Geologic units in Huntington county, Indiana

Wabash Formation (Silurian) at surface, covers 87 % of this area

Limestone, dolomite, and argillaceous dolomite

Pleasant Mills Formation (Silurian) at surface, covers 8 % of this area

Dolomite, limestone, and argillaceous dolomite

Muscatatuck Group (Devonian) at surface, covers 4 % of this area

Limestone and dolomite

Louisville Limestone through Brassfield Limestone (Silurian) at surface, covers 0.3 % of this area

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