Thunder Bay Limestone
| Thunder Bay Limestone | |
|---|---|
| Stratigraphic range: Middle Devonian | |
| Type | 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 | Alpena Limestone |
| Location | |
| Region |  Michigan |
| Country |  United States |
The Thunder Bay Limestone is a geologic formation in Michigan. It preserves fossils dating back to the Devonian period.
References
- Various Contributors to the Paleobiology Database. "Fossilworks: Gateway to the Paleobiology Database". Archived from the original on 31 July 2014. Retrieved 22 June 2014.
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