| Olentangy Shale | |
| Type: | Formation |
| Age: | Late Devonian |
| Period: | Late Devonian |
| Underlies: | Ohio Shale |
| Overlies: | Hillsboro Sandstone and Tymochtee Dolomite |
The Olentangy Shale is a geologic formation in Ohio. It preserves fossils dating back to the Devonian period.