Alluvium - clay, silt, sand, and gravel.
Sandstone, chert and interbedded dolomite
Coarse - crystalline cherty dolomite with a basal Gunter Sandstone Member.
Alluvial deposits on one or more terrace levels
Alluvial deposits of local streams or of overbank flow of major streams - In some areas includes deposits in abandoned meanders of major streams
Deposited mostly on terrace deposits of the second level. Younger than some terrace deposits, older than others
Eminence Dolomite - dolomite with some druse - coated chert. Potosi Dolomite - dolomite with abundance of druse - coated chert.