Greyson Shale
From Wikipedia, the free encyclopedia
| Greyson Shale | |
|---|---|
| Stratigraphic range: Precambrian | |
| Type | Formation |
| Unit of | Missoula Group[1] |
| Location | |
| Region | Montana |
| Country | United States |
The Greyson Shale is a geologic formation in Montana. It preserves fossils.[2]
