The Au Train Formation is a geologic formation in Michigan. It preserves fossils dating back to the Ordovician period.
See also
References
- Various Contributors to the Paleobiology Database. "Fossilworks: Gateway to the Paleobiology Database". Retrieved 17 December 2021.
- Pictured Rocks: Geologic Formations|url=http://www.nps.gov/piro/naturescience/geologicformations.htm%7Cpublisher=US National Park Service|accessdate=June 14, 2020
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