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| Cambrian - Deadwood formation (1) |
| Carboniferous - Chugwater formation; Tensleep sandstone; Amsden formation; Madison limestone (1) |
| Cretaceous - Pierre shale; Colorado formation; Cloverly formation; Morrison formation; De Smet formation; Kingsbury conglomerate; Piney formation; Parkman sandstone (1) |
| Geology -- United States --Maps (1) |
| Geology -- Wyoming -- Big Horn County -- Maps (1) |
| Geology -- Wyoming -- Johnson County -- Maps (1) |
| Geology -- Wyoming -- Sheridan County -- Maps (1) |
| Jurassic - Morrison formation; Sundance formation (1) |
| Neogene - unnamed strata (1) |
| Ordovician - Bighorn limestone (1) |