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| Cambrian - Deadwood formation (1) |
| Carboniferous - Minnekahta limestone; Opeche formation; Minnelusa sandstone; Pahasapa limestone; Englewood limestone (1) |
| Cretaceous - Carlile formation; Greenhorn limestone; Graneros shale; Dakota sandstone; Fuson formation; Lakota sandstone; Morrison shale (1) |
| Geology -- South Dakota -- Lawrence County -- Maps (1) |
| Geology -- South Dakota -- Pennington County -- Maps (1) |
| Geology -- United States --Maps (1) |
| Geology -- Wyoming -- Crook County -- Maps (1) |
| Geology -- Wyoming -- Weston County -- Maps (1) |
| Groundwater -- South Dakota -- Lawrence County -- Maps (1) |
| Groundwater -- South Dakota -- Pennington County -- Maps (1) |