| State | Illinois |
|---|---|
| Name | Carbondale Formation |
| Geologic age | Pennsylvanian (Moscovian to Kasimovian) |
| Lithologic constituents |
Major
Sedimentary > Coal (Bed)Coal beds are portrayed with underclays.
Sedimentary > Clastic > Sandstone (Bed)
Sedimentary > Clastic > Mudstone > Shale (Bed)Shale can be silty.
Minor
Sedimentary > Carbonate > Limestone (Bed)
|
| Comments | Thickness from stratigraphic columns: Carbondale Fm (0-350’) in southern Illinois (south of 40 degrees north latitude); Carbondale Fm (0-230’) in northern Illinois (north of 40 degrees north latitude). In southern Illinois, the unit includes, from oldest to youngest, the Davis Coal and Dekoven Coal which are laterally equivalent to the Seelyville Coal, Colchester Coal, Mecca Quarry Shale, Survant Coal, Houchin Creek Coal, Excello Shale, Springfield Coal, Turner Mine Shale, St. David Limestone, Herrin Coal, Anna Shale, and Energy Shale. In northern Illinois, the unit includes, from oldest to youngest, the Colchester Coal, Francis Creek Shale, Mecca Quarry Shale, Oak Grove Limestone, Survant Coal, Houchin Creek Coal, Excello Shale, Hanover Limestone, Springfield Coal, Canton Shale, Vermilionville Sandstone, and Herrin Coal. |
| Stratigraphic units | Davis Coal, Dekoven Coal, Seelyville Coal, Turner Mine Shale, St. David Limestone, Anna Shale, and Energy Shale, Colchester Coal, Francis Creek Shale, Mecca Quarry Shale, Oak Grove Limestone, Survant Coal, Houchin Creek Coal, Excello Shale, Hanover Limestone, Springfield Coal, Canton Shale, Vermilionville Sandstone, Herrin Coal |
| References | Kolata, D.R., comp., 2005, Bedrock Geology of Illinois: Champaign, Ill., Illinois State Geological Survey, Illinois Map Series 14, scale 1:500,000. |
| NGMDB product | |
| Counties | Adams - Brown - Bureau - Calhoun - Cass - Champaign - Clark - Coles - Douglas - Edgar - Ford - Fulton - Gallatin - Greene - Grundy - Hancock - Hardin - Henderson - Henry - Iroquois - Jackson - Jersey - Kankakee - Knox - La Salle - Livingston - Logan - McDonough - McLean - Macoupin - Madison - Marshall - Mason - Menard - Mercer - Morgan - Peoria - Perry - Piatt - Pike - Putnam - Randolph - Saint Clair - Saline - Sangamon - Schuyler - Scott - Stark - Tazewell - Vermilion - Warren - Will - Williamson - Woodford |