Orchard Creek Shale
From Wikipedia, the free encyclopedia
| Orchard Creek Shale | |
|---|---|
| Stratigraphic range: Ordovician | |
| Type | Formation |
| Location | |
| Region | Illinois |
| Country | United States |
The Orchard Creek Shale is a geologic formation in Illinois. It preserves fossils dating back to the Ordovician period.
