|Geologic age||Pennsylvanian (Bashkirian)|
Sedimentary > Clastic > Sandstone (Bed)Sandstone can be conglomeratic.
Sedimentary > Clastic > Mudstone > Shale (Bed, Carbonaceous)Shale can be silty and carbonaceous.
Sedimentary > Coal (Bed)
Sedimentary > Carbonate > Limestone (Bed)
|Comments||Thickness from stratigraphic columns: Caseyville Fm (0-500’) in southern Illinois (south of 40 degrees north latitude); Caseyville (0-90’) in northern Illinois (north of 40 degrees north latitude). The Caseyville Formation represents the lower part of the Racoon Creek Group. In southern Illinois, the Caseyville Formation includes, from oldest to youngest, the Wayside Sandstone, Battery Rock Sandstone, "Biehl, Buchanan, Jordan, Pottsville, Ridgley", Pounds Sandstone members (and also some unnamed coal beds). [Oil well drillers' terms shown in quotation marks.]|
|Stratigraphic units||Wayside Sandstone, Battery Rock Sandstone, "Biehl, Buchanan, Jordan, Pottsville, Ridgley", Pounds Sandstone|
Kolata, D.R., comp., 2005, Bedrock Geology of Illinois: Champaign, Ill., Illinois State Geological Survey, Illinois Map Series 14, scale 1:500,000.
|Counties||Gallatin - Hardin - Jackson - Johnson - Mercer - Pope - Randolph - Rock Island - Saline - Union - Williamson|