Alpena Formation
| Alpena Formation Stratigraphic range: Devonian | |
|---|---|
| Type | Formation |
| Location | |
| Region |
 Michigan |
| Country |
 United States |
The Alpena Formation 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". Retrieved 22 June 2014.