Geologic units in Fayette county, Indiana

Dillsboro Formation (Ordovician) at surface, covers 39 % of this area

Skeletal limestone and calcareous shale

Whitewater Formation (Ordovician) at surface, covers 31 % of this area

Skeletal limestone and calcareous shale; dolomitic mudstone (S, Saluda Member) at base

Louisville Limestone through Brassfield Limestone (Silurian) at surface, covers 30 % of this area

Sexton Creek Limestone at base in Kentland area and on cross-section