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Carboniferous - Minnekahta limestone; Opeche formaltion; Minnelusa sandstone (1) |
Cretaceous - Pierre shale; Niobrara formation; Carlile shale; Greenhorn limestone; Graneros shale; Dakota sandstone; Fuson formation; Minnewaste limestone; Lakota formation (1) |
Geology -- United States --Maps (1) |
Geology--Nebraska--Dawes County--Maps (1) |
Geology--South Dakota--Maps (1) |
Jurassic - Unkpapa sandstone; Sundance formation; Spearfish shale (1) |
Neogene - Terrace conglomerate (1) |
Paleogene - Brule clay; Chadron sand (1) |
Triassic - - Unkpapa sandstone; Sundance formation; Spearfish shale (1) |