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Cambrian - Deadwood formation (1) |
Carboniferous - Minnekahta limestone; Opeche formation; Minnelusa sandstone; Pahasapa limestone (1) |
Cretaceous - Pierre shale; Niobrara formation; Carlile formation; Greenhorn limestone; Graneros shale; Dakota sandstone; Fuson formation; Lakota formation; Morrison formation (1) |
Geology -- South Dakota -- Maps (1) |
Geology -- United States --Maps (1) |
Geology -- Wyoming -- Maps (1) |
Jurassic - Sundance formation (1) |
Neogene - unnamed strata (1) |
Ordovician - Whitewood limestone (1) |
Paleogene - unnamed strata (1) |