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middle Quaternary (1)
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Pleistocene
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Bishop Tuff (1)
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Glasford Formation (1)
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Lake Agassiz (1)
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Lake Algonquin (1)
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Loveland Loess (1)
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Matuyama Chron (2)
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Miami Limestone (1)
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Peoria Loess (1)
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upper Pleistocene
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Wisconsinan (3)
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Wurm (1)
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Wedron Formation (1)
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upper Quaternary
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Brunhes Chron (3)
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Tertiary
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Arikaree Group (1)
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lower Tertiary (1)
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Neogene
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Capistrano Formation (1)
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Miocene
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Columbia River Basalt Group (1)
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lower Miocene (4)
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middle Miocene (1)
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Paintbrush Tuff (1)
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upper Miocene
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Puente Formation (1)
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Pliocene
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upper Pliocene (1)
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Sisquoc Formation (1)
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Paleogene
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Chadron Formation (1)
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Eocene
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Green River Formation (6)
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lower Eocene
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Willwood Formation (1)
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middle Eocene
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Yegua Formation (1)
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Parachute Creek Member (1)
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upper Eocene (2)
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Oligocene
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Brule Formation (1)
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Fish Canyon Tuff (1)
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Fontainebleau Sandstone (2)
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Frio Formation (3)
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lower Oligocene (2)
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middle Oligocene (2)
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Vicksburg Group (2)
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Paleocene
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lower Paleocene
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Danian (1)
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upper Paleocene (1)
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White River Group (1)
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Wilcox Group (3)
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Shahejie Formation (1)
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Twin Sisters Dunite (1)
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upper Cenozoic
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Pico Formation (1)
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Tamiami Formation (1)
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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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Buda Limestone (2)
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Travis Peak Formation (2)
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Dakota Formation (1)
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Graneros Shale (1)
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Lower Cretaceous
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Albian (5)
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Aptian (3)
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Barremian (1)
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Bluesky Formation (1)
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Gething Formation (1)
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Mannville Group (3)
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McMurray Formation (2)
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Spirit River Formation (2)
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Thamama Group (1)
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Torok Formation (1)
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Travis Peak Formation (2)
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Macae Formation (1)
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Mancos Shale (2)
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Nanushuk Group (2)
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Qingshankou Formation (1)
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Upper Cretaceous
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Buda Limestone (2)
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Campanian (1)
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Cenomanian (1)
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Codell Sandstone Member (1)
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Colville Group (1)
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Ferron Sandstone Member (1)
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Fort Hays Limestone Member (1)
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Frontier Formation (1)
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Greenhorn Limestone (1)
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Gulfian
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Austin Chalk (2)
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Austin Group (1)
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Eagle Ford Formation (8)
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Olmos Formation (1)
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Kirtland Shale (1)
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Lance Formation (1)
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Maestrichtian (1)
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Mesaverde Group (1)
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Niobrara Formation (2)
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Pakawau Group (1)
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Pierre Shale (3)
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Price River Formation (1)
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Tuscaloosa Formation (1)
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-
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Franciscan Complex (1)
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Great Valley Sequence (1)
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Jurassic
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Heather Formation (1)
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Kingak Shale (1)
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Lower Jurassic (3)
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Middle Jurassic
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Bajocian
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Brent Group (1)
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Etive Formation (2)
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Ness Formation (1)
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Rannoch Formation (1)
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Callovian (1)
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Page Sandstone (1)
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Opalinus Clay (3)
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Posidonia Shale (1)
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Upper Jurassic
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Bowser Lake Group (1)
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Cotton Valley Group (3)
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Entrada Sandstone (2)
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Haynesville Formation (2)
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Kimmeridge Clay (2)
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Kimmeridgian (1)
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Morrison Formation (1)
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Oxfordian (2)
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Smackover Formation (3)
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Navajo Sandstone (6)
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Nugget Sandstone (2)
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Triassic
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Lower Triassic (2)
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Red Peak Formation (1)
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Sherwood Sandstone (2)
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Upper Triassic
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Keuper (2)
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Luning Formation (1)
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Yanchang Formation (2)
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Yanshanian (1)
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Paleozoic
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Arbuckle Group (1)
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Bedford Shale (1)
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Berea Sandstone (4)
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Cambrian
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Conasauga Group (1)
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Lower Cambrian (2)
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Mount Read Volcanics (1)
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Upper Cambrian
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Galesville Sandstone (1)
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Carboniferous
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Albert Formation (1)
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Jackfork Group (1)
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Lower Carboniferous
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Dinantian (2)
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Mississippian
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Barnett Shale (7)
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Lower Mississippian
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Kinderhookian
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Banff Formation (1)
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Lodgepole Formation (1)
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Madison Group (5)
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Middle Mississippian
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Visean (2)
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Mission Canyon Limestone (3)
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Stanley Group (1)
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Sunbury Shale (1)
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Windsor Group (1)
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Pennsylvanian
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Cumberland Group (1)
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Middle Pennsylvanian
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Breathitt Formation (1)
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Desmoinesian
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Cherokee Group (1)
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Hartshorne Sandstone (1)
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Marmaton Group (1)
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Kanawha Formation (1)
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Paradox Formation (1)
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Morrow Formation (2)
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Upper Pennsylvanian
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Canyon Group (1)
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Upper Carboniferous
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Westphalian (1)
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Chattanooga Shale (1)
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Devonian
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Keg River Formation (1)
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Lower Devonian
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Oriskany Sandstone (1)
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Middle Devonian
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Mahantango Formation (1)
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Marcellus Shale (4)
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Onondaga Limestone (1)
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Winnipegosis Formation (1)
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Millboro Shale (1)
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Upper Devonian
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Duperow Formation (1)
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Huron Member (1)
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Nisku Formation (1)
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Ohio Shale (1)
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Exshaw Formation (1)
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Horton Group (1)
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Knox Group (1)
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Lisburne Group (1)
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lower Paleozoic (1)
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Minnelusa Formation (2)
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New Albany Shale (1)
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Ordovician
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Lower Ordovician
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Ellenburger Group (2)
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Middle Ordovician
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Cloridorme Formation (1)
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Saint Peter Sandstone (3)
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Simpson Group (1)
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Trenton Group (2)
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Upper Ordovician
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Red River Formation (2)
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Trentonian (2)
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Wufeng Formation (1)
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Yeoman Formation (1)
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Utica Shale (1)
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Permian
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Guadalupian
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Capitan Formation (1)
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Queen Formation (1)
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Lower Permian
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Wolfcampian (1)
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Unayzah Formation (2)
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Upper Permian (4)
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Silurian
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Lower Silurian (1)
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Middle Silurian
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Clinton Group (1)
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Upper Silurian
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Cayugan
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Tonoloway Limestone (1)
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Tensleep Sandstone (2)
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upper Paleozoic
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Bakken Formation (2)
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Woodford Shale (3)
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Phanerozoic (3)
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Precambrian
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Adirondack Anorthosite (1)
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Archean
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Amisk Group (1)
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Paleoarchean (1)
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Yellowknife Group (1)
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Missi Group (1)
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Nipissing Diabase (1)
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Stillwater Complex (2)
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upper Precambrian
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Proterozoic
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Isan Orogeny (1)
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Keweenawan
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Copper Harbor Conglomerate (1)
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Mesoproterozoic
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Helikian (1)
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Neoproterozoic
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Doushantuo Formation (1)
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Paleoproterozoic
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Aphebian (1)
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Sinian
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Doushantuo Formation (1)
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igneous rocks
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extrusive rocks (1)
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igneous rocks
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carbonatites (5)
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kimberlite (6)
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plutonic rocks
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alnoite (1)
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anorthosite (4)
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diabase (4)
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diorites
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quartz diorites (1)
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tonalite (1)
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trondhjemite (1)
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gabbros
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norite (2)
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granites
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aplite (2)
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charnockite (1)
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leucogranite (1)
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micropegmatite (1)
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rapakivi (1)
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two-mica granite (1)
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granodiorites (2)
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lamprophyres (1)
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pegmatite (24)
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syenites
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nepheline syenite (3)
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ultramafics
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peridotites
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dunite (5)
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spinel peridotite (1)
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pyroxenite (3)
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-
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porphyry (6)
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volcanic rocks
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andesites
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andesite porphyry (1)
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basalts
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alkali basalts
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alkali olivine basalt (1)
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trachybasalts (1)
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flood basalts (1)
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tholeiite (1)
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dacites (4)
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glasses
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obsidian (2)
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palagonite (1)
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volcanic glass (4)
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limburgite (1)
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phonolites
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tinguaite (1)
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pyroclastics
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