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northwestern Montana
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United States
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Arizona
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Montana
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Beaverhead County Montana (3)
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Little Belt Mountains (1)
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Tobacco Root Mountains (1)
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Meagher County Montana (1)
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Missoula County Montana (3)
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Nebraska
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Nevada
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North Dakota
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Oklahoma
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Oregon
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Texas
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U. S. Rocky Mountains
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Absaroka Range
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Beartooth Mountains (2)
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Bighorn Mountains (3)
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Bitterroot Range
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Beaverhead Mountains (1)
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Bridger Range (2)
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Gravelly Range (1)
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Little Belt Mountains (1)
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Medicine Bow Mountains (1)
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San Juan Mountains (1)
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Tobacco Root Mountains (1)
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Uinta Mountains (1)
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Wasatch Range (1)
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Uinta Basin (3)
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Utah
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Garfield County Utah (1)
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Virginia (3)
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Washington
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Western U.S. (10)
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Wyoming
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Big Horn County Wyoming (1)
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Carbon County Wyoming (3)
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Teton County Wyoming
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Wyoming Province (2)
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Willow Creek (2)
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Wind River (1)
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commodities
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brines (5)
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construction materials
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energy sources (17)
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geothermal energy (4)
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graphite deposits (1)
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metal ores
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copper ores (10)
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lead ores (4)
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silver ores (8)
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tellurium ores (1)
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uranium ores (2)
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mineral deposits, genesis (22)
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mineral exploration (4)
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oil and gas fields (26)
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petroleum
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placers (2)
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talc deposits (1)
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elements, isotopes
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carbon
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organic carbon (8)
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chemical elements (1)
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chemical ratios (3)
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halogens
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chlorine
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Cl-36 (1)
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hydrogen
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isotope ratios (27)
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isotopes
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radioactive isotopes
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C-14 (2)
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Cl-36 (1)
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Pb-206/Pb-204 (3)
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Pb-207/Pb-204 (2)
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Pb-208/Pb-204 (2)
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stable isotopes
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C-13/C-12 (17)
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D/H (3)
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Hf-177/Hf-176 (2)
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Nd-144/Nd-143 (2)
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O-18/O-16 (15)
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Os-188/Os-187 (1)
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Pb-206/Pb-204 (3)
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Pb-207/Pb-204 (2)
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S-34/S-32 (3)
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Sr-87/Sr-86 (4)
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metals
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alkali metals
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sodium (1)
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alkaline earth metals
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beryllium (1)
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strontium
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Sr-87/Sr-86 (4)
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hafnium
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Hf-177/Hf-176 (2)
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iron (1)
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lead
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Pb-206/Pb-204 (3)
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Pb-207/Pb-204 (2)
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Pb-208/Pb-204 (2)
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molybdenum (1)
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osmium
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Os-188/Os-187 (1)
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platinum ores (4)
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precious metals (1)
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rare earths
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neodymium
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Nd-144/Nd-143 (2)
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silver (1)
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nitrogen (3)
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noble gases
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helium (1)
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oxygen
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O-18/O-16 (15)
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sulfur
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S-34/S-32 (3)
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fossils
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Chordata
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Mammalia
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Cervidae
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Condylarthra (1)
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Insectivora
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Neogene
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Miocene
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Pliocene
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Paleogene
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Eocene
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upper Eocene
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Hanna Formation (1)
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Oligocene
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lower Oligocene (2)
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Paleocene
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upper Paleocene
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Wasatch Formation (1)
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upper Cenozoic (1)
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Coal Measures (1)
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Mesozoic
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Cretaceous
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Dakota Formation (2)
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Lower Cretaceous
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Albian
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upper Albian (3)
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Bear River Formation (1)
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Gething Formation (1)
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Mannville Group (7)
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Mowry Shale (6)
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Mancos Shale (3)
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Middle Cretaceous (2)
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Bearpaw Formation (2)
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Campanian (5)
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Maestrichtian
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Senonian (12)
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Great Valley Sequence (1)
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Jurassic
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Upper Jurassic
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Entrada Sandstone (1)
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Navajo Sandstone (1)
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Triassic
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Upper Triassic
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Chinle Formation (1)
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Norian (1)
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Wingate Sandstone (1)
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Paleozoic
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Cambrian
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Carboniferous
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Dinantian (6)
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Lower Mississippian
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Joana Limestone (2)
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Banff Formation (1)
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Lodgepole Formation (2)
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Madison Group (3)
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Middle Mississippian
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Mission Canyon Limestone (4)
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Upper Mississippian
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Serpukhovian (1)
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Pennsylvanian
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Paradox Formation (1)
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Upper Pennsylvanian (1)
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Upper Carboniferous (2)
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Cow Head Group (1)
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Devonian
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Beaverhill Lake Group (1)
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Middle Devonian
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Winnipegosis Formation (1)
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Muth Quartzite (1)
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Upper Devonian
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Duperow Formation (1)
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Famennian
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upper Famennian (1)
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Frasnian
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Leduc Formation (1)
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Exshaw Formation (1)
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lower Paleozoic (1)
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Minnelusa Formation (1)
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Ordovician
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Red River Formation (1)
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Permian
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Cutler Formation (1)
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Guadalupian
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Grayburg Formation (1)
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Kaibab Formation (1)
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Lower Permian
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Leonardian
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Clear Fork Group (1)
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Opeche Shale (1)
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Lyons Sandstone (1)
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Meade Peak Member (2)
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Middle Permian (1)
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Park City Formation (2)
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Phosphoria Formation (2)
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Retort Phosphatic Shale Member (1)
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Rustler Formation (1)
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Upper Permian
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Lopingian (1)
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Salado Formation (1)
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Silurian
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Lower Silurian
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Wenlock (1)
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Upper Silurian
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Ludlow (1)
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upper Paleozoic
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Bakken Formation (4)
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Woodford Shale (1)
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Phanerozoic (2)
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Precambrian
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Chuar Group (1)
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Purcell System (7)
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Stillwater Complex (1)
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upper Precambrian
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Proterozoic
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Mesoproterozoic
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Altyn Limestone (1)
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Belt Supergroup (22)
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Bonner Formation (2)
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Ravalli Group (3)
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Revett Quartzite (2)
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Neoproterozoic
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Doushantuo Formation (2)
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Paleoproterozoic (3)
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Sinian
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Doushantuo Formation (2)
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Windermere System (2)
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igneous rocks
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ophiolite (2)
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volcanic ash (2)
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ophiolite (2)
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minerals
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native elements
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phosphates
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silicates
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amphibole group
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pyroxene group
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framework silicates
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silica minerals
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quartz (2)
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zeolite group
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orthosilicates
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nesosilicates
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garnet group (1)
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zircon group
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sorosilicates
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epidote group
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epidote (1)
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sheet silicates
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chlorite group
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clay minerals
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illite (10)
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mica group
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sulfates
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sulfides
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cobaltite (1)
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gersdorffite (1)
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pyrite (2)
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-
-
Primary terms
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absolute age (39)
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Africa
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North Africa
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Antarctica
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Asia
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Far East
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Australasia
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bibliography (2)
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biogeography (7)
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Canada
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carbon
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C-13/C-12 (17)
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organic carbon (8)
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Cenozoic
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Quaternary
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Cordilleran ice sheet (1)
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Younger Dryas (1)
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-
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Wisconsinan
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-
-
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upper Quaternary
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Pinedale Glaciation (1)
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-
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Siwalik System (1)
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Tertiary
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Challis Volcanics (1)
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Florissant Lake Beds (1)
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John Day Formation (1)
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lower Tertiary (2)
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Neogene
-
Bidahochi Formation (1)
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Miocene
-
Columbia River Basalt Group (5)
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Grande Ronde Basalt (2)
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lower Miocene
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Kasauli Series (1)
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-
middle Miocene (1)
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upper Miocene (2)
-
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Pliocene
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Gauss Chron (1)
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lower Pliocene (1)
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-
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Paleogene
-
Claron Formation (1)
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Eocene
-
Absaroka Supergroup (1)
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Bridgerian (1)
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Flournoy Formation (1)
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Green River Formation (2)
-
lower Eocene
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Wasatchian (1)
-
-
middle Eocene
-
Tyee Formation (1)
-
-
Subathu Formation (1)
-
Uintan (1)
-
Umpqua Formation (1)
-
upper Eocene
-
Chadronian (2)
-
Tepee Trail Formation (1)
-
-
-
Hanna Formation (1)
-
Oligocene
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lower Oligocene (2)
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Paleocene
-
lower Paleocene
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Danian (1)
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K-T boundary (6)
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Puercan (1)
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Torrejonian (1)
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Pinyon Conglomerate (1)
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Tongue River Member (1)
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Tullock Member (1)
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upper Paleocene
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Tiffanian (2)
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-
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Wasatch Formation (1)
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-
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upper Cenozoic (1)
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Central America
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Chordata
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Vertebrata
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