Historical:Shawneetown Coal Member
Lithostratigraphy: Kewanee Group >>Carbondale Formation >>Shawneetown Coal Member
Chronostratigraphy: Paleozoic Erathem >>Pennsylvanian Subsystem >>Desmoinesian Series
Allostratigraphy: Absaroka Sequence
M. E. Hopkins and J. A. Simon
The Shawneetown Coal Member of the Carbondale Formation (Kosanke et al., 1960, p. 34-35) is named for Shawneetown, Gallatin County.
In Shawneetown, the type section is at a depth of 482.6 feet (erroneously given originally as 543.8 feet) in Union Colliery Company drill hole 28 (NW SW NW 23, 9S-9E) (Peppers, 1970, p. 43).
It is correlated with the Lowell Coal of northern and western Illinois and with the Survant Coal Member (IV) in eastern Indiana.
Extent and Thickness
The Shawneetown Coal is persistent in southern and eastern Illinois, but is known to crop out only in a strip mine near Mitchellsville, Saline County. It normally is thin, but in a few scattered drill holes it has been reported to be as much as 8 feet thick.
It is the upper of two coals in southeastern Illinois lying between the Colchester (No. 2) and Summum (No. 4) Coals that had previously been called Coal 2A.
It is overlain by dark shale and underlain by underclay.
KOSANKE, R. M., J. A. SIMON, H. R. WANLESS, and H. B. WILLMAN, 1960, Classification of the Pennsylvanian strata of Illinois: Illinois State Geological Survey Report of Investigations 214, 84 p.
PEPPERS, R. A., 1970, Correlation and palynology of coals in the Carbondale and Spoon Formations (Pennsylvanian) of the northeastern part of the Illinois Basin: Illinois State Geological Survey Bulletin 93, 173 p.
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