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