SEDIS - Thesaurus
Beaverhead Formation  | |
|---|---|
| RT | Upper Cretaceous |
| Paleocene | |
| Eocene | |
| Idaho | |
| Montana | |
| K-T boundary | |
| SN | Upper Cretaceous, Paleocene and Eocene. Unconformably overlies Kootenay Formation, Dinwoody Formation, Thaynes Formation, Phosphoria Formation, Quadrant Quartzite and Madison Group. E central Idaho and SW Montana. Indexed with ages as applicable. |
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