Thunder Bay Limestone
The Thunder Bay Limestone is a geologic formation in Michigan. It preserves fossils dating back to the Devonian period.
| Thunder Bay Limestone | |
|---|---|
| Stratigraphic range: | |
| Type | Geological formation |
| Unit of | Traverse Group |
| Sub-units | Partidge Point Member, Potter Farm Member, and Norway Point Member |
| Underlies | Kettle Point Formation and Squaw Bay Limestone |
| Overlies | Potter Farm Formation |
| Location | |
| Region | Michigan |
| Country | United States |
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