Spoon Formation (ILPAs;0)

State	Illinois
Name	Spoon Formation
Geologic age	Pennsylvanian
Original map label	3030
Comments	Sandstone, siltstone, clay, underclay, coal, limestone Based on the stratigraphic column on the 1967 paper map, the Spoon Formation appears to consist of about 50% shale, 10% limestone, 20% sandstone, 10% coal, 5% underclay and <5% black shale. This formation includes the DeKoven and Davis Coal members and the Curlew and Leville Limestone members.
Primary rock type	shale
Secondary rock type	sandstone
Other rock types	clay or mud; limestone; coal; black shale
Lithologic constituents	Major Sedimentary > Clastic > Mudstone > ShaleSpoon Formation - Based on the stratigraphic column on the 1967 paper map, the Spoon Formation appears to consist of about 50% shale, 10% limestone, 20% sandstone, 10% coal, 5% underclay and <5% black shale. This formation includes the DeKoven and Davis Coal members and the Curlew and Leville Limestone members. Minor Sedimentary > Carbonate > LimestoneSpoon Formation - Based on the stratigraphic column on the 1967 paper map, the Spoon Formation appears to consist of about 50% shale, 10% limestone, 20% sandstone, 10% coal, 5% underclay and <5% black shale. This formation includes the DeKoven and Davis Coal members and the Curlew and Leville Limestone members. Sedimentary > Clastic > SandstoneBased on the stratigraphic column on the 1967 paper map, the Spoon Formation appears to consist of about 50% shale, 10% limestone, 20% sandstone, 10% coal, 5% underclay and <5% black shale. This formation includes the DeKoven and Davis Coal members and the Curlew and Leville Limestone members. Incidental Sedimentary > Clastic > Mudstone > Shale > Black-shaleSpoon Formation - Based on the stratigraphic column on the 1967 paper map, the Spoon Formation appears to consist of about 50% shale, 10% limestone, 20% sandstone, 10% coal, 5% underclay and <5% black shale. This formation includes the DeKoven and Davis Coal members and the Curlew and Leville Limestone members. Sedimentary > CoalSpoon Formation - Based on the stratigraphic column on the 1967 paper map, the Spoon Formation appears to consist of about 50% shale, 10% limestone, 20% sandstone, 10% coal, 5% underclay and <5% black shale. This formation includes the DeKoven and Davis Coal members and the Curlew and Leville Limestone members. Sedimentary > Clastic > Mudstone > ClaystoneSpoon Formation - Based on the stratigraphic column on the 1967 paper map, the Spoon Formation appears to consist of about 50% shale, 10% limestone, 20% sandstone, 10% coal, 5% underclay and <5% black shale. This formation includes the DeKoven and Davis Coal members and the Curlew and Leville Limestone members.
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 - Douglas - Ford - Fulton - Gallatin - Greene - Grundy - Hancock - Hardin - Henderson - Henry - Iroquois - Jackson - Jersey - Johnson - Kankakee - Kendall - Knox - La Salle - Livingston - Logan - McDonough - McLean - Macoupin - Madison - Mason - Mercer - Monroe - Morgan - Peoria - Perry - Piatt - Pike - Pope - Randolph - Rock Island - Saint Clair - Saline - Schuyler - Scott - Tazewell - Vermilion - Warren - Will - Williamson