Geologic units in Adams county, Indiana

Wabash Formation (Silurian) at surface, covers 48 % of this area

Limestone, dolomite, and argillaceous dolomite

Pleasant Mills Formation (Silurian) at surface, covers 35 % of this area

Dolomite, limestone, and argillaceous dolomite

Louisville Limestone through Brassfield Limestone (Silurian) at surface, covers 15 % of this area

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

Ordovician rocks, undifferentiated (Silurian) at surface, covers 2 % 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

Salina Group (Silurian) at surface, covers < 0.1 % of this area

Dolomite, gray, yellow-gray to olive-gray, laminated to thin bedded; occasional thin bed and laminae of dark gray shale and anhydrite and/or gypsum; brecciated zones in part.