Thunder Bay Limestone | |
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Stratigraphic range: | |
Type | Geological formation |
Unit of | Traverse Group[1] |
Sub-units | Partidge Point Member, Potter Farm Member, and Norway Point Member |
Underlies | Kettle Point Formation and Squaw Bay Limestone |
Overlies | Potter Farm Formation[1] |
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.