USGS Home
Contact USGS
Search USGS

Mineral Resources > Online Spatial Data > Geology > by state > Indiana Geology

Geologic units in Clark county, Indiana

Blue River Group (Mississippian) at surface, covers 0.6 % of this area

Blue River Group - Mostly micritic, skeletal, and oolitic limestone

Lithology: limestone

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

Dillsboro Formation - Skeletal limestone and calcareous shale

Lithology: limestone; shale

Muscatatuck Group (Devonian) at surface, covers 25 % of this area

Muscatatuck Group - Limestone and dolomite

Lithology: limestone; dolostone (dolomite)

New Albany Shale (Devonian-Mississippian) at surface, covers 28 % of this area

New Albany Shale - Black and greenish-gray shale

Lithology: black shale; shale

West Baden Group (Mississippian) at surface, covers 0.2 % of this area

West Baden Group - Shale, sandstone, and micritic and skeletal limestone

Lithology: sandstone; shale; limestone

Sanders Group (Mississippian) at surface, covers 3 % of this area

Sanders Group - Mostly skeletal limestone, cherty in lower part

Lithology: limestone; chert

Borden Group (Mississippian) at surface, covers 28 % of this area

Borden Group - Mostly siltstone; lenses of crinodial limestone in upper part. Much cherty and silty limestone and dolomite in northwest. NP, top of New Providence Shale

Lithology: siltstone; limestone; dolostone (dolomite); chert

Whitewater Formation (Ordovician) at surface, covers 3 % of this area

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

Lithology: limestone; shale; mudstone

Louisville Limestone through Brassfield Limestone (Silurian) at surface, covers 12 % of this area

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

Lithology: limestone