Casper Formation
| Casper Formation | |
|---|---|
| Stratigraphic range: Permian | |
| Sandstones (Casper Formation) | |
| Type | Formation | 
| Location | |
| Region | Wyoming | 
| Country | United States | 
The Casper Formation is a geologic formation in Wyoming, US. It preserves fossils dating back to the Pennsylvanian period.