Grand Detour Formation

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

Last updated July 12, 2025

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

References

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

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Grand Detour Formation

See also

References