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all geography including DSDP/ODP Sites and Legs
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Africa
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Central Africa
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Angola
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Cabinda Angola (1)
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Utah
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commodities
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hydrogen
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isotopes
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radioactive isotopes
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Pb-206/Pb-204 (1)
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stable isotopes
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C-13/C-12 (15)
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O-18/O-16 (12)
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Pb-206/Pb-204 (1)
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S-34/S-32 (2)
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Sm-147/Nd-144 (1)
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Sr-87/Sr-86 (4)
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metals
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actinides
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uranium
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U-235 (1)
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U-238 (1)
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alkaline earth metals
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strontium
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Sr-87/Sr-86 (4)
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lead
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Pb-206/Pb-204 (1)
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Pb-207/Pb-206 (1)
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platinum group (1)
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precious metals (1)
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rare earths
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europium (2)
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neodymium
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Nd-144/Nd-143 (1)
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Sm-147/Nd-144 (1)
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samarium
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Sm-147/Nd-144 (1)
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yttrium (1)
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zirconium (1)
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oxygen
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O-18/O-16 (12)
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sulfur
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S-33/S-32 (1)
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S-34/S-32 (2)
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fossils
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burrows (4)
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Chordata
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Vertebrata
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Pisces
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Osteichthyes
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Actinopterygii
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Teleostei (1)
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Tetrapoda
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Amphibia
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Lissamphibia
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Caudata (1)
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Aves
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Neornithes
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Neognathae
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Galliformes (1)
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Mammalia
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Multituberculata (4)
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Theria
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Artiodactyla
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Ruminantia
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Bison (1)
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Cervidae (1)
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Tylopoda
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Camelidae (3)
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Carnivora
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Fissipeda
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Canidae (1)
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Felidae
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Panthera (1)
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Ursidae (1)
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Chiroptera (1)
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Creodonta (1)
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Edentata
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Insectivora (1)
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Lagomorpha
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Notoungulata (2)
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Perissodactyla
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Rhinocerotidae
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Rhinoceros (1)
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Hippomorpha
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Equidae
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Equus (3)
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Proboscidea
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Elephantoidea
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Elephantidae
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Elephas (1)
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Mammuthus
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Mammuthus columbi (2)
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Gomphotheriidae (1)
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Mastodontoidea
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Mammutidae
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Mammut (1)
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Rodentia
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Castoridae (1)
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Myomorpha
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Cricetidae (2)
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Sciuromorpha
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Sciuridae (1)
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Sirenia (1)
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Tillodontia (1)
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Ungulata (2)
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Metatheria
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Marsupialia
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Polyprotodontia
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Didelphidae (1)
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Reptilia
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Anapsida
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Testudines
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Chelonia (1)
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Cryptodira (1)
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Diapsida
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Archosauria
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Crocodilia
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Alligator (1)
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dinosaurs
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Ornithischia
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Ornithopoda
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Hadrosauridae (1)
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Saurischia
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Sauropodomorpha
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Sauropoda (1)
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Sauropterygia
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Plesiosauria (1)
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coprolites (1)
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Invertebrata
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Arthropoda
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Cirripedia (1)
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Ostracoda
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Podocopida
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Cypridocopina
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Cyprididae (1)
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Insecta
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Pterygota
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Neoptera
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Endopterygota
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Coleoptera (1)
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Trilobitomorpha
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Trilobita (1)
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Echinodermata
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Asterozoa
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Stelleroidea
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Asteroidea (1)
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Mollusca
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Bivalvia
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Nuculanidae (1)
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Pterioida
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Pteriina
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Inocerami
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Inoceramus (1)
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Cephalopoda
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Ammonoidea
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Baculites (1)
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Gastropoda
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Naticidae (1)
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Scaphopoda (1)
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Protista
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Foraminifera (4)
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microfossils (19)
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palynomorphs
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Dinoflagellata (4)
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pollen (6)
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Plantae
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Pteridophyta (1)
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Spermatophyta
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Gymnospermae
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Coniferales
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Pinaceae (1)
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Taxodiaceae (1)
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tracks (3)
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geochronology methods
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Ar/Ar (21)
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He/He (1)
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tephrochronology (4)
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thermochronology (4)
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U/Pb (37)
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Cenozoic
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Blancan (4)
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Glenns Ferry Formation (1)
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Quaternary
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Holocene (2)
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Pleistocene
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lower Pleistocene (1)
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upper Pleistocene
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Rancholabrean (2)
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-
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upper Quaternary (1)
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Tertiary
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Arikareean (2)
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John Day Formation (3)
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middle Tertiary
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Deseadan (1)
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Muddy Creek Formation (1)
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Neogene
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Bidahochi Formation (1)
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Hemphillian (4)
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Miocene
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Ash Hollow Formation (3)
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Barstovian (2)
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Barstow Formation (7)
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Clarendonian (3)
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Columbia River Basalt Group (2)
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Ellensburg Formation (1)
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lower Miocene
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Hemingfordian (2)
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middle Miocene (7)
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Saddle Mountains Basalt (1)
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upper Miocene
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Punchbowl Formation (1)
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Valentine Formation (1)
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Yakima Basalt (1)
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Ogallala Formation (4)
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Pliocene
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lower Pliocene (2)
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upper Pliocene
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Rexroad Formation (1)
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-
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Ringold Formation (2)
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upper Neogene (1)
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Paleogene
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Duchesne River Formation (1)
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Eocene
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Bridger Formation (3)
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Bridgerian (4)
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Chuckanut Formation (1)
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Clarno Formation (1)
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Green River Formation (5)
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Lake Gosiute (1)
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lower Eocene
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Wasatchian (5)
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Willwood Formation (1)
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Wind River Formation (3)
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Ypresian (2)
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middle Eocene
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Aycross Formation (1)
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Laney Shale Member (1)
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Santee Limestone (1)
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Uintan (1)
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upper Eocene
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Chadronian (2)
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La Meseta Formation (1)
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Uinta Formation (1)
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Wilkins Peak Member (1)
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Hanna Formation (6)
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lower Paleogene (1)
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Ocala Group (1)
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Oligocene
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middle Oligocene (1)
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upper Oligocene (3)
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Paleocene
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Lebo Member (1)
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lower Paleocene
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Danian (1)
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K-T boundary (5)
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Puercan (3)
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middle Paleocene
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Selandian (1)
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Nacimiento Formation (1)
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Ravenscrag Formation (3)
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Tullock Member (1)
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upper Paleocene
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Clarkforkian (1)
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Thanetian (1)
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Tiffanian (5)
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-
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Paleocene-Eocene Thermal Maximum (3)
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Renova Formation (2)
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Sespe Formation (1)
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upper Paleogene (1)
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Wasatch Formation (4)
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White River Group (1)
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Sarmiento Formation (1)
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upper Cenozoic (2)
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Mesozoic
-
Cretaceous
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Bulldog Shale (1)
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Lower Cretaceous
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Aptian (1)
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Cloverly Formation (1)
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Mowry Shale (1)
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Upper Cretaceous
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Campanian
-
Dinosaur Park Formation (1)
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Cenomanian (1)
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Lance Formation (2)
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Maestrichtian
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Mesaverde Group (1)
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Ojo Alamo Sandstone (1)
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Two Medicine Formation (1)
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Jurassic
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Morrison Formation (2)
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Sundance Formation (1)
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lower Mesozoic (1)
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Lower Triassic
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Bunter (1)
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Paleozoic
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Prince Albert Group (2)
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Aphebian
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igneous rocks
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igneous rocks
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volcanic ash (3)
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zeolite group (1)
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orthosilicates
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zircon group
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sheet silicates
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Primary terms
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absolute age (54)
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Africa
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carbon
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organic carbon (1)
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Cenozoic
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Quaternary
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upper Quaternary (1)
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Tertiary
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John Day Formation (3)
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Deseadan (1)
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Muddy Creek Formation (1)
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Neogene
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Miocene
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Ash Hollow Formation (3)
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Columbia River Basalt Group (2)
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lower Miocene
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middle Miocene (7)
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Saddle Mountains Basalt (1)
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upper Miocene
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Punchbowl Formation (1)
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Valentine Formation (1)
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Yakima Basalt (1)
-
-
Ogallala Formation (4)
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Pliocene
-
lower Pliocene (2)
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upper Pliocene
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Rexroad Formation (1)
-
-
-
Ringold Formation (2)
-
upper Neogene (1)
-
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Paleogene
-
Duchesne River Formation (1)
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Eocene
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Bridger Formation (3)
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Chuckanut Formation (1)
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Clarno Formation (1)
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Lake Gosiute (1)
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lower Eocene
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Wasatchian (5)
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middle Eocene
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Aycross Formation (1)
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Laney Shale Member (1)
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Santee Limestone (1)
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Uintan (1)
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upper Eocene
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Chadronian (2)
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Uinta Formation (1)
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Wilkins Peak Member (1)
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Hanna Formation (6)
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lower Paleogene (1)
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Oligocene
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Paleocene
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Lebo Member (1)
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Nacimiento Formation (1)
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Paleocene-Eocene Thermal Maximum (3)
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Renova Formation (2)
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upper Paleogene (1)
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Wasatch Formation (4)
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Sarmiento Formation (1)
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upper Cenozoic (2)
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Central America
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Belize (1)
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Panama
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Chordata
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Mammalia
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Multituberculata (4)
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Insectivora (1)
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Hippomorpha
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Equus (3)
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Proboscidea
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Elephas (1)
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Gomphotheriidae (1)
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Mastodontoidea
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Mammut (1)
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Rodentia
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Reptilia
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Diapsida
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Archosauria
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dinosaurs
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Ornithischia
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Saurischia
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Sauropterygia
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Invertebrata
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Insecta
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Echinodermata
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Mesozoic
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Cloverly Formation (1)
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Upper Cretaceous
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Campanian
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Dinosaur Park Formation (1)
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Cenomanian (1)
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Cody Shale (1)
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Elkhorn Mountains Volcanics (1)
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Frontier Formation (1)
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Fruitland Formation (1)
-
Hell Creek Formation (3)
-
Javelina Formation (1)
-
Judith River Formation (1)
-
Kaiparowits Formation (1)
-
K-T boundary (5)
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Lance Formation (2)
-
Maestrichtian
-
upper Maestrichtian (1)
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-
Mesaverde Group (1)
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Milk River Formation (1)
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Ojo Alamo Sandstone (1)
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Senonian (5)
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Turonian (1)
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Two Medicine Formation (1)
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-
-
Jurassic
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Middle Jurassic (1)
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Upper Jurassic
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Morrison Formation (2)
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Sundance Formation (1)
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-
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lower Mesozoic (1)
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Triassic
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Lower Triassic
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Bunter (1)
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Sherwood Sandstone (1)
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Coniferales
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Pinaceae (1)
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Taxodiaceae (1)
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plate tectonics (7)
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Precambrian
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Archean
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Neoarchean (7)
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Prince Albert Group (2)
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upper Precambrian
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Proterozoic
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Mesoproterozoic
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Belt Supergroup (1)
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Paleoproterozoic
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Aphebian
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Hurwitz Group (1)
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Rhyacian (1)
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remote sensing (1)
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sea water (1)
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sea-level changes (7)
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sedimentary petrology (1)
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sedimentary rocks
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carbonate rocks
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limestone (4)
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chemically precipitated rocks
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chert (1)
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evaporites (1)
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iron formations
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banded iron formations (3)
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clastic rocks
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conglomerate (1)
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diatomite (1)
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mudstone (3)
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sandstone (5)
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shale (2)
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siltstone (3)
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coal (2)
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sedimentary structures
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biogenic structures
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lebensspuren (1)
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planar bedding structures
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cross-stratification (1)
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secondary structures
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concretions (4)
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sedimentation (7)
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sediments
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clastic sediments
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alluvium (3)
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boulder clay (1)
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gravel (2)
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till (1)
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shorelines (1)
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South America
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Amazon Basin (3)
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Argentina
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Chubut Argentina (6)
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Santa Cruz Argentina (1)
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Bolivia (1)
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Brazil
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Acre Brazil (2)
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Patagonia (5)
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Peru
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Ucayali Peru (1)
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Southern Hemisphere (1)
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stratigraphy (4)
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structural analysis (4)
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sulfur
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S-33/S-32 (1)
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S-34/S-32 (2)
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tectonics
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neotectonics (3)
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United States
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Alaska
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Aniakchak (1)
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Denali National Park (1)
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Arizona
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La Paz County Arizona (1)
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Atlantic Coastal Plain
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Southern Atlantic Coastal Plain (1)
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Bighorn Basin (3)
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California
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Central California (1)
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Contra Costa County California (2)
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Coyote Creek Fault (1)
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Cuyama Basin (1)
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Inyo County California (1)
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Los Angeles County California (1)
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Madera County California (1)
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Mammoth Mountain (2)
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Modoc County California (1)
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Mono County California
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Long Valley Caldera (2)
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Orange County California (1)
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Riverside County California (3)
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Salton Trough (1)
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San Bernardino County California
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Barstow California (2)
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San Bernardino California (1)
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San Diego County California (1)
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San Francisco Bay region (1)
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San Gabriel Fault (1)
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Santa Barbara County California
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Santa Maria California (1)
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Southern California (10)
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Transverse Ranges (3)
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Whittier Fault (1)
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Colorado
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Jackson County Colorado (1)
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Park County Colorado (1)
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Colorado Plateau (3)
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Denver Basin (1)
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Florida
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Alachua County Florida (2)
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Citrus County Florida (1)
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Gilchrist County Florida (1)
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Marion County Florida (1)
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Georgia (1)
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Idaho
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Lemhi County Idaho (1)
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Snake River plain (1)
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Twin Falls County Idaho (1)
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Kansas
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Clark County Kansas (1)
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Meade County Kansas (3)
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Mojave Desert (7)
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Montana
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Crazy Mountains Basin (1)
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Garfield County Montana (2)
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Granite County Montana (1)
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Lewis and Clark County Montana
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Powell County Montana (1)
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Nebraska
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Antelope County Nebraska (1)
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Brown County Nebraska (1)
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Cherry County Nebraska (2)
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Dawes County Nebraska (1)
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Garden County Nebraska (1)
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Greeley County Nebraska (1)
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Nevada (3)
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New Mexico (1)
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Oklahoma
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Oregon
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Grant County Oregon (1)
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Lane County Oregon (1)
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Linn County Oregon (1)
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Marion County Oregon (1)
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Multnomah County Oregon
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Portland Oregon (1)
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Wasco County Oregon (1)
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Wheeler County Oregon (3)
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Willamette Valley (1)
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Sevier orogenic belt (2)
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Southwestern U.S. (3)
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Texas
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Nueces River (1)
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U. S. Rocky Mountains
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Absaroka Range
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Uinta Basin (2)
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Utah
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Carbon County Utah (1)
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Emery County Utah (1)
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Sanpete County Utah (1)
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Wasatch Plateau (1)
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Washakie Basin (3)
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Washington
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Grant County Washington (1)
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Whatcom County Washington (1)
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Western U.S. (3)
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Wyoming
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Carbon County Wyoming (4)
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Fremont County Wyoming (2)
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Hanna Basin (7)
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Lincoln County Wyoming (2)
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Niobrara County Wyoming (1)
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Park County Wyoming (1)
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Rock Springs Uplift (1)
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Sublette County Wyoming (1)
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Sweetwater County Wyoming (5)
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Wind River Range (1)
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Yellowstone River (1)
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water resources (1)
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weathering (6)
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rock formations
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Eureka Sound Group (3)
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Fort Union Formation (3)
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Imperial Formation (1)
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Lopez de Bertodano Formation (2)
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Monterey Formation (1)
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North Horn Formation (1)
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Paskapoo Formation (2)
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White Limestone (1)
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sedimentary rocks
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sedimentary rocks
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carbonate rocks
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limestone (4)
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chemically precipitated rocks
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chert (1)
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evaporites (1)
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iron formations
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banded iron formations (3)
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clastic rocks
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conglomerate (1)
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diatomite (1)
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mudstone (3)
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sandstone (5)
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shale (2)
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siltstone (3)
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coal (2)
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siliciclastics (1)
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volcaniclastics (6)
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sedimentary structures
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burrows (4)
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channels (1)
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coprolites (1)
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sedimentary structures
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biogenic structures
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lebensspuren (1)
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planar bedding structures
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cross-stratification (1)
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secondary structures
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concretions (4)
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tracks (3)
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sediments
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sediments
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clastic sediments
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alluvium (3)
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boulder clay (1)
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gravel (2)
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till (1)
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siliciclastics (1)
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volcaniclastics (6)
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soils
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paleosols (9)
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GeoRef Categories
Era and Period
Epoch and Age