Garrard Siltstone

Garrard Siltstone
Stratigraphic range: Ordovician
TypeFormation
UnderliesCalloway Creek Formation
OverliesClays Ferry Formation
Location
RegionSoutheastern United States
CountryUnited States
ExtentKentucky

The Garrard Siltstone is a geologic formation in Kentucky. It dates back to the Ordovician period .