 .California
 ..Midway-Sunset Field
UFSunset-Midway oil field
RToil and gas fields
 Kern County California
 San Luis Obispo California
SNKern and San Luis Obispo counties, SW California. Indexed with Kern County California and/or San Luis Obispo County California as applicable. Added to Thesaurus in 1995.
Midwest  search
BTUnited States
 .Midwest
UFMiddle West (United States)
 North Central (United States)
 North-Central (United States)
RTEastern Gas Shales Project
 Tippecanoe Sequence
 Mississippi Valley
 Sauk Sequence
SNAs of 1993, term is used only for broad general discussions. N part of central U.S. Region comprising states N of the Ohio and Missouri rivers plus the E edge of the Great Plains. Before 1978, also search United States AND middle west or north-central or
Midwest Lake  search
RTAthabasca District
 Saskatchewan
SNN Saskatchewan. Indexed with province or region as applicable. Added to Thesaurus in 1985.
Midwest Lake Deposits  search
BTCanada
 .Western Canada
 ..Saskatchewan
 ...Midwest Lake Deposits
RTAthabasca District
 uranium ores
SNN Saskatchewan. Before 1993, also search Midwest Lake. Added to Thesaurus in 1993.
Mie Japan  search
BTAsia
 .Far East
 ..Japan
 ...Mie Japan
UFMiye Japan
RTIse Bay
 Honshu
 Oita Japan
 Kinki Japan
 Kii Peninsula
 Tonankai earthquake 1944
SNPrefecture in S central Honshu. Also a town on Kyushu. Indexed with Honshu or Oita Japan as applicable.
Miechow Poland  search
BTEurope
 .Central Europe
 ..Poland
 ...Cracow Poland
 ....Miechow Poland
SNTown in S Poland.
Miette Complex  search
BTChronostratigraphic Units
 .Phanerozoic
 ..Paleozoic
 ...Devonian
 ....Miette Complex
RTCanada
 Miette Group
SNDevonian reef complex. Distinguish from Miette Group.
Miette Group  search
BTChronostratigraphic Units
 .Precambrian
 ..Proterozoic
 ...Miette Group
RTAlberta
 Canada
 British Columbia
 Miette Complex
SNComposed of a basal unit of argillite and argillaceous sandstone, succeeded by 2, 000 feet of sandstone, grit, conglomerate, and argillite, which is overlain by 3, 000 feet of argillite, and at the top by a carbonate. Distinguish from the Devonian Miette
Mifflin County Pennsylvania  search
BTUnited States
 .Pennsylvania
 ..Mifflin County Pennsylvania
mighei type  search
USECM chondrites
migmatites  search
BTmetamorphic rocks
 .migmatites
NTagmatite
 anatexite
 ectinite
 embrechite
 leucosomes
RTrestites
 flow texture
 migmatization
 ptygmatic folds
migmatitization  search
USEmigmatization
migmatization  search
BTmetamorphism
 .migmatization
UFmigmatitization
RTmigmatites
migration  search
RTbiogeography
 land bridges
 migration of elements
 petroleum
 petroleum accumulation
 petroleum exploration
 poststack migration
 prestack migration
 primary migration
 secondary migration
 seismic migration
 transport
SNUsed primarily for animal migration and petroleum migration. Use seismic migration if applicable. Migration of elements may be used for geochemistry. Use transport for pollution studies.
migration (seismic)  search
USEseismic migration
migration of elements  search
RTchemical elements
 differentiation
 diffusivity
 enrichment
 geochemical cycle
 lithogeochemistry
 magma transport
 metamorphism
 migration
 geochemistry
 mobilization
 thermal waters
 weathering
Mihara (Mount)  search
USEMount Mihara
Mihara Volcano  search
USEMount Mihara
Mihara-Yama  search
USEMount Mihara
Miho Bay  search
BTnshu
 .Miho Bay
RTJapan Sea
SNInlet of Japan Sea in S Honshu.
Mikabu System  search
BTChronostratigraphic Units
 .Phanerozoic
 ..Paleozoic
 ...Mikabu System
RTHonshu
 Japan
SNMikabu Series, Paleozoic. Consists of amphibole, pyroxene, semi-schists, and phyllites with limestones and quartzites.
Mikawa  search
BTnshu
 .Aichi Japan
 ..Mikawa
SNFormer province in central Honshu. Now part of Aichi Prefecture.
Mikhailovka Russian Federation  search
BTCommonwealth of Independent States
 .Russian Federation
 ..Volgograd Russian Federation
 ...Mikhailovka Russian Federation
SNCity in Volgograd Oblast 110 miles NW of Volgograd in European Russian Federation. Before 1993, Mikhailovka Russian Republic was also used. This term has multiple hierarchies.
Milam County Texas  search
BTUnited States
 .Texas
 ..Milam County Texas
SNCentral Texas.
Milan Italy  search
BTEurope
 .Southern Europe
 ..Italy
 ...Lombardy Italy
 ....Milan Italy
UFMilano Italy
SNProvince including the city in W Lombardy, N Italy.
Milankovitch forcing  search
USEorbital forcing
Milankovitch theory  search
RTatmosphere
 cyclostratigraphy
 Earth
 eccentricity
 glacial geology
 glaciation
 insolation
 motions
 obliquity of the ecliptic
 orbital forcing
 paleoclimatology
 periodicity
 precession
SNAdded to Thesaurus in 1985.
Milano Italy  search
USEMilan Italy
milarite  search
BTsilicates
 .ring silicates
 ..milarite
RTaluminosilicates
Mildura Australia  search
BTAustralasia
 .Australia
 ..Victoria Australia
 ...Mildura Australia
SNTown on the Murray River 300 miles NW of Melbourne in NW Victoria.
Miliolacea  search
BTInvertebrata
 .Protista
 ..Foraminifera
 ...Miliolina
 ....Miliolacea
NTAlveolinellidae
 Miliolidae
 Ophthalmidium
 Quinqueloculina
RTmicrofossils
SNIndexed with microfossils if applicable.
Miliolidae  search
BTInvertebrata
 .Protista
 ..Foraminifera
 ...Miliolina
 ....Miliolacea
 .....Miliolidae
RTmicrofossils
SNFamily. Indexed with microfossils if applicable.
Miliolina  search
BTInvertebrata
 .Protista
 ..Foraminifera
 ...Miliolina
NTMiliolacea
RTmicrofossils
SNIndexed with microfossils if applicable.
military facilities  search
RTairports
 engineering geology
 environmental geology
 land use
 military geology
 wars
SNAdded to Thesaurus in 1998.
military geology  search
RTgeology
 military facilities
 wars
 World War II
SNFor papers on impact of geosciences on military operations. Use military facilities for site-specific environmental problems. For conflicts, also use wars. Added to Thesaurus in 1981.
Milk River Formation  search
BTChronostratigraphic Units
 .Phanerozoic
 ..Mesozoic
 ...Cretaceous
 ....Upper Cretaceous
 .....Milk River Formation
RTAlberta
 Canada
SNComposed of well-sorted sandstones. In S Alberta.
Mill Creek  search
RTLassen Volcanic National Park
 California
 Redwood Creek
 Sacramento River
SNRises in Lassen Volcanic National Park and flows into Sacramento River. Indexed with counties or regions as applicable.
Millard County Utah  search
BTUnited States
 .Utah
 ..Millard County Utah
NTHouse Range
RTSevier Desert
 Wah Wah Mountains
 Black Rock Desert
 Drum Mountains
SNW central Utah.
Millboro Shale  search
BTChronostratigraphic Units
 .Phanerozoic
 ..Paleozoic
 ...Devonian
 ....Millboro Shale
RTVirginia
 Pennsylvania
 Maryland
 West Virginia
SNMiddle and Upper Devonian. Maryland, S Pennsylvania, Virginia and E West Virginia. Added to Thesaurus in 1989.
Millbrig Bentonite Bed  search
BTChronostratigraphic Units
 .Phanerozoic
 ..Paleozoic
 ...Ordovician
 ....Middle Ordovician
 .....Millbrig Bentonite Bed
RTIowa
 Missouri
 Illinois
 Wisconsin
 Minnesota
 Decorah Shale
SNOf Glencoe Member of Spechts Ferry Formation in NW Illinois and Wisconsin. Also may be of Decorah Shale in Iowa, Minnesota, and Missouri. Added to Thesaurus in 1995.
Mille Lacs County Minnesota  search
BTUnited States
 .Minnesota
 ..Mille Lacs County Minnesota
Miller County Arkansas  search
BTUnited States
 .Arkansas
 ..Miller County Arkansas
Miller County Georgia  search
BTUnited States
 .Georgia
 ..Miller County Georgia
Miller County Missouri  search
BTUnited States
 .Missouri
 ..Miller County Missouri
millerite  search
BTsulfides
 .millerite
UFnickel pyrites
RTnickel ores
Millevaches Plateau  search
BTEurope
 .Western Europe
 ..France
 ...Central Massif
 ....Millevaches Plateau
RTCorreze France
 Creuse France
SNTableland of the Central Massif, in Correze and Creuse departments, central France. Added to Thesaurus in 1981.
Mills County Iowa  search
BTUnited States
 .Iowa
 ..Mills County Iowa
SNSW Iowa.
Mills County Texas  search
BTUnited States
 .Texas
 ..Mills County Texas
SNCentral Texas.
Millstone Grit  search
BTChronostratigraphic Units
 .Phanerozoic
 ..Paleozoic
 ...Carboniferous
 ....Upper Carboniferous
 .....Millstone Grit
SNProvincial series, Europe.
Milne Land  search
BTArctic region
 .Greenland
 ..Milne Land
RTScoresby Sound
SNAn island in Scoresby Sound, a deep inlet on the E coast.
Milos  search
BTMediterranean region
 .Aegean Islands
 ..Greek Aegean Islands
 ...Cyclades
 ....Milos
SNSE Aegean Islands. Before 1993, also search Melos and Greece. This term has multiple hierarchies. Added to Thesaurus in 1993.
milton County Ohio  search
NTCincinnati Ohio
Milwaukee County Wisconsin  search
BTUnited States
 .Wisconsin
 ..Milwaukee County Wisconsin
NTMilwaukee Wisconsin
SNSE Wisconsin.
Milwaukee Wisconsin  search
BTUnited States
 .Wisconsin
 ..Milwaukee County Wisconsin
 ...Milwaukee Wisconsin
SNCity on Lake Michigan in SE Wisconsin.
Mimas Satel  search
Mimas Satellite  search
RTicy satellites
 satellites
 Saturn
 Voyager Program
SNOne of satellites of Saturn. Before 1985, also search Mimas AND Saturn. Added to Thesaurus in 1985.
Mimbral, Arroyo El  search
USEArroyo El Mimbral
mimetite  search
BTarsenates
 .mimetite
BThalides
 .chlorides
 ..mimetite
SNThis term has multiple hierarchies.
Mimomys  search
BTChordata
 .Vertebrata
 ..Tetrapoda
 ...Mammalia
 ....Theria
 .....Eutheria
 ......Rodentia
 .......Myomorpha
 ........Cricetidae
 .........Mimomys
RTArvicolidae
SNGenus.
Minas Basin  search
BTCanada
 .Eastern Canada
 ..Maritime Provinces
 ...Nova Scotia
 ....Minas Basin
UFFundy Basin
RTBay of Fundy
 Cobequid Bay
SNNE extension of Bay of Fundy in central Nova Scotia. Also search Minas AND appropriate area term.
Minas Gerais Brazil  search
BTSouth America
 .Brazil
 ..Minas Gerais Brazil
NTAraxa Brazil
 Itabira Brazil
 Ouro Preto Brazil
 Pocos de Caldas Brazil
 Quadrilatero Ferrifero
RTSao Francisco Basin
 Areado Formation
 Brazilian Shield
 Sao Francisco Craton
 Serra do Espinhaco
 Bambui Group
 Bauru Formation
 Irati Formation
SNState in E central Brazil.
Minas Series  search
BTChronostratigraphic Units
 .Precambrian
 ..Minas Series
RTBrazil
Mindanao  search
BTAsia
 .Far East
 ..Philippine Islands
 ...Mindanao
NTKiamba Philippine Islands
RTSurigao del Norte Philippine Islands
SNSecond largest and southernmost major island of the Philippine Islands.
Mindel  search
BTChronostratigraphic Units
 .Phanerozoic
 ..Cenozoic
 ...Quarternary
 ....Pleistocene
 .....Mindel
RTElsterian
SNEurope. Above Gunz, below Riss.
Mindel-Riss  search
USEMindel/Riss Interglacial
Mindel-Riss Interglacial  search
USEMindel/Riss Interglacial
Mindel/Riss Interglacial  search
BTChronostratigraphic Units
 .Phanerozoic
 ..Cenozoic
 ...Quarternary
 ....Pleistocene
 .....Mindel/Riss Interglacial
UFMindel-Riss
 Mindel-Riss Interglacial
SNEurope. Term applied in the Alps to the second interglacial stage of the Pleistocene Epoch, after the Mindel glacial stage and before the Riss.
Mindoro  search
BTAsia
 .Far East
 ..Philippine Islands
 ...Mindoro
RTMansalay Formation
SNIsland in central Philippines SW of Luzon.
mine dewatering  search
RTdrainage
 drawdown
SNRestricted to artificial methods. Added to Thesaurus in 1993.
mine drainage  search
RTacid mine drainage
 drainage
 environmental geology
 mines
SNAs of 1993, use for natural drainage. Added to Thesaurus in 1981.
mine reactivation  search
RTeconomics
 land use
 mines
SNAdded to Thesaurus in 1981.
mine reclamation  search
SNNot a valid term for GeoRef. Use mines and reclamation.
Miner County South Dakota  search
BTUnited States
 .South Dakota
 ..Miner County South Dakota
minera  search
mineragraphy  search
USEore microscopy
mineral assemblages  search
RTautometamorphism
 metamorphic rocks
 paragenesis
mineral associations  search
SNA valid term through 1977. Use mineral assemblages.
mineral chemistry  search
USEcrystal chemistry
mineral cleavage  search
RTcleavage
 minerals
SNBefore 1981, search cleavage AND minerals. Added to Thesaurus in 1981.
mineral collecting  search
SNAs of 1981, no longer a valid term for GeoRef. Use collecting.
mineral collections  search
USEcollections
mineral composition  search
RTcomposition
 modal analysis
 petrographic norms
Mineral County Colorado  search
BTUnited States
 .Colorado
 ..Mineral County Colorado
NTCreede Caldera
 Creede Colorado
 Creede mining district
SNSW Colorado.
Mineral County Montana  search
BTUnited States
 .Montana
 ..Mineral County Montana
RTCoeur d'Alene mining district
SNW Montana.
Mineral County Nevada  search
BTUnited States
 .Nevada
 ..Mineral County Nevada
RTWalker Lake
 Stewart Valley
SNW Nevada.
Mineral County West Virginia  search
BTUnited States
 .West Virginia
 ..Mineral County West Virginia
SNE West Virginia.
mineral data  search
UFmineral descriptions
RTminerals
 clay mineralogy
 mineralogy
 data
mineral depo  search
mineral deposits,  search
mineral deposits, genesis  search
RTalgoma-type deposits
 alpine-type deposits
 Barrovian-type deposits
 bauxitization
 beneficiation
 besshi-type deposits
 blind deposits
 carlin-type deposits
 cementation deposits
 controls
 cyprus-type deposits
 detrital deposits
 discoveries
 disseminated deposits
 D
SNUsed for substantial discussions of the genesis of ore deposits. Does not include water resources or energy sources. Indexed with specific type of process or control where applicable.
mineral descriptions  search
USEmineral data
mineral economics  search
RTeconomic geology
 economics
 mineral resources
 ore grade
 possibilities
 productive capacity
SNAs of 1985, used for economic discussions of commodities (list C), excluding the energy sources, and water resources. Use economics for the energy sources, and water resources. To exclude very general treatments, search (mineral economics or economics) no
mineral exploration  search
UFore exploration
RTeconomic geology
 geochemical anomalies
 geochemical methods
 feasibility studies
 Bear-Slave Operation
 biogeochemical methods
 geobotanical methods
 blind deposits
 boulder trains
 discoveries
 exploration
 CUSMAP
 dispersion patterns
 Exclusive Economic Zone
 geoche
SNUsed primarily for the application of methods in relation to the commodity terms (list C), excluding the energy sources and water resources. May be used for substantial discussions of exploration for the commodities, excluding the energy sources and water
mineral facies  search
SNA valid term through 1976. Use facies.
mineral inclusions  search
BTinclusions
 .mineral inclusions
RTfluid inclusions
 host rocks
 xenocrysts
 San Carlos Olivine
 xenoliths
SNUsed for a solid-phase mineral within a solid-phase mineral.
mineral interlayer  search
UFinterlayering
RTminerals
 clay minerals
 sheet silicates
 crystal structure
 crystal chemistry
 layered materials
 mixed-layer minerals
SNAlso search mineral interlayers. Added to Thesaurus in 1995.
mineral inventory  search
UFmineral list
 miscellaneous minerals
 sundry minerals
RTminerals
 mineral resources
 mineralogy
 inventory
SNUsed for inventories of minerals. Includes use for the case of several mineral groups when the topic is not emphasized or for a mineral of unknown affinity. Added to Thesaurus in 1993.
mineral list  search
USEmineral inventory
mineral localities  search
RTcollecting
 geologic sites
 popular geology
SNUse for collecting. Added to Thesaurus in 1981.
Mineral Mountains  search
BTUnited States
 .Utah
 ..Beaver County Utah
 ...Mineral Mountains
RTBasin and Range Province
SNSW Utah. Added to Thesaurus in 1985.
mineral physics  search
SNNot a valid term for GeoRef. See phase transitions, geophysics, or specific property.
mineral resins  search
USEresins
mineral resources  search
RTaffinities
 AMRAP
 depletion
 economic geology
 environmental geology
 exploration
 Law of the Sea
 mineral deposits, genesis
 mineral economics
 mineral exploration
 mineral inventory
 minerals
 ocean floors
 potential deposits
 raw materials
 resources
 strategic miner
SNFor very general treatments of both metal and nonmetal deposits. Commodity. See List C.
mineral sequence  search
USEparagenesis
mineral soap  search
USEbentonite
mineral synthesis  search
SNA valid term through 1970. After 1970, use synthesis with crystal growth or with phase equilibria.
mineral waters  search
RTbrines
 ground water
 medicinal waters
 springs
 thermal waters
 water
mineral zoning  search
SNA valid term through 1975. See zoning, crystal zoning.
mineral-water interface  search
UFwater-mineral interface
RTinterfaces
 halmyrolysis
 water-rock interaction
 sediment-water interface
SNAlso search mineral-water interaction. Indexed with specific minerals as applicable. Added to Thesaurus in 1995.
mineralization  search
RTbiomineralization
 localization
 metallogenic epochs
 metallogenic provinces
 metallogeny
 mineral deposits, genesis
 mineralized mud
 ore-forming fluids
SNOften used with ore deposits. For paleontology use fossilization or biomineralization.
mineralized mud  search
RTmineralization
 mud
SNAdded to Thesaurus in 1985.
mineralogy  search
RTatomic packing
 bibliography
 catalogs
 clay mineralogy
 collecting
 collections
 crystal chemistry
 crystal growth
 crystal structure
 crystal zoning
 crystallography
 decrepitation
 goniometry
 lexicons
 microscope methods
 mineral data
 mineral inventory
 minerals
 opti
SNUsed for the discipline as a whole.
Mineralogy (category)  search
SNMineralogy, GeoRef category code 01, is one of thirty categories used to classify documents in GeoRef. Each reference in GeoRef is assigned one or more categories. Categories can be used, in addition to Terms, to refine searches (See List A.).
minerals  search
RTaccessory minerals
 alloys
 antimonates
 antimonides
 antimonites
 arsenates
 arsenides
 arsenites
 authigenesis
 authigenic minerals
 bismuthides
 borates
 carbonates
 cell dimensions
 chromates
 clay mineralogy
 coexisting minerals
 collecting
 collections
 color centers
SNUsed for descriptions of mineral occurrence or of the minerals themselves. For searching techniques, see list L. General term. Index only for general studies. Specific mineral names or groups should be used when applicable.
minerals described  search
SNNot a valid GeoRef index term after 1968. See minerals; mineral data.
minerals in meteorites  search
SNNot a valid GeoRef index term. Place minerals in appropriate group.
mines  search
NTabandoned mines
 coal mines
 small mines
RTacid mine drainage
 Adamow Mine
 Akenobe Mine
 Allarechenskiy
 Alligator Ridge Mine
 Alligator Rivers Field
 Alma mining district
 Ambrosia Lake mining district
 Anvil Points Mine
 Ashio Mine
 Asse Mine
 Balmat-Edwards mining district
 Bathurst mining district
 Belcha
SNBefore 1998, this term was limited to papers on mine engineering. For specific mines, also search: term for specific mine OR (term for region around the mine AND term for commodity mined). See list C for commodity terms. Indexed with in combination with s
minette  search
BTigneous rocks
 .plutonic rocks
 ..lamprophyres
 ...minette
Mingo County West Virginia  search
BTUnited States
 .West Virginia
 ..Mingo County West Virginia
minicomputers  search
BTcomputers
 .minicomputers
RTdata processing
 computer networks
 microcomputers
 hand calculators
 workstations
minidae  search
NTAustralopithecinae
 Homo
 Paranthropus
 Pithecanthropus
 Ramapithecus
Minidoka County Idaho  search
BTUnited States
 .Idaho
 ..Minidoka County Idaho
mining  search
NTcut-and-fill mining
 solution mining
 surface mining
 underground mining
RTdredged materials
 dredging
 economic geology
 fines
 mineral deposits, genesis
 mines
 mining geology
 mining legislation
 New Austrian Tunnelling Method
 pits
 placers
 quarries
 quartz diabase
 recovery
 spoils
 tailings
 tailings ponds
 tunnels
mining districts  search
SNNot a valid GeoRef term. Use names of individual districts as applicable.
mining engineering  search
SNNot a valid term for GeoRef. See engineering geology; mining geology.
mining geology  search
RTabandoned mines
 backfill
 chimneys
 coal mines
 cut-and-fill mining
 dredging
 economic geology
 engineering geology
 environmental geology
 evaluation
 explosions
 gases
 geology
 geophysical methods
 geophysical surveys
 horizontal drilling
 hydraulic fracturing
 leach
SNGeology applied to mining operations.
mining legislation  search
RTLaw of the Sea
 legislation
 mining
SNAdded to Thesaurus in 1981.
mining, cut-and-fill  search
USEcut-and-fill mining
mining, open-pit  search
USEopen-pit mining
minipermeameters  search
BTpermeameters
 .minipermeameters
UFprobe permeameters
RTpetroleum engineering
 instruments
 reservoir properties
 flowmeters
 pressuremeters
SNAdded to Thesaurus in 1995.
Minneapolis Minnesota  search
BTnnepin County Minnesota
 .Minneapolis Minnesota
SNCity in SE central Minnesota.
Minnehaha County South Dakota  search
BTUnited States
 .South Dakota
 ..Minnehaha County South Dakota
SNE South Dakota.
Minnelusa Formatio  search
Minnelusa Formation  search
BTChronostratigraphic Units
 .Phanerozoic
 ..Paleozoic
 ...Minnelusa Formation
RTPermian
 Pennsylvanian
 Wyoming
 South Dakota
SNPennsylvanian and Permian. Composed of sandstones and evaporites. W South Dakota, and NE Wyoming. Indexed with ages as applicable.
Minnesota  search
BTUnited States
 .Minnesota
NTAitkin County Minnesota
 Anoka County Minnesota
 Becker County Minnesota
 Beltrami County Minnesota
 Benton County Minnesota
 Big Stone County Minnesota
 Blue Earth County Minnesota
 Brown County Minnesota
 Carlton County Minnesota
 Carver County Minnesota
 Cass County Minnesota
 Chippewa County Minnesota
 Chisago County Minnesota
 Clay County Minnesota
 Clearwater County Minnesota
 Cook County Minnesota
 Cottonwood County Minnesota
 Crow Wing County Minnesota
 Dakota County Minnesota
 Dodge County Minnesota
 Douglas County Minnesota
 Duluth Complex
 Faribault County Minnesota
 Fillmore County Minnesota
 Freeborn County Minnesota
 Goodhue County Minnesota
 Grant County Minnesota
 Hennepin County Minnesota
 Houston County Minnesota
 Hubbard County Minnesota
 Isanti County Minnesota
 Itasca County Minnesota
 Jackson County Minnesota
 Kanabec County Minnesota
 Kandiyohi County Minnesota
 Kittson County Minnesota
 Koochiching County Minnesota
 Lac qui Parle County Minnesota
 Lake County Minnesota
 Lake of the Woods County Minnesota
 Le Sueur County Minnesota
 Lincoln County Minnesota
 Lyon County Minnesota
 Mahnomen County Minnesota
 Marshall County Minnesota
 Martin County Minnesota
 McLeod County Minnesota
 Meeker County Minnesota
 Mesabi Range
 Mille Lacs County Minnesota
 Minnesota River valley
 Morrison County Minnesota
 Mower County Minnesota
 Murray County Minnesota
 Nicollet County Minnesota
 Nobles County Minnesota
 Norman County Minnesota
 Olmsted County Minnesota
 Otter Tail County Minnesota
 Pennington County Minnesota
 Pine County Minnesota
 Pipestone County Minnesota
 Polk County Minnesota
 Pope County Minnesota
 Ramsey County Minnesota
 Red Lake County Minnesota
 Redwood County Minnesota
 Renville County Minnesota
 Rice County Minnesota
 Rock County Minnesota
 Roseau County Minnesota
 Saint Louis County Minnesota
 Scott County Minnesota
 Sherburne County Minnesota
 Sibley County Minnesota
 Stearns County Minnesota
 Steele County Minnesota
 Stevens County Minnesota
 Swift County Minnesota
 Todd County Minnesota
 Traverse County Minnesota
 Vermilion Range
 Wabasha County Minnesota
 Wadena County Minnesota
 Waseca County Minnesota
 Washington County Minnesota
 Watonwan County Minnesota
 Wilkin County Minnesota
 Winona County Minnesota
 Wright County Minnesota
 Yellow Medicine County Minnesota
RTCanadian Shield
 Animikie Group
 Biwabik Iron Formation
 Clearwater River
 Benton Formation
 Buffalo River
 Cedar Valley Formation
 Dakota Formation
 Decorah Shale
 Des Moines Lobe
 Dubuque Formation
 Eagle Lake
 Eau Claire Formation
 Elk Lake
 Franconia Formation
 Gale
Minnesota River valley  search
BTUnited States
 .Minnesota
 ..Minnesota River valley
SNS Minnesota.
Mino Belt  search
BTnshu
 .Mino Belt
UFMino Terrane
SNOrogenic belt in central Honshu, central Japan. Added to Thesaurus in 1989.
Mino Terrane  search
USEMino Belt
Minoan eruption  search
SNNot a valid term for GeoRef. Search Santorin AND eruptions. (Note added 1995.)
minor elements  search
RTchemical elements
 major elements
 nutrients
 trace elements
minor planets  search
USEasteroids
minor-element analyses  search
RTanalysis
 chemical analysis
 chemical elements
 major-element analyses
 trace-element analyses
SNBefore 1974, also search minor element analyses.
Minorca  search
BTMediterranean region
 .Balearic Islands
 ..Minorca
UFMenorca
SNSecond largest of Spain's Balearic Islands off E coast of Spanish mainland. This term has multiple hierarchies.
Minorca Rise  search
BTMediterranean Sea
 .West Mediterranean
 ..Minorca Rise
UFMenorca Rise
RTLeg 161
 ODP Site 975
SNOff Minorca in the Mediterranean Sea. Added to Thesaurus in 1981.
minorities  search
RTeducation
 geologists
 geology
 practice
SNAlso search women if applicable. Added to Thesaurus in 1995.
Minsk Belarus  search
BTEurope
 .Belarus
 ..Minsk Belarus
SNOblast and city in central Belarus. This term has multiple hierarchies.
Minturn Formation  search
BTChronostratigraphic Units
 .Phanerozoic
 ..Paleozoic
 ...Carboniferous
 ....Pennsylvanian
 .....Minturn Formation
RTColorado
SNConsists chiefly of grayish to greenish sandstones, conglomerates, and shales or siltstones. Central Colorado.
Minusinsk Basin  search
BTCommonwealth of Independent States
 .Russian Federation
 ..Minusinsk Basin
BTAsia
 .West Siberia
 ..Minusinsk Basin
RTcoal fields
 Krasnoyarsk Russian Federation
SNCoal basin in extreme S Krasnoyarsk Kray in SSW Siberia. A good agricultural region. This term has multiple hierarchies.
Minusinsk Russian Federation  search
BTCommonwealth of Independent States
 .Russian Federation
 ..Krasnoyarsk Russian Federation
 ...Minusinsk Russian Federation
SNTown in SW Krasnoyarsk Kray on the Yenisei River in SSW Siberia. Before 1993, Minusinsk Russian Republic was also used. This term has multiple hierarchies.
minyulite  search
BThalides
 .fluorides
 ..minyulite
BTphosphates
 .minyulite
SNThis term has multiple hierarchies.
Miocene  search
BTChronostratigraphic Units
 .Phanerozoic
 ..Cenozoic
 ...Neogene
 ....Miocene
NTAquitanian
 Burdigalian
 Langhian
 Serravallian
 Tortonian
 Messinian
 Astoria Formation
 Badenian
 Barstovian
 Barstow Formation
 Bullfrog Member
 Clarendonian
 Columbia River Basalt Group
 Crater Flat Tuff
 Fleming Formation
 Freites Formation
 Frenchman Springs Member
 Grande Ronde Basalt
 Green Tuff Formation
 Hawthorn Formation
 lower Miocene
 middle Miocene
 Mizunami Group
 Mohnian
 Monterey Formation
 Motojuku Formation
 Mushan Formation
 Ngorora Formation
 Oakville Sandstone
 Oficina Formation
 Oktemberyan Series
 Paintbrush Tuff
 Peach Springs Tuff
 Picture Gorge Basalt
 Pungo River Formation
 Relizian
 Saddle Mountains Basalt
 Saint Marys Formation
 Stevens Sandstone
 Surma Group
 Temblor Formation
 Topopah Spring Member
 upper Miocene
 Vallesian
 Vindobonian
 Wanapum Basalt
 Wood Mountain Formation
 Yakima Basalt
UFlower Neogene
RTAguacate Group
 Catahoula Formation
 Apache Leap Tuff
 Bluff Formation
 Browns Park Formation
 Carapita Formation
 Challis Volcanics
 Chesapeake
SNWorld. Above Oligocene, below Pliocene.
miogeoclines  search
USEmiogeosynclines
miogeosynclines  search
UFmiogeoclines
 miomagmatic zone
RTtectonics
 geosynclines
 eugeosynclines
Miogypsina  search
BTInvertebrata
 .Protista
 ..Foraminifera
 ...Rotaliina
 ....Rotaliacea
 .....Miogypsinidae
 ......Miogypsina
RTmicrofossils
SNGenus. Indexed with microfossils if applicable.
Miogypsinidae  search
BTInvertebrata
 .Protista
 ..Foraminifera
 ...Rotaliina
 ....Rotaliacea
 .....Miogypsinidae
NTMiogypsina
RTmicrofossils
SNFamily. Indexed with microfossils if applicable.
miomagmatic zone  search
USEmiogeosynclines
miospores  search
BTpalynomorphs
 .miospores
NTCicatricosisporites
 Classopollis
 Florinites
 Lycopodiumsporites
 Momipites
 Normapolles
 pollen
RTmicrofossils
 biostratigraphy
 Artemisia
 megaspores
 Cladophlebis
 Compositae
 spores
 Cyperaceae
 Dryas
 exine
 sporopollenin
 monolete taxa
SNIndexed with microfossils if applicable.
miptera  search
NTHeteroptera
 Homoptera
Mir Pipe  search
BTCommonwealth of Independent States
 .Russian Federation
 ..Yakutia Russian Federation
 ...Mir Pipe
RTSiberian Platform
 Vilyuy Syneclise
SNKimberlite pipe. This term has multiple hierarchies. Added to Thesaurus in 1989.
mirabilite  search
BTsulfates
 .mirabilite
Mirador Formation  search
BTChronostratigraphic Units
 .Phanerozoic
 ..Cenozoic
 ...Paleogene
 ....Eocene
 .....Mirador Formation
RTVenezuela
Miramichi Bay  search
BTCanada
 .Eastern Canada
 ..Maritime Provinces
 ...New Brunswick
 ....Miramichi Bay
RTGulf of Saint Lawrence
SNInlet of Gulf of Saint Lawrence. Also search Miramichi.
Miramichi earthquake 1982  search
BTearthquakes
 .Miramichi earthquake 1982
UFNew Brunswick earthquake 1982
RTCanada
 New Brunswick
SNEpicenter at Miramichi, New Brunswick, Canada. Added to Thesaurus in 1989.
Miranda Satellite  search
RTicy satellites
 satellites
 Uranus
 Voyager Program
SNOne of the satellites of Uranus. Before 1989, also search Miranda and Uranus. Added to Thesaurus in 1989.
Miranda Venezuela  search
BTSouth America
 .Venezuela
 ..Miranda Venezuela
SNState on the Caribbean Sea.
mires  search
NTbogs
 fens
 marshes
 peatlands
 swamps
RTecology
 fluvial features
 lacustrine features
 geomorphology
 palsas
 paludal environment
 paludal sedimentation
 peat
 shore features
 Sphagnum
 surface water
 wetlands
SNCollective geomorphic feature term for peat-forming environments. See environment or wetlands for paleoecology or ecology studies. Before 1998, also search bogs, marshes, swamps, and fens. Indexed with lacustrine features or shore features or fluvial feat
Mirgalimsay Kazakhstan  search
BTCommonwealth of Independent States
 .Kazakhstan
 ..Mirgalimsay Kazakhstan
SNVillage in S near Syr Darya River. This term has multiple hierarchies.
Mirny  search
USEMirnyy Station
Mirnyy Russian Federation  search
BTCommonwealth of Independent States
 .Russian Federation
 ..Mirnyy Russian Federation
RTYakutia Russian Federation
SNCity in Yakutia. May also occur in other locations. Before 1993, Mirnyy Russian Republic was also used. Indexed with region as applicable.
Mirnyy Station  search
BTAntarctica
 .Mirnyy Station
UFMirny
SNUSSR IGY station on Davis Sea near Shackleton Ice Shelf on the Indian Ocean side. Before 1981, also search (Mirnyy OR Mirny) AND Antarctica. Added to Thesaurus in 1981.
Mirror Lake  search
RTCarroll County New Hampshire
SNE central New Hampshire. Indexed with county or regions as applicable. Added to Thesaurus in 1989.
mirrorstone  search
USEmuscovite
Mirsk Poland  search
BTEurope
 .Central Europe
 ..Poland
 ...Mirsk Poland
RTPolish Sudeten Mountains
SNTown near Bohemia border in Jelenia Gora Province.
Mirzapur India  search
BTAsia
 .Indian Peninsula
 ..India
 ...Uttar Pradesh India
 ....Mirzapur India
SNCity in SE Uttar Pradesh, N central India.
miscellanea  search
UFincertae sedis
RTpaleontology
 fossils
 paleobotany
 problematic microfossils
 problematic fossils
 taxonomy
 classification
SNMay be used if fossil is not yet classified.
miscellaneous minerals  search
USEmineral inventory
miscibility gap  search
RTphase equilibria
Mishash Formation  search
BTChronostratigraphic Units
 .Phanerozoic
 ..Mesozoic
 ...Cretaceous
 ....Mishash Formation
RTIsrael
Misoa Formation  search
BTChronostratigraphic Units
 .Phanerozoic
 ..Cenozoic
 ...Paleogene
 ....Eocene
 .....lower Eocene
 ......Misoa Formation
RTVenezuela
SNNW Venezuela. Added to Thesaurus in 1989.
Mispec Group  search
BTChronostratigraphic Units
 .Phanerozoic
 ..Paleozoic
 ...Carboniferous
 ....Mispec Group
RTNew Brunswick
SNS New Brunswick. Overlain by Lancaster Formation. Added to Thesaurus in 1989.
Missaukee County Michigan  search
BTUnited States
 .Michigan
 ..Michigan Lower Peninsula
 ...Missaukee County Michigan
Missi Group  search
BTChronostratigraphic Units
 .Precambrian
 ..Missi Group
RTCanada
 Saskatchewan
 Manitoba
SNIts basal unit is normally composed of a conglomerate consisting of angular to subrounded boulders or pebbles along with minor amounts of chert, jasper and quartz. The unit grades upwards to graywacke and subgraywacke with thin beds of conglomerate. In th
Mission Canyon Limestone  search
BTChronostratigraphic Units
 .Phanerozoic
 ..Paleozoic
 ...Carboniferous
 ....Mississippian
 .....Mission Canyon Limestone
RTIdaho
 Utah
 Montana
 North Dakota
 Madison Group
SNIn Madison Group. Added to Thesaurus in 1985.
Mission Creek Fault  search
BTUnited States
 .California
 ..Riverside County California
 ...Mission Creek Fault
SNS California. Added to Thesaurus in 1989.
Mission Valley Formation  search
BTChronostratigraphic Units
 .Phanerozoic
 ..Cenozoic
 ...Paleogene
 ....Eocene
 .....upper Eocene
 ......Mission Valley Formation
RTCalifornia
SNS California. Added to Thesaurus in 1985.
Missisquoi County Quebec  search
BTCanada
 .Eastern Canada
 ..Quebec
 ...Missisquoi County Quebec
Mississippi  search
BTUnited States
 .Mississippi
NTAdams County Mississippi
 Alcorn County Mississippi
 Amite County Mississippi
 Attala County Mississippi
 Benton County Mississippi
 Bolivar County Mississippi
 Calhoun County Mississippi
 Carroll County Mississippi
 Chickasaw County Mississippi
 Choctaw County Mississippi
 Claiborne County Mississippi
 Clarke County Mississippi
 Clay County Mississippi
 Coahoma County Mississippi
 Copiah County Mississippi
 Covington County Mississippi
 De Soto County Mississippi
 Forrest County Mississippi
 Franklin County Mississippi
 George County Mississippi
 Greene County Mississippi
 Grenada County Mississippi
 Hancock County Mississippi
 Harrison County Mississippi
 Hinds County Mississippi
 Holmes County Mississippi
 Humphreys County Mississippi
 Issaquena County Mississippi
 Itawamba County Mississippi
 Jackson County Mississippi
 Jasper County Mississippi
 Jefferson County Mississippi
 Jefferson Davis County Mississippi
 Jones County Mississippi
 Kemper County Mississippi
 Lafayette County Mississippi
 Lamar County Mississippi
 Lauderdale County Mississippi
 Lawrence County Mississippi
 Leake County Mississippi
 Lee County Mississippi
 Leflore County Mississippi
 Lincoln County Mississippi
 Lowndes County Mississippi
 Madison County Mississippi
 Marion County Mississippi
 Marshall County Mississippi
 Monroe County Mississippi
 Montgomery County Mississippi
 Neshoba County Mississippi
 Newton County Mississippi
 Noxubee County Mississippi
 Oktibbeha County Mississippi
 Panola County Mississippi
 Pascagoula River basin
 Pearl River County Mississippi
 Perry County Mississippi
 Pike County Mississippi
 Pontotoc County Mississippi
 Prentiss County Mississippi
 Quitman County Mississippi
 Rankin County Mississippi
 Richton Dome
 Scott County Mississippi
 Sharkey County Mississippi
 Simpson County Mississippi
 Smith County Mississippi
 Stone County Mississippi
 Sunflower County Mississippi
 Tallahatchie County Mississippi
 Tate County Mississippi
 Tippah County Mississippi
 Tishomingo County Mississippi
 Tunica County Mississippi
 Union County Mississippi
 Walthall County Mississippi
 Warren County Mississippi
 Washington County Mississippi
 Wayne County Mississippi
 Webster County Mississippi
 Wilkinson County Mississippi
 Winston County Mississippi
 Yalobusha County Mississippi
 Yazoo County Mississippi
RTBlack Warrior Basin
 Bluffport Marl Member
 Bucatunna Formation
 Byram Formation
 Catahoula Formation
 Chattanooga Shale
 Amite River
 Arkansas River
 Buckner Formation
 Claiborne Group
 Chickasawhay Formation
 Citronelle Formation
 Clayton Formation
 Cockfield Format
Mississippi Canyon  search
BTAtlantic Ocean
 .North Atlantic
 ..Gulf of Mexico
 ...Mississippi Canyon
RTLouisiana
 submarine canyons
SNSubmarine canyon offshore Louisiana in the N Gulf of Mexico. Added to Thesaurus in 1995.
Mississippi County Arkansas  search
BTUnited States
 .Arkansas
 ..Mississippi County Arkansas
Mississippi County Missouri  search
BTUnited States
 .Missouri
 ..Mississippi County Missouri
Mississippi Delta  search
BTUnited States
 .Louisiana
 ..Mississippi Delta
UFMississippi River delta
RTAvery Island
 Mississippi Fan
 East Bay
 Mississippi River
 South Pass
SNOn Gulf of Mexico 100 miles SE of New Orleans.
Mississippi Embayment  search
BTUnited States
 .Mississippi Embayment
RTKentucky
 Missouri
 Illinois
 Mississippi
 Alabama
 Tennessee
 Arkansas
 Gulf Coastal Plain
 Mississippi Valley
 New Madrid earthquakes 1811-1812
 New Madrid region
SNA geosynclinal area including a section of the U S Gulf Coast and extending northward up the Mississippi Valley. Indexed with states as applicable.
Mississippi Fan  search
BTAtlantic Ocean
 .North Atlantic
 ..Gulf of Mexico
 ...Mississippi Fan
RTMississippi Delta
 Sigsbee Deep
 DSDP Site 614
 Leg 96
 DSDP Site 615
 DSDP Site 616
 DSDP Site 617
 DSDP Site 620
 DSDP Site 621
 DSDP Site 622
 DSDP Site 623
 DSDP Site 624
 Mississippi River
 Mississippi River basin
SNIn Gulf of Mexico, extending from the Mississippi Delta to Sigsbee Deep and Florida abyssal plain. Added to Thesaurus in 1989.
Mississippi River  search
BTUnited States
 .Mississippi River
RTLouisiana
 Iowa
 Kentucky
 Missouri
 Illinois
 Mississippi
 Wisconsin
 Minnesota
 Tennessee
 Arkansas
 Mississippi Delta
 Mississippi Fan
 Mississippi Valley
 Mississippi River basin
SNRises in Lake Itasca in NW Minnesota and flows SE and S into the Gulf of Mexico. Indexed with states as applicable.
Mississippi River basin  search
BTNorth America
 .Mississippi River basin
RTCanada
 United States
 Mississippi Fan
 Mississippi River
 Ohio River basin
SNDrainage basin including the Ohio and Missouri river systems comprises 2/5 of the total U.S. area covering all or parts of 31 states plus S Alberta and Saskatchewan. It drains much of the interior lowlands, Great Plains, central Gulf Coastal Plain, a port
Mississippi River delta  search
USEMississippi Delta
Mississippi River valley  search
USEMississippi Valley
Mississippi Sound  search
BTUnited States
 .Mississippi Sound
RTMississippi
 Alabama
 Gulf of Mexico
 Gulf Coastal Plain
 Mobile Bay
 Hancock County Mississippi
 Harrison County Mississippi
 Jackson County Mississippi
 Mobile County Alabama
SNArm of Gulf of Mexico, off Mississippi and Alabama. Indexed with states as applicable. Added to Thesaurus in 1985.
Mississippi Valley  search
BTUnited States
 .Mississippi Valley
NTLower Mississippi Valley
 Upper Mississippi Valley
UFMississippi River valley
RTLouisiana
 Iowa
 Kentucky
 Missouri
 Illinois
 Mississippi
 Wisconsin
 Minnesota
 Tennessee
 Arkansas
 Midwest
 Mississippi Embayment
 Reelfoot Rift
 Mississippi River
 Southern U.S.
SNRiver valley. Indexed with states as applicable.
mississippi valley type deposits  search
USEmississippi valley-type deposits
mississippi valley-type deposits  search
UFmississippi valley type deposits
 MVT-type deposits
RTlead-zinc deposits
 zinc ores
 mineral deposits, genesis
 Gays River Deposit
 lead ores
 Pine Point mining district
Mississippian  search
BTChronostratigraphic Units
 .Phanerozoic
 ..Paleozoic
 ...Carboniferous
 ....Mississippian
NTTournaisian
 Visean
 Serpukhovian
 Barnett Formation
 Bear Gulch Limestone Member
 Big Injun Sandstone
 Boone Formation
 Borden Group
 Chainman Shale
 Charles Formation
 Harrodsburg Limestone
 Leadville Formation
 Logan Formation
 Lower Mississippian
 Madison Group
 Middle Mississippian
 Mission Canyon Limestone
 Monte Cristo Limestone
 Newman Limestone
 Price Formation
 Ramp Creek Formation
 Rampart Group
 Redwall Limestone
 Stanley Group
 Sunbury Shale
 Upper Mississippian
 Valmeyeran
 Windsor Group
RTPennsylvanian
 Antler Orogeny
 Dinantian
 Chattanooga Shale
 Amsden Formation
 Arkansas Novaculite
 Bartlesville Sand
 Bedford Shale
 Berea Sandstone
 Earn Group
 Endicott Group
 Exshaw Formation
 Johns Valley Formation
 Kaskaskia Sequence
 Rundle Group
 Saint George Ba
SNAfter the Devonian and before the Pennsylvanian. Approximate equivalent of Lower Carboniferous of European usage.
Missoula County Montana  search
BTUnited States
 .Montana
 ..Missoula County Montana
RTSelway-Bitterroot Wilderness
SNW Montana.
Missoula Group  search
BTChronostratigraphic Units
 .Precambrian
 ..Proterozoic
 ...Mesoproterozoic
 ....Missoula Group
RTIdaho
 Montana
 Belt Supergroup
 Bonner Formation
 Empire Formation
 Mount Shields Formation
 Shepard Formation
 Snowslip Formation
 Spokane Formation
SNIn Belt Supergroup. Includes numerous named formations: among these are Marsh Shale in Helena region; Striped Peak and Libby formations in NW Montana, five formations near Missoula, and others in and S of Glacier National Park. In N Idaho and NW Montana.
Missouri  search
BTUnited States
 .Missouri
NTAdair County Missouri
 Andrew County Missouri
 Atchison County Missouri
 Audrain County Missouri
 Barry County Missouri
 Barton County Missouri
 Bates County Missouri
 Benton County Missouri
 Bollinger County Missouri
 Boone County Missouri
 Buchanan County Missouri
 Butler County Missouri
 Caldwell County Missouri
 Callaway County Missouri
 Camden County Missouri
 Cape Girardeau County Missouri
 Carroll County Missouri
 Carter County Missouri
 Cass County Missouri
 Cedar County Missouri
 Chariton County Missouri
 Christian County Missouri
 Clark County Missouri
 Clay County Missouri
 Clinton County Missouri
 Cole County Missouri
 Cooper County Missouri
 Crawford County Missouri
 Dade County Missouri
 Dallas County Missouri
 Daviess County Missouri
 De Kalb County Missouri
 Dent County Missouri
 Douglas County Missouri
 Dunklin County Missouri
 Franklin County Missouri
 Gasconade County Missouri
 Gentry County Missouri
 Greene County Missouri
 Grundy County Missouri
 Harrison County Missouri
 Henry County Missouri
 Hickory County Missouri
 Holt County Missouri
 Howard County Missouri
 Howell County Missouri
 Iron County Missouri
 Jackson County Missouri
 Jasper County Missouri
 Jefferson County Missouri
 Johnson County Missouri
 Joplin Missouri
 Kansas City Missouri
 Knox County Missouri
 Laclede County Missouri
 Lafayette County Missouri
 Lawrence County Missouri
 Lewis County Missouri
 Lincoln County Missouri
 Linn County Missouri
 Livingston County Missouri
 Macon County Missouri
 Madison County Missouri
 Maries County Missouri
 Marion County Missouri
 McDonald County Missouri
 Mercer County Missouri
 Miller County Missouri
 Mississippi County Missouri
 Moniteau County Missouri
 Monroe County Missouri
 Montgomery County Missouri
 Morgan County Missouri
 New Madrid County Missouri
 Newton County Missouri
 Nodaway County Missouri
 Oregon County Missouri
 Osage County Missouri
 Ozark County Missouri
 Pemiscot County Missouri
 Perry County Missouri
 Pettis County Missouri
 Phelps County Missouri
 Pike County Missouri
 Platte County Missouri
 Polk County Missouri
 Pulaski County Missouri
 Putnam County Missouri
 Ralls County Missouri
 Randolph County Missouri
 Ray County Missouri
 Reynolds County Missouri
 Ripley County Missouri
 Saint Charles County Missouri
 Saint Clair County Missouri
 Saint Francois County Missouri
 Saint Francois Mountains
 Saint Louis County Missouri
 Sainte Genevieve County Missouri
 Saline County Missouri
 Schuyler County Missouri
 Scotland County Missouri
 Scott County Missouri
 Shannon County Missouri
 Shelby County Missouri
 Stoddard County Missouri
 Stone County Missouri
 Sullivan County Missouri
 Taney County Missouri
 Texas County Missouri
 Vernon County Missouri
 Viburnum Trend
 Warren County Missouri
 Washington County Missouri
 Wayne County Missouri
 Webster County Missouri
 Worth County Missouri
 Wright County Missouri
RTAux Vases Sandstone
 Bainbridge Formation
 Blackwater River
 Bonneterre Formation
 Boone Formatio
Missouri Plateau  search
BTUnited States
 .Missouri Plateau
RTMontana
 North Dakota
 South Dakota
 Great Plains
SNN Great Plains. Indexed with states as applicable. Added to Thesaurus in 1985.
Missouri River  search
BTUnited States
 .Missouri River
RTMontana
 Iowa
 Missouri
 Nebraska
 North Dakota
 Kansas
 South Dakota
 Missouri River basin
 Missouri River valley
SNRises in S Montana and flows E and SE to join the Mississippi River N of Saint Louis. Indexed with states as applicable.
Missouri River basin  search
BTNorth America
 .Missouri River basin
RTAlberta
 Canada
 Saskatchewan
 United States
 Wyoming
 Montana
 Iowa
 Missouri
 Colorado
 Nebraska
 North Dakota
 Kansas
 South Dakota
 Missouri River
SNDrainage basin. Indexed with states and provinces as applicable.
Missouri River valley  search
BTUnited States
 .Missouri River valley
RTMontana
 Iowa
 Missouri
 Nebraska
 North Dakota
 Kansas
 South Dakota
 Missouri River
SNIndexed with states as applicable.
Missourian  search
BTChronostratigraphic Units
 .Phanerozoic
 ..Paleozoic
 ...Carboniferous
 ....Pennsylvanian
 .....Upper Pennsylvanian
 ......Missourian
NTKansas City Group
 Lansing Group
 Plattsburg Limestone
 Pleasanton Group
 Rock Lake Shale Member
 Seminole Formation
 Stanton Formation
 Wann Formation
 Wyandotte Limestone
UFMissourian Series
SNProvincial series, North America: lower Upper Pennsylvanian, above Desmoinesian, below Virgilian.
Missourian Series  search
USEMissourian
Mist Mountain Formation  search
BTChronostratigraphic Units
 .Phanerozoic
 ..Mesozoic
 ...Mist Mountain Formation
RTJurassic
 Cretaceous
 Alberta
 British Columbia
 Kootenay Formation
SNIn Kootenay Formation. Indexed with ages as applicable. Added to Thesaurus in 1989.
Mistastin Lake  search
BTCanada
 .Eastern Canada
 ..Newfoundland
 ...Labrador
 ....Mistastin Lake
SNN Labrador.
Mitchell County Georgia  search
BTUnited States
 .Georgia
 ..Mitchell County Georgia
SNSW Georgia.
Mitchell County Iowa  search
BTUnited States
 .Iowa
 ..Mitchell County Iowa
SNN Iowa.
Mitchell County Kansas  search
BTUnited States
 .Kansas
 ..Mitchell County Kansas
SNN Kansas.
Mitchell County North Carolina  search
BTUnited States
 .North Carolina
 ..Mitchell County North Carolina
SNW North Carolina.
Mitchell County Texas  search
BTUnited States
 .Texas
 ..Mitchell County Texas
SNW Texas.
mitigation  search
RTenvironmental analysis
 environmental effects
 geologic hazards
 planning
 preventive measures
 reclamation
 remediation
 waste disposal
SNA variety of measures taken to prevent or reduce the undesirable environmental effects of human activity. May be used in a broad sense to include preventive, remedial, or reclamation measures as well as substitution of alternative measures. For geologic h
Mitsuishi Japan  search
BTAsia
 .Far East
 ..Japan
 ...Mitsuishi Japan
UFMituisi Japan
RTHonshu
 Okayama Japan
 Hokkaido
SNTown in Okayama Prefecture, SW Honshu. Also town in S Hokkaido. Indexed with prefecture as applicable.
Mitterberg Austria  search
BTEurope
 .Central Europe
 ..Austria
 ...Salzburg State Austria
 ....Mitterberg Austria
SNVillage in Salzburg State, W central Austria.
Mituisi Japan  search
USEMitsuishi Japan
Miura Peninsula  search
BTnshu
 .Miura Peninsula
RTKazusa Group
 Kanagawa Japan
SNSE Honshu. Extends into Sagami Sea S of Yokohama and Tokyo Bay.
mixed crystals  search
USEsolid solution
mixed-layer minerals  search
RTclay minerals
 mineral interlayer
 minerals
SNBefore 1978, search clay minerals AND mixed-layer.
mixing  search
RTimmiscibility
 processes
 restites
 separation
SNUsed as a general term.
mixite  search
BTarsenites
 .mixite
mixtite  search
USEdiamictite
Miyagi earthquake 1978  search
BTearthquakes
 .Miyagi earthquake 1978
UFMiyagi-ken-oki earthquake, 1978
 Miyagiken-oki earthquake, 1978
RTMiyagi Japan
 Honshu
 Japan
SNEpicenter in Miyagi, NE Honshu. Added to Thesaurus in 1989.
Miyagi Japan  search
BTnshu
 .Miyagi Japan
NTHosokura Mine
 Oshika Peninsula
 Sendai Japan
RTAbukuma Mountains
 Tohoku
 Miyagi earthquake 1978
 Zao
SNPrefecture in N Honshu.
Miyagi-ken-oki earthquake, 1978  search
USEMiyagi earthquake 1978
Miyagiken-oki earthquake, 1978  search
USEMiyagi earthquake 1978
Miyake-Jima  search
BTnshu
 .Izu-shichito
 ..Miyake-Jima
UFMiyaki Island
 Miyaki-Jima Island
RTvolcanoes
SNIsland of Izu-shichito group in Greater Tokyo, S of O-shima Island and Sagami Sea. Active volcano on island.
Miyaki Island  search
USEMiyake-Jima
Miyaki-Jima Island  search
USEMiyake-Jima
Miyazaki Japan  search
BTAsia
 .Far East
 ..Japan
 ...Kyushu
 ....Miyazaki Japan
NTEbino Japan
RTKirishima
SNCity and prefecture in SE Kyushu.
Miye Japan  search
USEMie Japan
Mizunami Group  search
BTChronostratigraphic Units
 .Phanerozoic
 ..Cenozoic
 ...Neogene
 ....Miocene
 .....Mizunami Group
RTHonshu
 Japan
 Mizunami Japan
SNCentral Honshu, Japan. Added to Thesaurus in 1985.
Mizunami Japan  search
BTnshu
 .Gifu Japan
 ..Mizunami Japan
RTHiyoshi Japan
 Mizunami Group
SNTown in central Honshu.
Mizusawa Japan  search
BTnshu
 .Iwate Japan
 ..Mizusawa Japan
SNTown in N Honshu.