|Name||Ft. Payne Formation|
|Geologic age||Mississippian (Tourniaisian to Visean)|
Sedimentary > Carbonate > Limestone (Bed)Limestone can be cherty or dolomitic.
Sedimentary > Clastic > Mudstone > Shale (Bed)
|Comments||Thickness from stratigraphic column for southern Illinois (south of 40 degrees north latitude): Chouteau Ls (0-80’), Springville Sh (0-100’), Ft. Payne Fm (0-685’). The stratigraphic column for southern Illinois portrays the units, from oldest to youngest, as Chouteau Ls, Springville Sh, and Ft. Payne Fm (it also includes the Meppen Ls between the Chouteau Ls and Springville Sh, but the Meppen is NOT included in the unit description for Mfp).|
Kolata, D.R., comp., 2005, Bedrock Geology of Illinois: Champaign, Ill., Illinois State Geological Survey, Illinois Map Series 14, scale 1:500,000.
|Counties||Alexander - Hardin - Pulaski - Union|