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Mammalia
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Theria
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Eutheria
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Primates
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Hominidae (1)
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Reptilia
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Diapsida
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Archosauria
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dinosaurs (1)
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ichnofossils (2)
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Invertebrata
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Arthropoda
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Mandibulata
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Crustacea
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Ostracoda (1)
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Cnidaria (1)
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Mollusca (1)
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Porifera
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Stromatoporoidea (1)
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Protista
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Foraminifera (4)
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Radiolaria (1)
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microfossils
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Conodonta (1)
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palynomorphs
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miospores
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pollen (1)
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Plantae
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algae
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Coccolithophoraceae (3)
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diatoms (2)
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nannofossils
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Nannoconus (1)
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thallophytes (2)
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geochronology methods
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Ar/Ar (5)
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fission-track dating (2)
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K/Ar (53)
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paleomagnetism (5)
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Rb/Sr (14)
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Sr/Sr (1)
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thermochronology (1)
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U/Pb (1)
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geologic age
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Cenozoic
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Agbada Formation (1)
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Gila Conglomerate (1)
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Quaternary
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Holocene
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upper Holocene (1)
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Pleistocene
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Bandelier Tuff (1)
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lower Pleistocene (1)
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upper Pleistocene (1)
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upper Quaternary (6)
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Tertiary
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Anahuac Formation (1)
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Arikaree Group (1)
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lower Tertiary (7)
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Neogene
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Miocene
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Antelope Shale (1)
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Columbia River Basalt Group (4)
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Guantao Formation (1)
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lower Miocene
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Aquitanian (1)
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Burdigalian (1)
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middle Miocene (3)
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Pungo River Formation (1)
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Sarmatian (1)
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Surma Group (1)
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Topopah Spring Member (1)
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upper Miocene
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Messinian (3)
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Tortonian (1)
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Pliocene
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lower Pliocene (2)
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Paleogene
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Chadron Formation (1)
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Dongying Formation (1)
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Eocene
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Green River Formation (1)
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lower Eocene
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Thebes Formation (1)
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middle Eocene
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Aycross Formation (1)
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Claiborne Group (1)
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Queen City Formation (1)
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upper Eocene (3)
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lower Paleogene (1)
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Oligocene
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Boom Clay (2)
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Frio Formation (11)
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lower Oligocene
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Rupelian (1)
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middle Oligocene (2)
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upper Oligocene (2)
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Vicksburg Group (2)
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Paleocene
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Clayton Formation (1)
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lower Paleocene
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Danian (5)
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K-T boundary (9)
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middle Paleocene
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Selandian (1)
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Porters Creek Formation (1)
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upper Paleocene (2)
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Paleocene-Eocene Thermal Maximum (1)
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White River Group (2)
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Wilcox Group (6)
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Shahejie Formation (2)
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upper Cenozoic (2)
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Coal Measures (1)
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Mesozoic
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Antalya Complex (1)
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Cretaceous
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Asu River Group (1)
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Colorado Group (1)
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Comanchean
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Buda Limestone (1)
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Dakota Formation (2)
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Lower Cretaceous
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Albian (8)
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Aptian (3)
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Barremian (2)
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Berriasian (2)
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Clearwater Formation (2)
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Gething Formation (1)
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Hauterivian (1)
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Lagoa Feia Formation (1)
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McMurray Formation (1)
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Moosebar Formation (1)
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Mowry Shale (3)
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Muddy Sandstone (2)
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Muderong Shale (2)
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Neocomian (1)
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Skull Creek Shale (2)
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Spirit River Formation (1)
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Valanginian (1)
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Wealden (1)
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Mancos Shale (5)
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Nanushuk Group (1)
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Qingshankou Formation (1)
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Upper Cretaceous
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Belle Fourche Shale (2)
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Belly River Formation (1)
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Buda Limestone (1)
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Campanian
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lower Campanian (1)
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Carlile Shale (1)
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Cenomanian
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lower Cenomanian (2)
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Colville Group (1)
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Coniacian (1)
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Duwi Formation (1)
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Fort Hays Limestone Member (1)
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Gulfian
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Austin Chalk (2)
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Austin Group (3)
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Eagle Ford Formation (2)
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Hell Creek Formation (1)
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K-T boundary (9)
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Lance Formation (1)
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Maestrichtian
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lower Maestrichtian (1)
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upper Maestrichtian (1)
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Milk River Formation (1)
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Niobrara Formation (2)
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Pierre Shale (4)
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Prince Creek Formation (1)
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Santonian (2)
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Senonian (9)
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Sharon Springs Member (1)
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Smoky Hill Chalk Member (1)
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Teapot Sandstone Member (1)
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Turonian
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upper Turonian (2)
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Tuscaloosa Formation (2)
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Viking Formation (2)
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Whitemud Formation (1)
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Franciscan Complex (1)
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Jurassic
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Lower Jurassic
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Dunlin Group (1)
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Hettangian (1)
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lower Liassic (2)
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Toarcian
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lower Toarcian (1)
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Triassic-Jurassic boundary (1)
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upper Liassic (4)
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Middle Jurassic
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Aalenian (1)
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Bajocian
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Brent Group (4)
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Bathonian
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Great Oolite Group (1)
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Callovian (4)
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Dogger (1)
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Oxford Clay (1)
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Posidonia Shale (2)
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Upper Jurassic
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Brushy Basin Member (1)
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Cotton Valley Group (1)
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Entrada Sandstone (2)
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Fulmar Formation (2)
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Kimmeridge Clay (3)
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Kimmeridgian (4)
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Morrison Formation (3)
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Oxfordian (6)
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Portlandian (3)
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Tithonian (4)
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Newark Supergroup (1)
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Statfjord Formation (1)
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Triassic
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Lower Triassic
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Permian-Triassic boundary (1)
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Middle Triassic (1)
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Upper Triassic
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Carnian (1)
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Mercia Mudstone (1)
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Rhaetian
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Penarth Group (1)
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Triassic-Jurassic boundary (1)
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upper Mesozoic (1)
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Paleozoic
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Cambrian
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Bonanza King Formation (1)
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Lower Cambrian (3)
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Upper Cambrian
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Potsdam Sandstone (1)
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Carboniferous
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Lower Carboniferous
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Dinantian (6)
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Mississippian
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Barnett Shale (1)
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Middle Mississippian
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Visean (3)
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Stanley Group (1)
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Upper Mississippian
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Chesterian
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Cypress Sandstone (1)
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Windsor Group (2)
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Namurian (2)
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Pennsylvanian
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Excello Shale (1)
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Herrin Coal Member (1)
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Middle Pennsylvanian
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Atokan (1)
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Carbondale Formation (1)
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Desmoinesian (1)
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Moscovian (2)
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Morrow Formation (1)
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Upper Pennsylvanian
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Gzhelian (1)
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Virgilian (1)
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Upper Carboniferous
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Westphalian (2)
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Devonian
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Lower Devonian (1)
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Middle Devonian
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Marcellus Shale (1)
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Tioga Bentonite (1)
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Old Red Sandstone (2)
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Upper Devonian
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Famennian (1)
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Frasnian (1)
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Grosmont Formation (1)
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Helderberg Group (1)
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Hunton Group (1)
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lower Paleozoic (2)
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New Albany Shale (1)
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Ordovician
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Martinsburg Formation (1)
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Middle Ordovician
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Black River Group (1)
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Deicke Bentonite Bed (1)
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High Bridge Group (1)
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Trenton Group (1)
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Upper Ordovician
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Caradocian (1)
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Trentonian (1)
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Permian
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Cutler Formation (1)
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Ecca Group (1)
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Guadalupian
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Queen Formation (1)
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Lower Permian
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Cisuralian
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Artinskian (2)
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Kungurian (1)
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Leonardian
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Bone Spring Limestone (1)
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Wolfcampian (1)
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Rotliegendes (4)
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Unayzah Formation (1)
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Upper Permian
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Permian-Triassic boundary (1)
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Vryheid Formation (1)
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Silurian
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Lower Silurian
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Grimsby Sandstone (2)
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Whirlpool Sandstone (1)
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Middle Silurian
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Clinton Group (1)
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upper Paleozoic
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Fountain Formation (1)
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Woodford Shale (1)
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Precambrian
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Archean (1)
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Lewisian Complex (1)
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Nonesuch Shale (3)
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upper Precambrian
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