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Bison (1)
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Cervidae
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Cervus (1)
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Perissodactyla (1)
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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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Synapsida
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Therapsida (1)
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Graptolithina
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Graptoloidea
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Monograptina (1)
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Hemichordata (2)
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ichnofossils
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Arenicolites (2)
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Chondrites ichnofossils (1)
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Cruziana (1)
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Skolithos (1)
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Invertebrata
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Archaeocyatha (2)
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Arthropoda
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Mandibulata
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Crustacea
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Ostracoda (3)
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Trilobitomorpha
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Trilobita
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Agnostida (1)
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Phacopida (1)
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Redlichiida (1)
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Brachiopoda (4)
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Bryozoa (1)
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Cnidaria
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Anthozoa (2)
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Echinodermata
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Crinozoa
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Eocrinoidea (1)
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Mollusca
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Bivalvia
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Heterodonta
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Veneroida
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Cardiidae (1)
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Mactra (1)
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Ostreoidea
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Ostreidae
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Crassostrea (1)
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Ostrea (1)
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Cephalopoda
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Ammonoidea (2)
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Gastropoda (1)
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Porifera
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Stromatoporoidea (1)
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Protista
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Foraminifera
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Rotaliina
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Rotaliacea
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Nummulitidae
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Nummulites (1)
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Radiolaria (7)
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Metazoa (1)
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microfossils
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Conodonta (8)
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problematic microfossils (1)
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palynomorphs
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miospores
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pollen (3)
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Plantae
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algae (2)
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Spermatophyta
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Gymnospermae
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Coniferales (1)
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problematic fossils
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problematic microfossils (1)
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Pterobranchia (2)
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thallophytes (1)
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geochronology methods
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(U-Th)/He (1)
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Ar/Ar (56)
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fission-track dating (1)
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hydration of glass (1)
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K/Ar (14)
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Lu/Hf (2)
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Nd/Nd (1)
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optical dating (1)
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optically stimulated luminescence (1)
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paleomagnetism (28)
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Pb/Pb (8)
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Rb/Sr (8)
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Re/Os (9)
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Sm/Nd (13)
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Th/U (1)
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thermochronology (4)
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U/Pb (156)
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U/Th/Pb (2)
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geologic age
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Cenozoic
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Quaternary
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Holocene
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Mesolithic (1)
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Middle Ages (1)
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upper Holocene
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Roman period (1)
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Pleistocene
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lower Pleistocene (1)
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Matuyama Chron (1)
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upper Pleistocene
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Neapolitan Yellow Tuff (1)
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upper Quaternary (1)
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Saugus Formation (1)
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Stone Age
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Mesolithic (1)
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Paleolithic (1)
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Tertiary
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Challis Volcanics (1)
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lower Tertiary (4)
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middle Tertiary (1)
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Neogene
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Miocene
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Columbia River Basalt Group (2)
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lower Miocene (5)
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middle Miocene
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Langhian (1)
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Serravallian (2)
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Oakville Sandstone (1)
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Sarmatian (1)
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upper Miocene
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Messinian (1)
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Modelo Formation (1)
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Pontian (1)
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Tortonian (1)
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Pliocene
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Goliad Sand (1)
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lower Pliocene (2)
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Paleogene
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Dongying Formation (2)
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Eocene
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Chumstick Formation (4)
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Clarno Formation (1)
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Flournoy Formation (1)
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lower Eocene
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Ypresian (2)
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middle Eocene
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Tyee Formation (1)
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Ootsa Lake Group (1)
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Swauk Formation (3)
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Uintan (1)
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Umpqua Formation (2)
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upper Eocene
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Priabonian (1)
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Whitsett Formation (1)
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lower Paleogene (1)
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Oligocene
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upper Oligocene (3)
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Paleocene
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lower Paleocene (1)
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upper Paleocene (1)
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Shahejie Formation (2)
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upper Cenozoic
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Newer Volcanics (1)
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Pico Formation (1)
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Dalradian (3)
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Laurentide ice sheet (1)
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Mesozoic
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Condrey Mountain Schist (1)
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Cretaceous
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Blairmore Group (1)
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Comanchean
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Fredericksburg Group (1)
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Kuskokwim Group (1)
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Lower Cretaceous
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Albian (4)
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Aptian (2)
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Barremian (1)
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Berriasian (1)
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Christopher Formation (1)
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Fredericksburg Group (1)
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Hauterivian (1)
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Isachsen Formation (1)
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Lagoa Feia Formation (1)
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Neocomian (1)
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Valanginian (1)
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Middle Cretaceous (4)
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Upper Cretaceous
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Bearpaw Formation (1)
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Campanian (4)
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Cenomanian
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lower Cenomanian (1)
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Judith River Formation (1)
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Maestrichtian (1)
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Santonian (1)
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Senonian (2)
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Franciscan Complex (5)
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Great Valley Sequence (2)
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Jurassic
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Bonanza Group (1)
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Clarens Formation (1)
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Coast Range Ophiolite (2)
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Ferrar Group (1)
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Kirkpatrick Basalt (1)
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Lower Jurassic
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Hettangian (1)
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lower Liassic (1)
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middle Liassic (1)
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Pliensbachian (1)
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Sinemurian (1)
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Sunrise Formation (1)
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Talkeetna Formation (1)
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Toarcian (2)
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upper Liassic (2)
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Middle Jurassic (6)
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Upper Jurassic
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Josephine Ophiolite (2)
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Kimmeridgian (1)
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Oxfordian (2)
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Tithonian (1)
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lower Mesozoic (4)
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Serra Geral Formation (1)
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Triassic
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Lower Triassic
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Permian-Triassic boundary (8)
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Middle Triassic
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Anisian (2)
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Shublik Formation (2)
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Upper Triassic
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Carnian
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Ischigualasto Formation (1)
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Karmutsen Group (5)
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Norian (2)
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Sag River Sandstone (1)
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Yanchang Formation (1)
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upper Mesozoic (4)
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Paleozoic
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Cambrian
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Lower Cambrian
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Chilhowee Group (2)
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Tommotian (1)
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Middle Cambrian (2)
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Mount Read Volcanics (4)
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Upper Cambrian
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Furongian (1)
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Goldenville Formation (2)
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Carboniferous
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Benxi Formation (1)
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Lower Carboniferous
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Asbian (1)
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Dinantian (2)
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Middle Carboniferous (1)
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Mississippian
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Lower Mississippian
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Kayak Shale (1)
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Tournaisian (2)
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Middle Mississippian
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Visean (3)
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Price Formation (1)
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Upper Mississippian
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Serpukhovian (1)
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Namurian (1)
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Pennsylvanian
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Upper Pennsylvanian (1)
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Upper Carboniferous
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Westphalian (1)
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Devonian
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Lower Devonian
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Emsian (3)
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Lochkovian (1)
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Pragian (1)
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York River Formation (1)
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Middle Devonian (4)
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Upper Devonian
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Frasnian (2)
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Kanayut Conglomerate (1)
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Earn Group (1)
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Endicott Group (2)
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Lisburne Group (3)
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lower Paleozoic
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Cape Phillips Formation (1)
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middle Paleozoic (2)
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Ordovician
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Buchans Group (2)
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Lower Ordovician
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Arenigian (2)
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Beekmantown Group (1)
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Tremadocian
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Halifax Formation (1)
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Martinsburg Formation (1)
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Middle Ordovician
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Chazy Group (1)
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Darriwilian (2)
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Llanvirnian (1)
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Tetagouche Group (1)
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Trenton Group (2)
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Upper Ordovician
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Caradocian
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Borrowdale Volcanic Group (3)
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Queenston Shale (1)
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Trentonian (1)
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Utica Shale (1)
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Permian
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Ecca Group (2)
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Echooka Formation (2)
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Guadalupian (1)
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Longtan Formation (1)
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Lower Permian
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Cisuralian
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Kungurian (1)
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Middle Permian (3)
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Upper Permian
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Permian-Triassic boundary (8)
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Vryheid Formation (1)
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Silurian
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Lockport Formation (1)
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Lower Silurian
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Llandovery
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Aeronian (1)
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Rhuddanian (1)
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Middle Silurian
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Clinton Group (1)
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Niagaran (1)
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Upper Silurian (1)
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Taiyuan Formation (1)
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upper Paleozoic
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Dwyka Formation (3)
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Shanxi Formation (1)
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Sicker Group (1)
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Tunguska Series (1)
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Phanerozoic (7)
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Precambrian
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Animikie Group (2)
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Archean
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Blake River Group (7)
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Gilman Formation (1)
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Mesoarchean (8)
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Neoarchean
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Dharwar Supergroup (1)
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Paleoarchean
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Hooggenoeg Formation (1)
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Rice Lake Group (1)
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Timiskaming Group (2)
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Warrawoona Group (1)
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Catoctin Formation (2)
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Central Rand Group (2)
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Missi Group (3)
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Nonesuch Shale (1)
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North Shore Volcanics (4)
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Onverwacht Group (1)
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Osler Series (2)
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Pongola Supergroup (6)
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Purcell System (1)
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Transvaal Supergroup (3)
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upper Precambrian
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Proterozoic
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Baraga Group (1)
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Damara System (1)
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Huronian
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Onaping Formation (1)
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