Geologic formation in Michigan
Alpena Formation |
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Stratigraphic range: Middle Devonian |
Type | Formation |
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Unit of | Traverse Group |
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Sub-units | Four Mile Dam Member and Newton Creek Member |
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Underlies | Thunder Bay Limestone |
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Overlies | Long Lake Limestone |
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Location |
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Region | Michigan |
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Country | United States |
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The Alpena Formation is a geologic formation in Michigan. It preserves fossils dating back to the Devonian period.
- Earth sciences portal
- Michigan portal
- Paleontology portal
References
- Various Contributors to the Paleobiology Database. "Fossilworks: Gateway to the Paleobiology Database". Retrieved 17 December 2021.
Chronostratigraphy of Michigan
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Mz | |
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Pz | C | ⁋ | - Grand River Formation
- Saginaw Formation
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