Geologic units in Switzerland county, Indiana

Dillsboro Formation (Ordovician) at surface, covers 76 % of this area

Skeletal limestone and calcareous shale

Kope Formation (Ordovician) at surface, covers 14 % of this area

Shale and thin skeletal limestone

Lexington Limestone (Ordovician) at surface, covers 8 % of this area

Micritic and skeletal limestone

Whitewater Formation (Ordovician) at surface, covers 2 % of this area

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

Louisville Limestone through Brassfield Limestone (Silurian) at surface, covers 0.5 % of this area

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

Alluvium (Pleistocene to Holocene) at surface, covers < 0.1 % of this area

Alluvium; includes glacial deposits along the Ohio River and its tributaries west of Cannelton locks