Geologic units in Jackson county, Indiana

Muscatatuck Group (Devonian) at surface, covers 1 % of this area: Muscatatuck Group - Limestone and dolomite
Lithology: limestone; dolostone (dolomite)
New Albany Shale (Devonian-Mississippian) at surface, covers 20 % of this area: New Albany Shale - Black and greenish-gray shale
Lithology: black shale; shale
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 76 % 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