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| Put-in-Bay Dolomite | |
|---|---|
| Stratigraphic range: Silurian | |
| Type | Formation |
| Unit of | Bass Islands Group |
| Underlies | Raisin River Dolomite |
| Overlies | St. Ignace Dolomite |
| Location | |
| Region |  Michigan |
| Country |  United States |
The Put-in-Bay Dolomite is a geologic formation in Michigan and Ohio. It preserves fossils dating back to the Silurian period. The type locality is South Bass Island in western Lake Erie.
