| Montana Group | |
|---|---|
| Stratigraphic range: Cretaceous | |
| Type | Group |
| Location | |
| Region | South Dakota |
| Country | United States |
The Montana Group is a geologic group in South Dakota. It preserves fossils dating back to the Cretaceous period.
 | This article about a specific stratigraphic formation in South Dakota is a stub. You can help Wikipedia by expanding it. |
 | This article related to the Cretaceous period is a stub. You can help Wikipedia by expanding it. |
