Three Forks Shale
Geologic formation in Montana and North Dakota, United States
From Wikipedia, the free encyclopedia
The Three Forks Shale is a geologic formation in Montana and North Dakota. It preserves fossils dating back to the Devonian period.[1]
| Three Forks Shale | |
|---|---|
| Stratigraphic range: Devonian | |
| Type | Formation |
| Location | |
| Region | Montana |
| Country | United States |
