Cotter and Jefferson City Dolomites
St. Peter Sanstone and Everton Formation (Middle Ordovician)
Cason Shale and Fernvale Limestone (Upper Ordovician) and Kimmswick Limestone, Plattin Limestone, and Joachim Dolomite (Middle Ordovician)
Chattanooga Shale (Lower Mississippian and Upper Devonian), Clifty Limestone (Middle Devonian), and Penters Chert (Lower Devonian)
Gravel on isolated hills within 40 miles (64km) of the Mississippi Embayment. Many small deposits to the west not shown
Sand and clay
Fine crystalline, silty, cherty dolomite, and oolitic chert with local sandstone beds.