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Mg/Ca (1)
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-
magnesium
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Mg/Ca (1)
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-
strontium
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Sr-87/Sr-86 (15)
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-
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aluminum
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Al-26 (20)
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antimony (1)
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arsenic (11)
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bismuth (2)
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chromium (1)
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cobalt (1)
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copper (5)
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gold (8)
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indium (2)
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iron
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ferric iron (1)
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lead
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Pb-206/Pb-204 (4)
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Pb-207/Pb-204 (2)
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Pb-207/Pb-206 (1)
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Pb-208/Pb-204 (2)
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Pb-208/Pb-206 (1)
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mercury (5)
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molybdenum (2)
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nickel (2)
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niobium (2)
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platinum group
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iridium ores (1)
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osmium ores (1)
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palladium ores (3)
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platinum (2)
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platinum ores (11)
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rhodium ores (1)
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ruthenium (1)
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ruthenium ores (1)
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rare earths
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cerium (1)
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neodymium
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Nd-144/Nd-143 (3)
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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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-
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rhenium (1)
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silver (2)
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tantalum (1)
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tin (3)
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titanium (1)
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tungsten (2)
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vanadium (1)
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zinc (3)
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nitrogen
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organic nitrogen (1)
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noble gases
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argon
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Ar-40/Ar-39 (1)
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helium
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He-4/He-3 (2)
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neon
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Ne-21 (1)
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radon
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Rn-222 (2)
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-
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oxygen
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O-18/O-16 (12)
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phosphorus (2)
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selenium (2)
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silicon (1)
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sulfur
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S-34/S-32 (7)
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tellurium (2)
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trace metals (3)
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-
fossils
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bacteria (3)
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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
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Salmoniformes (1)
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Tetrapoda
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Mammalia (1)
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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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Brachiopoda (1)
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Cnidaria
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Anthozoa (2)
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Echinodermata
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Echinozoa
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Echinoidea (1)
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-
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Protista
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Foraminifera (3)
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-
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microfossils
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Chitinozoa (2)
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Conodonta (1)
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palynomorphs
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acritarchs (2)
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Chitinozoa (2)
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miospores
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pollen (1)
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-
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Plantae
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Spermatophyta
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Angiospermae
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Dicotyledoneae
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Alnus (1)
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Leguminosae (1)
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Salix (1)
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-
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Gymnospermae
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Coniferales
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Taxodiaceae
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Sequoia (1)
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-
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geochronology methods
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(U-Th)/He (8)
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Ar/Ar (17)
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exposure age (29)
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fission-track dating (8)
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He/He (1)
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K/Ar (4)
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Lu/Hf (1)
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optical mineralogy (1)
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optically stimulated luminescence (6)
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paleomagnetism (6)
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Pb/Pb (1)
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radiation damage (1)
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Re/Os (1)
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tephrochronology (2)
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Th/U (2)
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thermochronology (10)
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thermoluminescence (1)
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tree rings (1)
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U/Pb (20)
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U/Th/Pb (2)
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uranium disequilibrium (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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lower Holocene (2)
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upper Holocene (2)
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Pleistocene
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Blackwater Draw Formation (1)
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Champlain Sea (1)
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Glasford Formation (1)
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Gunz (1)
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Illinoian (1)
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Lake Algonquin (1)
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lower Pleistocene (4)
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Roxana Silt (1)
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upper Pleistocene
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Devensian
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upper Devensian (2)
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Sangamonian (1)
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Weichselian
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upper Weichselian
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Younger Dryas (3)
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Wisconsinan
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Lavery Till (1)
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lower Wisconsinan (1)
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upper Wisconsinan (5)
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Wedron Formation (1)
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upper Quaternary
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Scandinavian ice sheet (1)
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Stone Age
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Paleolithic (1)
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Tertiary
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Asmari Formation (1)
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lower Tertiary (1)
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middle Tertiary (1)
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Neogene
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Miocene
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Astoria Formation (1)
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Columbia River Basalt Group (1)
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middle Miocene (1)
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Paintbrush Tuff (2)
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Saddle Mountains Basalt (1)
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Tiva Canyon Member (1)
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Topopah Spring Member (2)
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upper Miocene (6)
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Wanapum Basalt (1)
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Ogallala Formation (1)
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Pliocene
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lower Pliocene (2)
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middle Pliocene (1)
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Salt Lake Formation (1)
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upper Neogene (1)
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Paleogene
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Eocene
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Chuckanut Formation (1)
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Crescent Formation (1)
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lower Eocene
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Ypresian
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London Clay (1)
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middle Eocene
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Tyee Formation (1)
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upper Eocene (1)
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Oligocene (2)
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Paleocene
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middle Paleocene (1)
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-
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upper Cenozoic (2)
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Coal Measures (3)
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Lake Bonneville (1)
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Laurentide ice sheet (12)
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Mesozoic
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Cretaceous
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Dakota Formation (1)
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Lower Cretaceous
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Albian (1)
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Barremian (1)
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Bluesky Formation (1)
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Christopher Formation (1)
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Gething Formation (1)
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Hauterivian (1)
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Upper Cretaceous
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Campanian (1)
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Horseshoe Canyon Formation (1)
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Judith River Formation (1)
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Maestrichtian (1)
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Niobrara Formation (3)
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Pierre Shale (4)
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Rosario Formation (1)
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Straight Cliffs Formation (1)
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Tropic Shale (1)
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Franciscan Complex (2)
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Glen Canyon Group (1)
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Great Valley Sequence (2)
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Jurassic
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Lower Jurassic
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Toarcian (1)
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upper Liassic (1)
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Middle Jurassic
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Callovian (1)
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San Rafael Group (1)
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Upper Jurassic
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Morrison Formation (1)
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Oxfordian (2)
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McHugh Complex (1)
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Navajo Sandstone (1)
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Triassic
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Lower Triassic
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Bunter (1)
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Middle Triassic (1)
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Moenkopi Formation (1)
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Montney Formation (1)
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Nicola Group (1)
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Sherwood Sandstone (1)
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Upper Triassic
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Chinle Formation (1)
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Lockatong Formation (1)
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Mercia Mudstone (1)
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Rhaetian
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Penarth Group (1)
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MIS 2 (1)
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MIS 3 (1)
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Paleozoic
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Cambrian
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Brigham Group (1)
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Conasauga Group (1)
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Lower Cambrian (1)
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Upper Cambrian (1)
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Carboniferous
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Lower Carboniferous
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Dinantian (2)
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Mississippian
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Lower Mississippian
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Osagian
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Burlington Limestone (1)
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Keokuk Limestone (1)
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Pocono Formation (2)
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Middle Mississippian
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Visean (1)
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Upper Mississippian
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Greenbrier Limestone (1)
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Mauch Chunk Formation (2)
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Pennsylvanian
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Lower Pennsylvanian
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Bashkirian (1)
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Middle Pennsylvanian
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Carbondale Formation (1)
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Danville Coal Member (1)
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Dugger Formation (1)
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Pottsville Group (1)
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Upper Carboniferous
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Millstone Grit (1)
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Westphalian (1)
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Catskill Formation (1)
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Devonian
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Lower Devonian
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Littleton Formation (1)
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Oriskany Sandstone (1)
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Middle Devonian
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Givetian (1)
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Jeffersonville Limestone (1)
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Old Red Sandstone (1)
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Upper Devonian (1)
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Hartland Formation (1)
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Leinster Granite (1)
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lower Paleozoic
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Chopawamsic Formation (1)
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Conococheague Formation (2)
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Penobscot Formation (2)
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Manhattan Formation (1)
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middle Paleozoic (1)
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New Albany Shale (1)
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Ordovician
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Lower Ordovician
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Beekmantown Group (1)
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Martinsburg Formation (2)
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Middle Ordovician (2)
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Skiddaw Slates (1)
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Upper Ordovician
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Ashgillian (2)
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Caradocian
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Borrowdale Volcanic Group (1)
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Juniata Formation (1)
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Kope Formation (1)
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Reedsville Formation (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 (1)
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Unayzah Formation (1)
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Upper Permian
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