| Plum Brook Shale | |
|---|---|
| Stratigraphic range: Devonian | |
| Type | Formation |
| Underlies | Prout Limestone |
| Overlies | Delaware Limestone |
| Location | |
| Region |  Ohio |
| Country |  United States |
The Plum Brook Shale is a geologic formation in Ohio. It preserves fossils dating back to the Devonian period.