Geologic units in Fulton county, Indiana

Wabash Formation (Silurian) at surface, covers 66 % of this area: Wabash Formation - Limestone, dolomite, and argillaceous dolomite
Lithology: limestone; dolostone (dolomite)
Antrim Shale (Devonian) at surface, covers 4 % of this area: Antrim Shale - Black shale; gray shale and limestone in lower part
Lithology: black shale; shale; limestone
Muscatatuck Group (Devonian) at surface, covers 30 % of this area: Muscatatuck Group - Limestone and dolomite
Lithology: limestone; dolostone (dolomite)