Grand Detour Formation

The Grand Detour Formation is a geologic formation in Illinois. It preserves fossils dating back to the Ordovician period.

Grand Detour Formation
Stratigraphic range: Ordovician
TypeFormation
Location
Region Illinois
Country United States

See also

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References

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  • Various Contributors to the Paleobiology Database. "Fossilworks: Gateway to the Paleobiology Database". Archived from the original on 25 March 2022. Retrieved 17 December 2021.