Geologic units in Jasper county, Indiana

Muscatatuck Group (Devonian) at surface, covers 61 % of this area

Limestone and dolomite

Antrim Shale (Devonian) at surface, covers 20 % of this area

Black shale; gray shale and limestone in lower part

New Albany Shale (Devonian-Mississippian) at surface, covers 14 % of this area

Black and greenish-gray shale

Borden Group (Mississippian) at surface, covers 2 % of this area

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

Wabash Formation (Silurian) at surface, covers 2 % of this area

Limestone, dolomite, and argillaceous dolomite

Raccoon Creek Group (Pennsylvanian) at surface, covers 0.3 % of this area

Mostly shale and sandstone; also includes thin beds of limestone, clay, and coal. B, Buffaloville Coal Member; LB, Lower Block Coal Member

Ellsworth Shale (Devonian-Mississippian) at surface, covers 0.2 % of this area

Green shale; some black shale in lower part