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| Long Lake Limestone | |
|---|---|
| Stratigraphic range: Middle Devonian | |
| Type | Formation |
| Unit of | Traverse Group |
| Sub-units | Killians Member and Genshaw Member |
| Underlies | Alpena Limestone |
| Overlies | Ferron Point Formation |
| Location | |
| Region | Michigan |
| Country | United States |
The Long Lake Limestone is a geologic formation in Michigan. It preserves fossils dating back to the Devonian period.
