Ullin and Salem Limestones

Ullin and Salem Limestones in southern Illinois.
State Illinois
Name Ullin and Salem Limestones
Geologic age Mississippian (Visean)
Lithologic constituents
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.

NGMDB product
Counties Alexander - Hardin - Pulaski - Union