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The Grant Lake Formation is a geologic formation in Ohio and Kentucky. It preserves fossils dating back to the Ordovician period.

Grant Lake Formation
Stratigraphic range: Late Ordovician
Grant Lake Formation Kentucky.JPG
Grant Lake Formation exposed in Boone County, Kentucky.
UnderliesArnheim Formation and Bull Fork Formation
OverliesFairview Formation
Region Ohio Kentucky
Country United States

See alsoEdit


  • Various Contributors to the Paleobiology Database. "Fossilworks: Gateway to the Paleobiology Database". Archived from the original on 31 July 2014. Retrieved 22 June 2014.