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rare earths
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neodymium
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Nd-144/Nd-143 (11)
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Sm-147/Nd-144 (1)
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Sm-147/Nd-144 (1)
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nitrogen
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noble gases
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helium
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He-4/He-3 (1)
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radon (1)
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oxygen
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O-18/O-16 (27)
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sulfur
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S-34/S-32 (5)
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trace metals (1)
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fossils
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Chordata
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Vertebrata
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Osteichthyes
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Actinopterygii
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Tetrapoda
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Aves
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Mammalia
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Theria
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Eutheria
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Cetacea (1)
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Insectivora
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Dermoptera (1)
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Perissodactyla (2)
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Proboscidea
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Elephantoidea
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Elephantidae
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Rodentia (1)
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Tillodontia (1)
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Metatheria
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Marsupialia (1)
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Reptilia
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Anapsida
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Testudines
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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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Eusuchia
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Crocodylidae (1)
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-
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dinosaurs
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Ornithischia
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Ornithopoda (1)
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Saurischia
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Theropoda (2)
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Pterosauria (1)
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cyanobacteria (1)
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ichnofossils
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Chondrites ichnofossils (1)
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Diplocraterion (1)
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Skolithos (1)
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Invertebrata
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Arthropoda
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Crustacea
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Ostracoda (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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Hymenoptera (1)
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-
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Trilobitomorpha
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Trilobita
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Phacopida (2)
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-
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Brachiopoda
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Articulata
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Pentamerida (1)
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Spiriferida
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Atrypidae
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Atrypa (1)
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Bryozoa (1)
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Cnidaria
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Anthozoa
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Zoantharia
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Scleractinia (1)
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-
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Echinodermata
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Echinozoa
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Echinoidea (1)
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Mollusca
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Bivalvia
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Heterodonta
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Rudistae (1)
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Pterioida
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Pteriina
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Inocerami
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Inoceramidae (1)
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Pectinacea
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Halobia (1)
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Monotis (1)
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-
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Cephalopoda
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Ammonoidea
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Ammonites (1)
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Psiloceratida (1)
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Gastropoda
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Neogastropoda (1)
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Hyolithes (1)
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Protista
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Foraminifera
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Fusulinina
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Radiolaria (5)
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microfossils
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Conodonta (6)
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Fusulinidae (1)
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palynomorphs
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Dinoflagellata (1)
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miospores
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pollen (5)
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Plantae
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algae
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Chlorophyta
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Chlorophyceae
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Codiaceae
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Halimeda (1)
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Coccolithophoraceae (1)
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diatoms (4)
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nannofossils (1)
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Bryophyta (2)
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Spermatophyta
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Angiospermae
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Dicotyledoneae
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Hamamelididae (1)
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Lauraceae (2)
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Gymnospermae
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Coniferales
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Taxodiaceae
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Metasequoia (2)
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problematic fossils (2)
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tracks (1)
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geochronology methods
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(U-Th)/He (18)
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Ar/Ar (75)
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exposure age (3)
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fission-track dating (24)
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infrared stimulated luminescence (3)
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tree rings (4)
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U/Pb (77)
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geologic age
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Cenozoic
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Glenns Ferry Formation (1)
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Quaternary
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Cordilleran ice sheet (2)
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Holocene
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upper Holocene
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Roman period (1)
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Mazama Ash (2)
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Pleistocene
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Bandelier Tuff (1)
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Bishop Tuff (2)
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Blackwater Draw Formation (1)
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Irvingtonian (1)
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Lake Missoula (9)
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lower Pleistocene (3)
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middle Pleistocene (1)
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upper Pleistocene
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Rancholabrean (1)
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Weichselian
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upper Weichselian
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Younger Dryas (1)
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Wisconsinan
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upper Wisconsinan (2)
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-
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upper Quaternary (12)
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Saugus Formation (3)
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Siwalik System (2)
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Tertiary
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Arikareean (3)
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Calipuy Group (1)
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Challis Volcanics (6)
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John Day Formation (3)
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Lincoln Creek Formation (1)
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lower Tertiary
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Taishu Group (1)
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middle Tertiary
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Soda Lake Shale Member (1)
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Neogene
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Deschutes Formation (1)
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Miocene
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Astoria Formation (1)
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Columbia River Basalt Group (32)
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Grande Ronde Basalt (6)
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lower Miocene
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Burdigalian (1)
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Hemingfordian (1)
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middle Miocene (5)
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Paintbrush Tuff (1)
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Picture Gorge Basalt (1)
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Saddle Mountains Basalt (4)
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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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Modelo Formation (1)
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Puente Formation (1)
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Santa Cruz Mudstone (1)
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Tortonian (1)
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Wanapum Basalt (2)
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Yakima Basalt (1)
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Pliocene
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lower Pliocene (4)
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upper Pliocene (2)
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-
Ringold Formation (2)
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upper Neogene (1)
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Paleogene
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Calvert Bluff Formation (1)
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Duchesne River Formation (1)
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Eocene
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Absaroka Supergroup (2)
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Bridger Formation (1)
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Chuckanut Formation (1)
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Chumstick Formation (1)
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Clarno Formation (2)
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Crescent Formation (1)
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Green River Formation (1)
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Lake Gosiute (1)
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lower Eocene
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Willwood Formation (1)
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Ypresian
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London Clay (1)
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-
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middle Eocene
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Lutetian (3)
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Tyee Formation (1)
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upper Eocene
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Cowlitz Formation (1)
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Tejon Formation (1)
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Uinta Formation (1)
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-
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lower Paleogene (1)
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Oligocene
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Brule Formation (1)
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lower Oligocene (3)
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upper Oligocene (1)
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Paleocene
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lower Paleocene
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K-T boundary (2)
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Puercan (1)
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upper Paleocene
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Thanetian (1)
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Tiffanian (1)
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-
-
Paleocene-Eocene Thermal Maximum (1)
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Refugian (1)
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Sespe Formation (1)
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Wilcox Group (2)
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upper Tertiary (2)
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Vaqueros Formation (1)
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upper Cenozoic
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Pico Formation (1)
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-
-
Lake Bonneville (2)
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Mesozoic
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Condrey Mountain Schist (2)
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Cretaceous
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Comanchean
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Buda Limestone (1)
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Lower Cretaceous
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Albian
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upper Albian (2)
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Aptian (3)
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Barremian (1)
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Cloverly Formation (1)
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McMurray Formation (1)
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Mowry Shale (1)
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-
Middle Cretaceous (5)
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Upper Cretaceous
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Buda Limestone (1)
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Campanian (2)
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Cenomanian (3)
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Cody Shale (1)
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Frontier Formation (1)
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Gulfian
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Aguja Formation (1)
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Eagle Ford Formation (1)
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-
Izumi Group (1)
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K-T boundary (2)
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Lance Formation (1)
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Maestrichtian
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upper Maestrichtian (1)
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-
Mesaverde Group (1)
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Senonian (3)
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Turonian (1)
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Tuscaloosa Formation (1)
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-
-
Franciscan Complex (6)
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Glen Canyon Group (1)
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Great Valley Sequence (6)
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Jurassic
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-