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middle Miocene (6)
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Saddle Mountains Basalt (2)
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upper Miocene
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Puente Formation (1)
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Punchbowl Formation (1)
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Valentine Formation (1)
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Wanapum Basalt (1)
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Yakima Basalt (1)
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-
Ogallala Formation (1)
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Pliocene
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Cimmerian (1)
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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 (1)
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Paleogene
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Claron Formation (1)
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Duchesne River Formation (1)
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Eocene
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Bridger Formation (2)
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Bridgerian (1)
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Green River Formation (4)
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Lake Gosiute (1)
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lower Eocene
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Wasatchian (1)
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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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-
Mission Valley Formation (1)
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upper Eocene
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Tejon Formation (1)
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Uinta Formation (1)
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-
Wilkins Peak Member (1)
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-
Hanna Formation (3)
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lower Paleogene (1)
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Oligocene (11)
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Paleocene
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Clayton Formation (1)
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lower Paleocene
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Danian (2)
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K-T boundary (1)
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Puercan (1)
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Torrejonian (1)
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-
Midway Group (1)
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Nacimiento Formation (1)
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Tongue River 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 (2)
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-
-
Paleocene-Eocene Thermal Maximum (1)
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Sespe Formation (2)
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Wasatch Formation (2)
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Wilcox Group (1)
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-
upper Tertiary (1)
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-
upper Cenozoic (2)
-
-
Lake Bonneville (7)
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Laurentide ice sheet (4)
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Mesozoic
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Cretaceous
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Colorado Group (2)
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Comanchean
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Comanche Peak Limestone (1)
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Glen Rose Formation (1)
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Pearsall Formation (1)
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Trinity Group (1)
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-
Dakota Formation (6)
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Kuskokwim Group (1)
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Lower Cretaceous
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Albian
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upper Albian (1)
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-
Aptian (3)
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Bear River Formation (2)
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Bluesky Formation (1)
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Cedar Mountain Formation (1)
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Clearwater Formation (1)
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Comanche Peak Limestone (1)
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Glen Rose Formation (1)
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Hosston Formation (1)
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Kiowa Formation (1)
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Mannville Group (1)
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McMurray Formation (1)
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Mowry Shale (2)
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Muddy Sandstone (2)
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Pearsall Formation (1)
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Skull Creek Shale (1)
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Sligo Formation (1)
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Trinity Group (1)
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Wealden (1)
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-
Lower Greensand (1)
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Mancos Shale (4)
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Upper Cretaceous
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Almond Formation (2)
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Bearpaw Formation (1)
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Blackhawk Formation (5)
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Bridge Creek Limestone Member (1)
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Campanian
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lower Campanian (1)
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upper Campanian (2)
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-
Carlile Shale (1)
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Castlegate Sandstone (5)
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Cenomanian
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Dunvegan Formation (1)
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-
Coker Formation (1)
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Eutaw Formation (2)
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Ferron Sandstone Member (2)
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Frontier Formation (4)
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Greenhorn Limestone (1)
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Gulfian
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Aguja Formation (2)
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Eagle Ford Formation (2)
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Taylor Marl (1)
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-
Hell Creek Formation (1)
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Horseshoe Canyon Formation (3)
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Javelina Formation (3)
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Kaiparowits Formation (1)
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K-T boundary (1)
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Lameta Formation (1)
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Laramie Formation (1)
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Lewis Shale (1)
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Maestrichtian (5)
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Mesaverde Group (3)
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Middendorf Formation (1)
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Moreno Formation (1)
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Niobrara Formation (1)
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Ojo Alamo Sandstone (1)
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Pierre Shale (2)
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Santonian (1)
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Senonian (6)
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Star Point Sandstone (2)
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Straight Cliffs Formation (2)
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Tropic Shale (1)
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Tuolumne Intrusive Suite (1)
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Turonian
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middle Turonian (1)
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-
Wahweap Formation (3)
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-
Viking Formation (1)
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Whitemud Formation (1)
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-
Franciscan Complex (2)
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Glen Canyon Group (1)
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Great Valley Sequence (1)
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Jurassic
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Carmel Formation (2)
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Coast Range Ophiolite (1)
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Lower Jurassic
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Hettangian (1)
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lower Liassic (1)
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middle Liassic (1)
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Pliensbachian (1)
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Toarcian (1)
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upper Liassic (1)
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-
Middle Jurassic (1)
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San Rafael Group (1)
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Upper Jurassic
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Buckner Formation (1)
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Entrada Sandstone (2)
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Morrison Formation (3)
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Smackover Formation (2)
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Sundance Formation (1)
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Swift Formation (1)
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Tithonian (1)
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-
-
Navajo Sandstone (10)
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Orocopia Schist (1)
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Triassic
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Lower Triassic (1)
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Moenkopi Formation (1)
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Upper Triassic
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Chinle Formation (6)
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Norian (1)
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Rhaetian (2)
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-
-
Vaca Muerta Formation (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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MIS 6 (1)
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MIS 7 (1)
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Paleozoic
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Berea Sandstone (1)
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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
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Poleta Formation (1)
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Zabriskie Quartzite (1)
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-
Upper Cambrian
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Goldenville Formation (1)
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-
-
Carboniferous
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Amsden Formation (2)
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Jackfork Group (1)
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Johns Valley Formation (1)
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Mississippian
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Barnett Shale (1)
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Leadville Formation (1)
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Lower Mississippian
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Lodgepole Formation (2)
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Pocono Formation (1)
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-
Madison Group (5)
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Mission Canyon Limestone (2)
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Stanley Group (1)
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Upper Mississippian
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Chesterian (4)
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Greenbrier Limestone (1)
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Hartselle Sandstone (1)
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Heath Formation (1)
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Meramecian
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Salem Limestone (2)
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-
Parkwood Formation (1)
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-
Valmeyeran (1)
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-
Pennsylvanian
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Conemaugh Group (1)
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Cumberland Group (1)
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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 (1)
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Atokan
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Atoka Formation (2)
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-
Desmoinesian (1)
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Moscovian (1)
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Paradox Formation (1)
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-
Monongahela Group (1)
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Upper Pennsylvanian
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Kasimovian (1)
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Missourian (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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Beaverhill Lake Group (1)
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Lower Devonian
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Oriskany Sandstone (2)
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-
Middle Devonian
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Hamilton Group (1)
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Marcellus Shale (4)
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-
Muth Quartzite (1)
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Upper Devonian
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Famennian
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Wabamun Group (1)
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Frasnian (1)
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Jefferson Group (2)
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Palliser Formation (2)
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-
-
Dunkard Group (1)
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Helderberg Group (2)
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Keyser Limestone (2)
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Knox Group (1)
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lower Paleozoic
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Conococheague Formation (3)
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-
Maroon Formation (2)
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New Albany Shale (1)
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Ordovician
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Eureka Quartzite (2)
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Lower Ordovician
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El Paso Group (1)
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Tremadocian (1)
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-
Middle Ordovician
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Galena Dolomite (1)
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Platteville Formation (1)
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Simpson Group (1)
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-
Montoya Group (1)
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Upper Ordovician
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Ashgillian (1)
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Bighorn Dolomite (1)
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Hirnantian (1)
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Sandbian (1)
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-
Utica Shale (1)
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Valmy Formation (1)
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Vinini Formation (1)
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-
Permian
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Castile Formation (1)
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Guadalupian
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Bell Canyon Formation (1)
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Delaware Mountain Group (1)
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-
Lower Permian
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Leonardian
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Bone Spring Limestone (1)
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-
-
Lyons Sandstone (2)
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Meade Peak Member (1)
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Middle Permian (1)
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Phosphoria Formation (1)
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-
Sauk Sequence (2)
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Silurian
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Lower Silurian
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Llandovery (2)
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Tuscarora Formation (2)
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-
Middle Silurian
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Clinton Group (1)
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McKenzie Formation (1)
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-
Upper Silurian
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Cayugan
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Tonoloway Limestone (2)
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-
-
-
Supai Formation (2)
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Tensleep Sandstone (2)
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upper Paleozoic
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Fountain Formation (3)
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-
-
Phanerozoic (7)
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Precambrian
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Archean
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Neoarchean (1)
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-
Chuar Group (2)
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Pahrump Series (3)
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Stirling Quartzite (1)
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Uinta Mountain Group (2)
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upper Precambrian
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Proterozoic
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Isan Orogeny (1)
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Mesoproterozoic
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Belt Supergroup (1)
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-
Neoproterozoic
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Cryogenian (1)
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Ediacaran (1)
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McCoy Creek Group (1)
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Otavi Group (1)
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Sturtian (3)
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Tonian (2)
-
-
Paleoproterozoic (2)
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Pocatello Formation (1)
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Roan Supergroup (1)
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-
-
Wyman Formation (1)
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-
-
igneous rocks
-
igneous rocks
-
peperite (1)
-
plutonic rocks
-
diabase (1)
-
granites (7)
-
granodiorites (1)
-
ultramafics
-
peridotites (1)
-
pyroxenite (1)
-
-
-
porphyry (1)
-
volcanic rocks
-
andesites (6)
-
basalts
-
columnar basalt (1)
-
flood basalts (5)
-
mid-ocean ridge basalts (1)
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ocean-island basalts (2)
-
-
dacites (4)
-
glasses
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obsidian (1)
-
volcanic glass (2)
-
-
pyroclastics
-
ash-flow tuff (2)
-
hyaloclastite (1)
-
ignimbrite (7)
-
pumice (1)
-
scoria (1)
-
tuff (10)
-
tuffite (1)
-
-
rhyolites (5)
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-
-
ophiolite (3)
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volcanic ash (3)
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-