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NARROW
Format
Article Type
Journal
Publisher
Section
GeoRef Subject
-
all geography including DSDP/ODP Sites and Legs
-
Africa
-
Congo Craton (1)
-
East Africa
-
Zambia (1)
-
-
North Africa
-
Libya (1)
-
-
Southern Africa
-
South Africa
-
Bushveld Complex (1)
-
Transvaal region (2)
-
Witwatersrand (1)
-
-
Zimbabwe (1)
-
-
West Africa
-
Cameroon (1)
-
-
-
Asia
-
Arabian Peninsula
-
Saudi Arabia (1)
-
-
-
Australasia
-
Australia
-
Western Australia
-
Yilgarn Craton (1)
-
-
-
New Zealand (1)
-
-
Avalon Zone (1)
-
Canada
-
Eastern Canada
-
Ontario
-
Algoma District Ontario
-
Mamainse Point (1)
-
-
Bruce County Ontario (1)
-
Essex County Ontario (1)
-
Manitoulin District Ontario
-
Manitoulin Island (3)
-
-
Michipicoten Island (1)
-
Moose River basin (1)
-
Russell County Ontario (1)
-
Simcoe County Ontario
-
Borden Ontario (1)
-
-
Sudbury Structure (1)
-
-
Ottawa Valley (1)
-
-
Western Canada
-
Alberta
-
Alberta Basin (2)
-
Peace River Arch (1)
-
-
Northwest Territories (2)
-
Saskatchewan (1)
-
-
-
Commonwealth of Independent States
-
Belarus
-
Zhitkovichi Belarus (1)
-
-
-
Europe
-
Alps
-
Central Alps
-
Bernese Alps (1)
-
-
-
Baltic region
-
Estonia (1)
-
-
Belarus
-
Zhitkovichi Belarus (1)
-
-
Central Europe
-
Austria (1)
-
Germany (2)
-
Poland (1)
-
Switzerland
-
Bernese Alps (1)
-
-
-
Southern Europe
-
Iberian Peninsula
-
Portugal (2)
-
-
-
Western Europe
-
France (1)
-
United Kingdom
-
Great Britain
-
England
-
Devon England (1)
-
-
Scotland
-
Edinburgh Scotland (1)
-
Midlothian Scotland (1)
-
-
-
-
-
-
Lake Nipissing (4)
-
Lake Saint Clair (1)
-
Mexico
-
Sierra Madre Oriental (1)
-
Zacatecas Mexico (1)
-
-
Middle Valley (1)
-
North America
-
Appalachian Basin (6)
-
Appalachians
-
Central Appalachians (1)
-
-
Canadian Shield
-
Southern Province (3)
-
Superior Province (2)
-
-
Detroit River (3)
-
Great Lakes
-
Lake Erie (1)
-
Lake Huron (4)
-
Lake Michigan (26)
-
Lake Superior (14)
-
-
Great Lakes region (60)
-
Great Plains
-
Northern Great Plains (1)
-
Southern Great Plains (1)
-
-
Grenville Front (1)
-
Keweenawan Rift (16)
-
Lake Superior region (32)
-
Michigan Basin (112)
-
Niagara Escarpment (1)
-
Niagara River (1)
-
Williston Basin (1)
-
-
Oceania
-
Melanesia
-
New Caledonia (1)
-
-
-
Pacific Ocean
-
East Pacific
-
Northeast Pacific
-
Juan de Fuca Ridge (1)
-
-
-
North Pacific
-
Northeast Pacific
-
Juan de Fuca Ridge (1)
-
-
-
-
Plum Island (1)
-
San Juan Basin (1)
-
Searles Lake (1)
-
Silver Lake (1)
-
South America
-
Brazil
-
Minas Gerais Brazil
-
Quadrilatero Ferrifero (2)
-
-
-
-
United States
-
Alaska
-
Brooks Range (1)
-
-
Arizona
-
Pima County Arizona
-
Tucson Arizona (1)
-
-
Yuma County Arizona (1)
-
-
Arkansas (2)
-
California
-
San Joaquin Valley (1)
-
Santa Clara County California
-
San Jose California (1)
-
-
-
Carolina Bays (1)
-
Cincinnati Arch (1)
-
Colorado
-
Lake County Colorado
-
Leadville mining district (1)
-
-
-
Colorado Plateau (1)
-
Connecticut (2)
-
Eastern U.S. (3)
-
Florida (1)
-
Georgia (1)
-
Illinois (20)
-
Illinois Basin (9)
-
Indiana
-
Blackford County Indiana (1)
-
Howard County Indiana (1)
-
Jackson County Indiana (1)
-
Porter County Indiana (1)
-
Steuben County Indiana (1)
-
-
Iowa (4)
-
Kansas
-
Douglas County Kansas (1)
-
Meade County Kansas (1)
-
Reno County Kansas
-
Hutchinson Kansas (1)
-
-
-
Kentucky (8)
-
Louisiana (1)
-
Maryland
-
Anne Arundel County Maryland (1)
-
-
Massachusetts (4)
-
Michigan
-
Michigan Lower Peninsula
-
Alcona County Michigan (1)
-
Allegan County Michigan (10)
-
Alpena County Michigan (8)
-
Antrim County Michigan (1)
-
Arenac County Michigan (5)
-
Barry County Michigan (1)
-
Bay County Michigan (7)
-
Benzie County Michigan (1)
-
Berrien County Michigan (7)
-
Branch County Michigan (1)
-
Calhoun County Michigan (2)
-
Cass County Michigan (1)
-
Charlevoix County Michigan (3)
-
Cheboygan County Michigan (6)
-
Clare County Michigan (1)
-
Clinton County Michigan (1)
-
Crawford County Michigan (1)
-
Eaton County Michigan (6)
-
Emmet County Michigan (7)
-
Gladwin County Michigan (4)
-
Grand Traverse County Michigan (3)
-
Gratiot County Michigan (1)
-
Huron County Michigan (1)
-
Ingham County Michigan (3)
-
Ionia County Michigan (5)
-
Iosco County Michigan (2)
-
Isabella County Michigan (1)
-
Jackson County Michigan (1)
-
Kalamazoo County Michigan (3)
-
Kalkaska County Michigan (1)
-
Kent County Michigan (2)
-
Lake County Michigan (1)
-
Lansing Michigan (1)
-
Lapeer County Michigan (1)
-
Leelanau County Michigan (1)
-
Livingston County Michigan (3)
-
Macomb County Michigan (5)
-
Manistee County Michigan (4)
-
Mecosta County Michigan (1)
-
Midland County Michigan (4)
-
Missaukee County Michigan (1)
-
Montcalm County Michigan (2)
-
Montmorency County Michigan (2)
-
Muskegon County Michigan (4)
-
Oakland County Michigan (1)
-
Ogemaw County Michigan (2)
-
Osceola County Michigan (1)
-
Oscoda County Michigan (3)
-
Otsego County Michigan (4)
-
Ottawa County Michigan (6)
-
Presque Isle County Michigan (5)
-
Roscommon County Michigan (1)
-
Saginaw County Michigan (4)
-
Saint Clair County Michigan (4)
-
Sanilac County Michigan (2)
-
Tuscola County Michigan (2)
-
Van Buren County Michigan (4)
-
Washtenaw County Michigan
-
Ann Arbor Michigan (2)
-
-
Wayne County Michigan (4)
-
-
Michigan Upper Peninsula
-
Alger County Michigan (4)
-
Baraga County Michigan (6)
-
Chippewa County Michigan
-
Sault Sainte Marie Michigan (1)
-
-
Delta County Michigan (6)
-
Dickinson County Michigan (4)
-
Gogebic County Michigan (14)
-
Houghton County Michigan (11)
-
Iron County Michigan (4)
-
Keweenaw County Michigan
-
Isle Royale National Park (1)
-
-
Keweenaw Peninsula (28)
-
Luce County Michigan (3)
-
Mackinac County Michigan (6)
-
Marquette County Michigan
-
Marquette Michigan (4)
-
Marquette Range (8)
-
-
Menominee County Michigan (3)
-
Ontonagon County Michigan
-
White Pine Michigan (14)
-
-
Schoolcraft County Michigan (6)
-
-
-
Midcontinent (8)
-
Midcontinent geophysical anomaly (2)
-
Midwest (7)
-
Minnesota
-
Cook County Minnesota (2)
-
Dakota County Minnesota (1)
-
Mesabi Range (2)
-
Minnesota River valley (1)
-
Vermilion Range (1)
-
-
Mississippi Valley (1)
-
Missouri
-
Viburnum Trend (1)
-
-
Montana (4)
-
Nebraska (2)
-
Nevada (1)
-
New England (2)
-
New Hampshire (2)
-
New Mexico (1)
-
New York
-
Erie County New York (2)
-
Livingston County New York (1)
-
Niagara County New York (1)
-
Schoharie County New York (1)
-
-
Ohio
-
Paulding County Ohio (1)
-
-
Oklahoma (2)
-
Oregon (1)
-
Pennsylvania
-
Berks County Pennsylvania (1)
-
-
Powder River basin (1)
-
Tennessee (3)
-
Texas (5)
-
Utah (2)
-
Virginia
-
Wythe County Virginia (1)
-
-
Washington
-
Hanford Site (1)
-
-
West Virginia (4)
-
Wisconsin
-
Ashland County Wisconsin (2)
-
Columbia County Wisconsin (1)
-
Dane County Wisconsin (1)
-
Dodge County Wisconsin (1)
-
Florence County Wisconsin (2)
-
Grant County Wisconsin (1)
-
Iron County Wisconsin (1)
-
Marinette County Wisconsin (1)
-
Milwaukee County Wisconsin
-
Milwaukee Wisconsin (1)
-
-
Sawyer County Wisconsin (1)
-
-
Wyoming (1)
-
-
USSR (1)
-
White Pine Mine (16)
-
-
commodities
-
aggregate (1)
-
bitumens (4)
-
brines (16)
-
construction materials
-
building stone (2)
-
-
diamond deposits (2)
-
dolostone deposits (1)
-
energy sources (19)
-
gypsum deposits (1)
-
industrial minerals (1)
-
limestone deposits (2)
-
metal ores
-
base metals (1)
-
cadmium ores (1)
-
chromite ores (1)
-
copper ores (42)
-
gold ores (3)
-
iron ores (19)
-
lead ores (2)
-
lead-zinc deposits (2)
-
manganese ores (1)
-
nickel ores (3)
-
platinum ores (1)
-
polymetallic ores (1)
-
pyrite ores (1)
-
rare earth deposits (1)
-
silver ores (3)
-
uranium ores (1)
-
zinc ores (2)
-
-
mineral deposits, genesis (80)
-
mineral exploration (8)
-
mineral resources (4)
-
oil and gas fields (33)
-
petroleum
-
natural gas
-
coalbed methane (2)
-
-
-
salt deposits (1)
-
talc deposits (1)
-
water resources (4)
-
-
elements, isotopes
-
carbon
-
C-13/C-12 (16)
-
C-14 (14)
-
organic carbon (2)
-
-
chemical ratios (1)
-
halogens
-
bromine
-
bromide ion (1)
-
-
chlorine
-
chloride ion (2)
-
-
-
hydrogen
-
D/H (3)
-
deuterium (3)
-
-
isotope ratios (22)
-
isotopes
-
radioactive isotopes
-
Be-7 (1)
-
C-14 (14)
-
Cs-137 (1)
-
Pb-206/Pb-204 (2)
-
Pb-207/Pb-204 (1)
-
Pb-208/Pb-204 (2)
-
Pb-210 (1)
-
-
stable isotopes
-
C-13/C-12 (16)
-
D/H (3)
-
deuterium (3)
-
Nd-144/Nd-143 (1)
-
O-18/O-16 (12)
-
Pb-206/Pb-204 (2)
-
Pb-207/Pb-204 (1)
-
Pb-208/Pb-204 (2)
-
S-33/S-32 (1)
-
S-34/S-32 (8)
-
Sr-87/Sr-86 (6)
-
-
-
metals
-
actinides
-
thorium (1)
-
uranium (1)
-
-
alkali metals
-
cesium
-
Cs-137 (1)
-
-
potassium (2)
-
-
alkaline earth metals
-
beryllium
-
Be-7 (1)
-
-
magnesium (1)
-
strontium
-
Sr-87/Sr-86 (6)
-
-
-
aluminum (1)
-
arsenic (2)
-
chromium (1)
-
copper (40)
-
gold (1)
-
iron
-
ferric iron (1)
-
-
lead
-
Pb-206/Pb-204 (2)
-
Pb-207/Pb-204 (1)
-
Pb-208/Pb-204 (2)
-
Pb-210 (1)
-
-
manganese (2)
-
mercury (1)
-
molybdenum (1)
-
nickel (2)
-
platinum group
-
iridium (1)
-
platinum ores (1)
-
rhodium (1)
-
-
rare earths
-
neodymium
-
Nd-144/Nd-143 (1)
-
-
samarium (1)
-
-
silver (2)
-
zinc (2)
-
-
nitrogen (1)
-
oxygen
-
O-18/O-16 (12)
-
-
phosphorus (1)
-
silicon (1)
-
sulfur
-
S-33/S-32 (1)
-
S-34/S-32 (8)
-
-
trace metals (2)
-
-
fossils
-
bacteria
-
coliform bacteria
-
Escherichia
-
Escherichia coli (1)
-
-
-
-
borings (3)
-
burrows (2)
-
Chordata
-
Vertebrata
-
Pisces (1)
-
Tetrapoda
-
Mammalia
-
Theria
-
Eutheria
-
Proboscidea
-
Mastodontoidea (4)
-
-
-
-
-
Reptilia
-
Anapsida
-
Testudines
-
Cryptodira (1)
-
Emydidae (1)
-
-
-
-
-
Thelodonti (1)
-
-
-
eukaryotes (2)
-
fungi (1)
-
Graptolithina (3)
-
Hemichordata (1)
-
ichnofossils (3)
-
Invertebrata
-
Arthropoda
-
Chelicerata
-
Merostomata
-
Eurypterida (1)
-
-
-
Mandibulata
-
Crustacea
-
Ostracoda (7)
-
-
-
Trilobitomorpha
-
Trilobita (3)
-
-
-
Brachiopoda
-
Articulata
-
Pentamerida (1)
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Spiriferida (4)
-
-
-
Bryozoa
-
Trepostomata (1)
-
-
Cnidaria
-
Anthozoa
-
Zoantharia
-
Rugosa (2)
-
Tabulata (1)
-
-
-
Hydrozoa (1)
-
-
Echinodermata
-
Crinozoa
-
Crinoidea (5)
-
Cystoidea (1)
-
-
Echinozoa
-
Edrioasteroidea (1)
-
-
-
Mollusca
-
Bivalvia (1)
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Cephalopoda
-
Nautiloidea (1)
-
-
Gastropoda (5)
-
Rostroconchia (1)
-
Tentaculitida (2)
-
-
Porifera
-
Demospongea (1)
-
Stromatoporoidea (9)
-
-
Protista
-
Foraminifera (1)
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Radiolaria (1)
-
-
Vermes
-
Annelida (2)
-
-
-
microfossils
-
Chitinozoa (2)
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Conodonta
-
Icriodus (1)
-
-
-
palynomorphs
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acritarchs (2)
-
Chitinozoa (2)
-
miospores
-
pollen (7)
-
-
-
Plantae
-
algae
-
Chlorophyta
-
Chlorophyceae
-
Dasycladaceae (1)
-
-
-
-
Bryophyta (2)
-
-
problematic fossils (3)
-
thallophytes (5)
-
-
geochronology methods
-
(U-Th)/He (1)
-
Ar/Ar (1)
-
fission-track dating (1)
-
He/He (1)
-
K/Ar (2)
-
optically stimulated luminescence (5)
-
paleomagnetism (18)
-
Pb/Pb (4)
-
Rb/Sr (7)
-
Re/Os (2)
-
Sm/Nd (2)
-
tephrochronology (1)
-
thermochronology (1)
-
U/Pb (12)
-
U/Th/Pb (2)
-
-
geologic age
-
Cenozoic
-
Quaternary
-
Holocene
-
lower Holocene (4)
-
middle Holocene (1)
-
upper Holocene (4)
-
-
Pleistocene
-
Lake Algonquin (2)
-
Lake Chicago (2)
-
Lake Maumee (1)
-
middle Pleistocene (1)
-
upper Pleistocene
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Twocreekan (1)
-
Weichselian
-
upper Weichselian
-
Younger Dryas (2)
-
-
-
Wisconsinan
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Woodfordian (1)
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-
-
-
-
Tertiary
-
Neogene
-
Miocene (1)
-
-
-
-
Laurentide ice sheet (5)
-
Mesozoic
-
Cretaceous
-
Upper Cretaceous
-
Belle Fourche Shale (1)
-
Belly River Formation (1)
-
Carlile Shale (1)
-
Eagle Sandstone (1)
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Fruitland Formation (1)
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Greenhorn Limestone (1)
-
Judith River Formation (1)
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Milk River Formation (1)
-
-
-
Jurassic
-
Middle Jurassic (1)
-
Upper Jurassic
-
Smackover Formation (1)
-
-
-
-
MIS 2 (1)
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Paleozoic
-
Bedford Shale (1)
-
Berea Sandstone (2)
-
Cambrian
-
Upper Cambrian
-
Eau Claire Formation (2)
-
Franconia Formation (2)
-
Galesville Sandstone (3)
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Mount Simon Sandstone (3)
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Trempealeauan (1)
-
-
-
Carboniferous
-
Lower Carboniferous
-
Dinantian (1)
-
-
Mississippian
-
Lower Mississippian
-
Kinderhookian (1)
-
Osagian (2)
-
Tournaisian (1)
-
-
Sunbury Shale (1)
-
Upper Mississippian
-
Chesterian (1)
-
Meramecian
-
Sainte Genevieve Limestone (1)
-
-
-
-
Pennsylvanian
-
Lower Pennsylvanian (1)
-
Middle Pennsylvanian
-
Atokan (2)
-
-
Saginaw Formation (3)
-
Upper Pennsylvanian (1)
-
-
-
Devonian
-
Cedar City Formation (1)
-
Lower Devonian
-
Oriskany Sandstone (1)
-
-
Middle Devonian
-
Columbus Limestone (2)
-
Delaware Limestone (2)
-
Detroit River Group (5)
-
Dundee Limestone (8)
-
Eifelian (1)
-
Givetian (7)
-
Hamilton Group (3)
-
Ludlowville Formation (1)
-
Marcellus Shale (1)
-
Moscow Formation (1)
-
Onondaga Limestone (2)
-
Sylvania Formation (2)
-
Tioga Bentonite (1)
-
-
Traverse Group (18)
-
Upper Devonian
-
Cleveland Member (1)
-
Famennian
-
Wabamun Group (1)
-
-
Huron Member (1)
-
Nisku Formation (1)
-
Ohio Shale (2)
-
-
-
lower Paleozoic
-
Conococheague Formation (1)
-
-
New Albany Shale (1)
-
Ordovician
-
Lower Ordovician
-
Prairie du Chien Group (5)
-
Shakopee Formation (1)
-
-
Middle Ordovician
-
Black River Group (5)
-
Galena Dolomite (1)
-
Glenwood Shale (3)
-
Platteville Formation (1)
-
Saint Peter Sandstone (6)
-
-
Trenton Group (11)
-
Upper Ordovician
-
Katian (2)
-
Red River Formation (1)
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Sandbian (1)
-
Trentonian (12)
-
-
Utica Shale (3)
-
-
Permian (3)
-
Silurian
-
Bass Islands Dolomite (3)
-
Lockport Formation (2)
-
Lower Silurian
-
Llandovery
-
Aeronian (1)
-
-
Wenlock (3)
-
-
Middle Silurian
-
Clinton Group (2)
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Guelph Formation (2)
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Rochester Formation (1)
-
-
Niagaran (29)
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Upper Silurian
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Cayugan (2)
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Salina Group (9)
-
-
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upper Paleozoic
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Antrim Shale (14)
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Woodford Shale (1)
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Phanerozoic (2)
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Precambrian
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Animikie Group (3)
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Biwabik Iron Formation (2)
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Gunflint Iron Formation (2)
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middle Precambrian (1)
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Nonesuch Shale (17)
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Osler Series (1)
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Sokoman Formation (1)
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upper Precambrian
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Proterozoic
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Baraga Group (3)
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Copper Harbor Conglomerate (12)
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Portage Lake Lava Series (11)
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Mesoproterozoic
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Freda Sandstone (5)
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Stenian (2)
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Negaunee Iron Formation (9)
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Neoproterozoic (5)
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Oronto Group (8)
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Paleoproterozoic
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Hemlock Formation (2)
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Marquette Range Supergroup (6)
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Michigamme Formation (5)
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Witwatersrand Supergroup (1)
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igneous rocks
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porphyry (1)
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ophiolite (1)
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sorosilicates
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ring silicates
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sheet silicates
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sulfates
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sulfides
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Primary terms
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carbon
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Cenozoic
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Quaternary
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Pleistocene
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Twocreekan (1)
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Wisconsinan
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Tertiary
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Miocene (1)
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chemical analysis (2)
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Chordata
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Vertebrata
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Tetrapoda
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Mammalia
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Theria
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Eutheria
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Proboscidea
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Mastodontoidea (4)
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Reptilia
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Anapsida
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Testudines
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Thelodonti (1)
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clay mineralogy (6)
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Earth (1)
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Europe
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Graptolithina (3)
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porphyry (1)
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volcanic rocks
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basalts
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inclusions
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intrusions (20)
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Invertebrata
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Chelicerata
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Merostomata
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Mandibulata
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Crustacea
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Ostracoda (7)
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Trilobitomorpha
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Brachiopoda
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Articulata
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Pentamerida (1)
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Spiriferida (4)
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Bryozoa
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Trepostomata (1)
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Cnidaria
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Anthozoa
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Rugosa (2)
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Tabulata (1)
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Hydrozoa (1)
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Echinodermata
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Crinozoa
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Crinoidea (5)
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Echinozoa
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Mollusca
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Porifera
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Protista
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Vermes
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isostasy (5)
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stable isotopes
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C-13/C-12 (16)
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deuterium (3)
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Nd-144/Nd-143 (1)
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O-18/O-16 (12)
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Pb-206/Pb-204 (2)
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Pb-207/Pb-204 (1)
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Pb-208/Pb-204 (2)
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S-33/S-32 (1)
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land subsidence (3)
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Mesozoic
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Cretaceous
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Upper Cretaceous
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Belle Fourche Shale (1)
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Carlile Shale (1)
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Eagle Sandstone (1)
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Fruitland Formation (1)
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Judith River Formation (1)
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Milk River Formation (1)
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-
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Jurassic
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Middle Jurassic (1)
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Upper Jurassic
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Smackover Formation (1)
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metal ores
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Be-7 (1)
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magnesium (1)
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Sr-87/Sr-86 (6)
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aluminum (1)
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lead
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Pb-206/Pb-204 (2)
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metamorphic rocks
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Mexico
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North America
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Oceania
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oil and gas fields (33)
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oxygen
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O-18/O-16 (12)
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Pacific Ocean
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East Pacific
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Juan de Fuca Ridge (1)
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North Pacific
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Juan de Fuca Ridge (1)
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paleobotany (4)
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Paleozoic
-
Bedford Shale (1)
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Berea Sandstone (2)
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Cambrian
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Upper Cambrian
-
Eau Claire Formation (2)
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Franconia Formation (2)
-
Galesville Sandstone (3)
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Mount Simon Sandstone (3)
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Trempealeauan (1)
-
-
-
Carboniferous
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Lower Carboniferous
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Dinantian (1)
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Mississippian
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Lower Mississippian
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Kinderhookian (1)
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Osagian (2)
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Tournaisian (1)
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Sunbury Shale (1)
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Upper Mississippian
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Chesterian (1)
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Meramecian
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Sainte Genevieve Limestone (1)
-
-
-
-
Pennsylvanian
-
Lower Pennsylvanian (1)
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Middle Pennsylvanian
-
Atokan (2)
-
-
Saginaw Formation (3)
-
Upper Pennsylvanian (1)
-
-
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Devonian
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Cedar City Formation (1)
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Lower Devonian
-
Oriskany Sandstone (1)
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-
Middle Devonian
-
Columbus Limestone (2)
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Delaware Limestone (2)
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Detroit River Group (5)
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Dundee Limestone (8)
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Eifelian (1)
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Givetian (7)
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Hamilton Group (3)
-
Ludlowville Formation (1)
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Marcellus Shale (1)
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Moscow Formation (1)
-
Onondaga Limestone (2)
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Sylvania Formation (2)
-
Tioga Bentonite (1)
-
-
Traverse Group (18)
-
Upper Devonian
-
Cleveland Member (1)
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Famennian
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Wabamun Group (1)
-
-
Huron Member (1)
-
Nisku Formation (1)
-
Ohio Shale (2)
-
-
-
lower Paleozoic
-
Conococheague Formation (1)
-
-
New Albany Shale (1)
-
Ordovician
-
Lower Ordovician
-
Prairie du Chien Group (5)
-
Shakopee Formation (1)
-
-
Middle Ordovician
-
Black River Group (5)
-
Galena Dolomite (1)
-
Glenwood Shale (3)
-
Platteville Formation (1)
-
Saint Peter Sandstone (6)
-
-
Trenton Group (11)
-
Upper Ordovician
-
Katian (2)
-
Red River Formation (1)
-
Sandbian (1)
-
Trentonian (12)
-
-
Utica Shale (3)
-
-
Permian (3)
-
Silurian
-
Bass Islands Dolomite (3)
-
Lockport Formation (2)
-
Lower Silurian
-
Llandovery
-
Aeronian (1)
-
-
Wenlock (3)
-
-
Middle Silurian
-
Clinton Group (2)
-
Guelph Formation (2)
-
Rochester Formation (1)
-
-
Niagaran (29)
-
Upper Silurian
-
Cayugan (2)
-
Salina Group (9)
-
-
-
upper Paleozoic
-
Antrim Shale (14)
-
Kaskaskia Sequence (1)
-
-
Woodford Shale (1)
-
-
palynomorphs
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acritarchs (2)
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Chitinozoa (2)
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pollen (7)
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-
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paragenesis (11)
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permafrost (1)
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petroleum
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natural gas
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coalbed methane (2)
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-
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petrology (34)
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Phanerozoic (2)
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