Carbondale Formation (ILPAc;0)

State	Illinois
Name	Carbondale Formation
Geologic age	Pennsylvanian
Original map label	2480
Comments	Carbondale Formation - Based on the stratigraphic column on the 1967 paper map, the Carbondale Formation appears to consist of about 40% shale, 20 % limestone, 15% underclay, 10% sandstone, 10% coal and <5% black shale. This unit includes the Nos. 2, 5, 6, and 7 coal beds.
Primary rock type	shale
Secondary rock type	limestone
Other rock types	clay or mud; sandstone; coal; black shale
Lithologic constituents	Major Sedimentary > Clastic > Mudstone > ShaleCarbondale Formation - Based on the stratigraphic column on the 1967 paper map, the Carbondale Formation appears to consist of about 40% shale, 20 % limestone, 15% underclay, 10% sandstone, 10% coal and <5% black shale. This unit includes the Nos. 2, 5, 6, and 7 coal beds. Minor Sedimentary > CoalCarbondale Formation - Based on the stratigraphic column on the 1967 paper map, the Carbondale Formation appears to consist of about 40% shale, 20 % limestone, 15% underclay, 10% sandstone, 10% coal and <5% black shale. This unit includes the Nos. 2, 5, 6, and 7 coal beds. Sedimentary > Clastic > Mudstone > ClaystoneCarbondale Formation - Based on the stratigraphic column on the 1967 paper map, the Carbondale Formation appears to consist of about 40% shale, 20 % limestone, 15% underclay, 10% sandstone, 10% coal and <5% black shale. This unit includes the Nos. 2, 5, 6, and 7 coal beds. Sedimentary > Carbonate > LimestoneCarbondale Formation - Based on the stratigraphic column on the 1967 paper map, the Carbondale Formation appears to consist of about 40% shale, 20 % limestone, 15% underclay, 10% sandstone, 10% coal and <5% black shale. This unit includes the Nos. 2, 5, 6, and 7 coal beds. Sedimentary > Clastic > SandstoneCarbondale Formation - Based on the stratigraphic column on the 1967 paper map, the Carbondale Formation appears to consist of about 40% shale, 20 % limestone, 15% underclay, 10% sandstone, 10% coal and <5% black shale. This unit includes the Nos. 2, 5, 6, and 7 coal beds. Incidental Sedimentary > Clastic > Mudstone > Shale > Black-shaleCarbondale Formation - Based on the stratigraphic column on the 1967 paper map, the Carbondale Formation appears to consist of about 40% shale, 20 % limestone, 15% underclay, 10% sandstone, 10% coal and <5% black shale. This unit includes the Nos. 2, 5, 6, and 7 coal beds.
Map references	Willman, H.B., and others, (compilers), 1967, Geologic Map of Illinois: Illinois State Geological Survey, scale= 1:500,000, paper.
Unit references	Willman, H.B., and others, (compilers), 1967, Geologic Map of Illinois: Illinois State Geological Survey, scale= 1:500,000, paper.
Geographic coverage	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 - Monroe - Morgan - Peoria - Perry - Piatt - Pike - Putnam - Randolph - Saint Clair - Saline - Sangamon - Schuyler - Scott - Stark - Tazewell - Vermilion - Warren - Will - Williamson - Woodford