Ste. Genevieve and St. Louis Limestones, undivided; includes Salem Limestone west of Christian County
Rocks of Chesterian age, lower part
Rocks of Chesterian age, upper part
Alluvium; includes glacial deposits along the Ohio River and its tributaries west of Cannelton locks
Lamprophyre dikes and sills; in Caldwell, Crittenden, and Livingston Counties
Lower Pope Group (Aux Vases Sandstone through Glen Dean Limestone).
St. Louis Limestone.
Upper Pope Group (Tar Springs Sandstone through Kinkaid Limestone).
Ullin and Salem Limestones in southern Illinois.
Ste. Genevieve Limestone.