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upper Cenozoic
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Mesozoic
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Lower Cretaceous
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Jurassic
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Navajo Sandstone (1)
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Paleozoic
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Upper Mississippian
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Saint Louis Limestone (1)
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Windsor Group (1)
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Pennsylvanian
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Lower Pennsylvanian
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Middle Pennsylvanian
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Atokan (2)
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Upper Pennsylvanian
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Devonian
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Ponta Grossa Formation (1)
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Upper Devonian
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Duperow Formation (2)
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upper Famennian (1)
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Waterways Formation (1)
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Endicott Group (1)
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Hanson Creek Formation (1)
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lower Paleozoic
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Conococheague Formation (1)
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Minnelusa Formation (3)
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New Albany Shale (1)
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Ordovician
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Eureka Quartzite (1)
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Beekmantown Group (1)
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Martinsburg Formation (1)
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Middle Ordovician
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Upper Ordovician
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Maquoketa Formation (1)
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Queenston Shale (1)
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Trentonian (3)
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Viola Limestone (1)
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Permian
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Bell Canyon Formation (1)
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Delaware Mountain Group (1)
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Grayburg Formation (1)
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Hutchinson Salt Member (1)
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Kaibab Formation (2)
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Khuff Formation (1)
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Lower Permian
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Cherry Canyon Formation (1)
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Lyons Sandstone (1)
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Stone Corral Formation (2)
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Unayzah Formation (1)
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Upper Permian
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Permian-Triassic boundary (1)
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Zechstein (1)
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Wellington Formation (1)
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Silurian
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Fusselman Dolomite (1)
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Lower Silurian
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Llandovery
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Interlake Formation (1)
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Middle Silurian
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Niagaran (1)
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Cayugan (1)
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upper Paleozoic
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Antrim Shale (1)
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Wells Formation (1)
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Phanerozoic (3)
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Precambrian
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Proterozoic
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porphyry (7)
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ophiolite (2)
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ophiolite (2)
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minerals
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borates
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sorosilicates
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ring silicates
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Primary terms
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Africa
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