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Geologic units in Henry county, Indiana

Louisville Limestone through Brassfield Limestone (Silurian) at surface, covers 36 % of this area

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

Pleasant Mills Formation (Silurian) at surface, covers 21 % of this area

Dolomite, limestone, and argillaceous dolomite

Whitewater Formation (Ordovician) at surface, covers 20 % of this area

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

Dillsboro Formation (Ordovician) at surface, covers 10 % of this area

Skeletal limestone and calcareous shale

Muscatatuck Group (Devonian) at surface, covers 5 % of this area

Limestone and dolomite

Wabash Formation (Silurian) at surface, covers 5 % of this area

Limestone, dolomite, and argillaceous dolomite

Ordovician rocks, undifferentiated (Silurian) at surface, covers 3 % of this area

Shale and limestone; upper part of Maquoketa Group in deep buried valleys; Maquoketa to upper part of Knox Supergroup in Kentland area