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| Archean - unnamed strata (1) |
| Cambrian - Gallatin formation; Flathead formation (1) |
| Carboniferous - Quadrant formation; Madison limestone (1) |
| Cretaceous - Laramie formation; Montana formation; Colorado formation; Dakota formation; Livingston formation (1) |
| Devonian - Three Forks shale; Jefferson limestone (1) |
| Geology -- Montana -- Maps (1) |
| Geology -- Montana -- Three Forks (1) |
| Geology -- United States --Maps (1) |
| Jurassic - Ellis formation (1) |
| Neogene - Bozeman lake-beds (1) |