| Verdigris Formation | |
|---|---|
| Stratigraphic range: Carboniferous | |
| Type | Formation |
| Location | |
| Region |  Illinois |
| Country |  United States |
The Verdigris Formation is a geologic formation that outcrops in Illinois. It preserves fossils dating back to the Carboniferous period. It is a limestone that was deposited after the Skinner Sandstone in central Oklahoma.
