| Challis Volcanics | |
|---|---|
| Stratigraphic range: Paleogene | |
| Type | Formation |
| Location | |
| Region | Idaho |
| Country | United States |
The Challis Volcanics is a geologic formation in Idaho. It preserves fossils dating back to the Paleogene period.
 | This article about a specific stratigraphic formation in Idaho is a stub. You can help Wikipedia by adding missing information. |
