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infrared stimulated luminescence (2)
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K/Ar (8)
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lichenometry (1)
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Lu/Hf (1)
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Nd/Nd (1)
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optically stimulated luminescence (6)
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paleomagnetism (12)
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Pb/Pb (1)
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Rb/Sr (1)
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tephrochronology (4)
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Th/U (2)
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thermochronology (3)
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thermoluminescence (1)
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tree rings (10)
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U/Pb (27)
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geologic age
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Cenozoic
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Bronze Age (1)
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Iron Age (1)
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middle Cenozoic (1)
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Quaternary
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Cordilleran ice sheet (2)
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Holocene
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lower Holocene (6)
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Middle Ages (2)
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middle Holocene (3)
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Neoglacial
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Little Ice Age (1)
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upper Holocene
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Little Ice Age (1)
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Pleistocene
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Illinoian (1)
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Lake Missoula (1)
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lower Pleistocene
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Gelasian (1)
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middle Pleistocene (2)
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upper Pleistocene
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Neapolitan Yellow Tuff (1)
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Tyrrhenian (1)
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Weichselian
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Loch Lomond Stade (1)
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Oldest Dryas (1)
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upper Weichselian
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Older Dryas (1)
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Younger Dryas (5)
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Wisconsinan
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upper Wisconsinan
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Fraser Glaciation (2)
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upper Quaternary
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Bull Lake Glaciation (1)
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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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Arikaree Group (1)
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Challis Volcanics (1)
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Neogene
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Bidahochi Formation (1)
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Miocene
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Columbia River Basalt Group (4)
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Grande Ronde Basalt (1)
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lower Miocene
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Aquitanian (1)
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Burdigalian (1)
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middle Miocene (2)
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Saddle Mountains Basalt (1)
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upper Miocene
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Puente Formation (1)
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Wanapum Basalt (1)
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Ogallala Formation (1)
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Pliocene
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upper Pliocene
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Piacenzian (1)
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upper Neogene (1)
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Paleogene
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Eocene
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Bridger Formation (1)
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Chumstick Formation (3)
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Crescent 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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middle Eocene
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Laney Shale Member (1)
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Tyee Formation (1)
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Swauk Formation (3)
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upper Eocene (2)
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Wilkins Peak Member (1)
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Oligocene
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upper Oligocene (4)
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Paleocene (1)
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upper Tertiary (1)
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upper Cenozoic (4)
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Lake Bonneville (2)
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Laurentide ice sheet (3)
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Mesozoic
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Cretaceous
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Colorado Group (1)
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Comanchean
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Travis Peak Formation (1)
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Lower Cretaceous
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Agrio Formation (1)
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Albian (2)
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Barremian (1)
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Blake-Bahama Formation (1)
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Burro Canyon Formation (1)
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Cloverly Formation (1)
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Hauterivian (1)
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McMurray Formation (3)
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Spirit River Formation (2)
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Travis Peak Formation (1)
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Valanginian (2)
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Zubair Formation (1)
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Lower Greensand (1)
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Mancos Shale (1)
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Upper Cretaceous
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Campanian (1)
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Cardium Formation (1)
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Cenomanian
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upper Cenomanian (1)
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Ferron Sandstone Member (4)
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Gallup Sandstone (1)
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Maestrichtian (1)
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Mesaverde Group (1)
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Senonian (2)
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Tuolumne Intrusive Suite (2)
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Turonian (1)
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Two Medicine Formation (1)
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Viking Formation (1)
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Glen Canyon Group (2)
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Jurassic
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Aztec Sandstone (2)
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Carmel Formation (2)
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Clarens Formation (1)
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Ferrar Group (5)
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Kirkpatrick Basalt (1)
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Lower Jurassic
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Toarcian (1)
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Middle Jurassic
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Page Sandstone (2)
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Norphlet Formation (2)
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San Rafael Group (1)
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Upper Jurassic
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Arab Formation (1)
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Morrison Formation (1)
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Oxfordian (1)
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Portlandian (1)
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Smackover Formation (1)
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Sundance Formation (1)
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Tithonian (1)
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Kayenta Formation (1)
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Navajo Sandstone (10)
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Nugget Sandstone (1)
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Triassic
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Hawkesbury Sandstone (1)
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Moenkopi Formation (3)
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Upper Triassic
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Chinle Formation (2)
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Petrified Forest Member (1)
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Wingate Sandstone (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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Bonanza King Formation (1)
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Carrara Formation (1)
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Lower Cambrian (2)
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Middle Cambrian
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Bright Angel Shale (1)
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Burgess Shale (1)
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Upper Cambrian
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Potsdam Sandstone (1)
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Carboniferous
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Lower Carboniferous (1)
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Mississippian
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Borden Group (1)
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Lower Mississippian
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Pocono Formation (1)
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Upper Mississippian
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Meramecian
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Saint Louis Limestone (1)
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Sainte Genevieve Limestone (2)
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Salem Limestone (1)
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Valmeyeran (1)
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Namurian (1)
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Pennsylvanian
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Conemaugh Group (2)
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Lower Pennsylvanian
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Crab Orchard Mountains Group (1)
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Gizzard Group (1)
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Middle Pennsylvanian
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Allegheny Group (2)
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Atokan (1)
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Desmoinesian (1)
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Minturn Formation (1)
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Monongahela Group (2)
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Upper Carboniferous (1)
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Casper Formation (1)
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Devonian
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Middle Devonian
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Prairie Evaporite (2)
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Old Red Sandstone (1)
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Slave Point Formation (1)
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Upper Devonian
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Frasnian (1)
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Dunkard Group (2)
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lower Paleozoic (2)
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Ordovician
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Ely Springs Dolomite (1)
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Lower Ordovician
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Arenigian (1)
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Upper Ordovician
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Ashgillian (1)
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Caradocian (1)
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Katian (1)
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Permian
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Guadalupian (1)
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Kaibab Formation (3)
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Khuff Formation (2)
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Lower Permian
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Leman Sandstone Formation (1)
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Wolfcampian (1)
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Rotliegendes (4)
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Unayzah Formation (1)
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Upper Permian
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Kazanian (1)
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Tatarian (1)
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Zechstein (1)
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Sauk Sequence (2)
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Silurian
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Lower Silurian
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Llandovery (1)
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Wenlock (1)
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Upper Silurian
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Ludlow (1)
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Pridoli (1)
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upper Paleozoic (1)
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Phanerozoic (7)
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Precambrian
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Adirondack Anorthosite (1)
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Archean
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Mesoarchean (1)
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Neoarchean (4)
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Paleoarchean (1)
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Hadean (2)
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Johnnie Formation (1)
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Kingston Peak Formation (1)
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Pahrump Series (1)
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Stillwater Complex (1)
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upper Precambrian
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Proterozoic
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Algonkian
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Baraboo Quartzite (1)
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Huronian (1)
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Lewisian (1)
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Mesoproterozoic (2)
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Neoproterozoic
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Moinian (1)
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Paleoproterozoic (5)
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igneous rocks
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extrusive rocks (1)
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igneous rocks
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carbonatites (2)
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kimberlite (3)
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peperite (1)
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plutonic rocks
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anorthosite (1)
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diabase (1)
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gabbros (2)
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granites
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felsite (1)
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leucogranite (2)
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granodiorites (3)
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ijolite (1)
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pegmatite (1)
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ultramafics
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peridotites (1)
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pyroxenite (2)
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porphyry
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vitrophyre (1)
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volcanic rocks
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adakites (1)
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andesites (10)
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basalts
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alkali basalts
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trachybasalts (1)
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flood basalts (6)
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mid-ocean ridge basalts (1)
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ocean-island basalts (1)
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tholeiite (2)
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basanite (1)
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dacites (6)
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glasses
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pitchstone (1)
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komatiite (3)
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nephelinite (1)
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phonolites (1)
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pyroclastics
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hyaloclastite (2)
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ignimbrite (12)
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pumice (7)
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scoria (5)
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tuff (11)
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rhyodacites (2)
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rhyolites (7)
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trachyandesites (1)
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trachytes (2)
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vitrophyre (1)
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-
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ophiolite (1)
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volcanic ash (3)
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metamorphic rocks
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metamorphic rocks
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gneisses
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augen gneiss (2)
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granite gneiss (1)
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orthogneiss (1)
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paragneiss (1)
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granulites (1)
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impactites
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impact breccia (1)
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marbles (3)
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metaigneous rocks (1)
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metasedimentary rocks
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metapelite (1)
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paragneiss (1)
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metavolcanic rocks (1)
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migmatites (2)
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mylonites
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blastomylonite (1)
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pseudotachylite (1)
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quartzites (2)
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schists
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greenstone (1)
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slates (1)
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ophiolite (1)
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turbidite (10)
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-
meteorites