Summum Coal Member
Lithostratigraphy: Kewanee Group >>Carbondale Formation >>Summum Coal Member
Chronostratigraphy: Paleozoic Erathem >>Pennsylvanian Subsystem >>Desmoinesian Series
Allostratigraphy: Absaroka Sequence
Primary source
Willman, H. B., Elwood Atherton, T. C. Buschbach, Charles Collinson, John C. Frye, M. E. Hopkins, Jerry A. Lineback, and Jack A. Simon, 1975, Handbook of Illinois Stratigraphy: Illinois State Geological Survey Bulletin 95, 261 p.
Contributing author(s)
M. E. Hopkins and J. A. Simon
Name
Original description
The Summum (No. 4) Coal Member of the Carbondale Formation (Wanless, 1931a, p. 182, 192).
Derivation
Named for Summum, Fulton County.
Other names
History/background
The term "No. 4" was first used by Lesquereux (1866, p. 213) for this coal near Shawneetown, Gallatin County. It was also applied incorrectly by Worthen (1870) to the Springfield (No. 5) Coal in parts of Fulton County.
Type section
Type location
Summum is near the type locality (NE 3, 3N-2E) (Wanless, 1956, p. 10; 1957, p. 204).
Type author(s)
Type status
Reference section
Reference location
Reference author(s)
Reference status
Stratigraphic relationships
It normally is overlain by the black Excello Shale and overlies an underclay.
Extent and thickness
The coal, or the recognized position of the coal, is one of the most widespread stratigraphic markers in the state, but it is generally thin.
Lithology
Core(s)
Photograph(s)
Contacts
Well log characteristics
Fossils
Age and correlation
It is correlated with the Mulky coal of Missouri and Kansas, the Houchin Creek Coal Member (IVa) in Indiana, and the No. 8b coal in western Kentucky.
Environments of deposition
Economic importance
The Summum Coal Member has been mined only locally in Grundy, Kankakee, Fulton, and Saline Counties.
Remarks
References
LESQUEREUX, LEO, 1866, Report on the coal fields of Illinois: Geological Survey of Illinois, v. 1, p. 208-237.
WANLESS, H. R., 1931a, Pennsylvanian cycles in western Illinois: Illinois State Geological Survey Bulletin 60, p.
WANLESS, H. R., 1956, Classification of the Pennsylvanian rocks of Illinois as of 1956: Illinois State Geological Survey Circular 217, 14 p.
WANLESS, H. R., 1957, Geology and mineral resources of the Beardstown, Glasford, Havana, and Vermont Quadrangles: Illinois State Geological Survey Bulletin 82, 233 p.
WORTHEN, A. H., 1870, Geology and paleontology: Geological Survey of Illinois, v. 4, 508 p.
ISGS Codes
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