|Name||Ullin and Salem Limestones|
|Geologic age||Mississippian (Visean)|
Sedimentary > Carbonate > Limestone (Bed, Reef)Limestone can be oolitic, bioclastic, or cherty, also may be limestone reef.
|Comments||Thickness from stratigraphic column for southern Illinois (south of 40 degrees north latitude), from oldest to youngest: Ullin Ls (0-800’), and Salem Ls (0-500’), both of which comprise part of the Mammoth Cave Group. The "Warsaw lime" occurs within the Ullin Ls. [Oil well drillers' terms shown in quotation marks.]|
|Stratigraphic units||Warsaw Lime|
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|