| Lilley Formation | |
|---|---|
| Stratigraphic range: Silurian | |
| Type | Formation |
| Underlies | Peebles Dolomite |
| Overlies | Bisher Formation |
| Location | |
| Region |  Ohio |
| Country |  United States |
The Lilley Formation is a geologic formation in Ohio. It preserves fossils dating back to the Silurian period.