Big Creek Shale Member
Lithostratigraphy: Kewanee Group >>Carbondale Formation >>Big Creek Shale 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 Big Creek Shale Member of the Carbondale Formation (Savage, 1927, p. 309, 313, 315).
Derivation
Named for Big Creek in Fulton County.
Other names
History/background
Type section
Type location
The type section occurs along Big Creek (7N-4E) (Wanless, 1957, p. 108).
Type author(s)
Type status
Reference section
Reference location
Reference author(s)
Reference status
Stratigraphic relationships
Extent and thickness
The Big Creek Shale Member is 10-30 feet thick. A shale is present at this position throughout much of the state, but the name has been used only in western Illinois.
Lithology
The shale is gray, soft, and sandy, and grades into the underlying Vermilionville Sandstone.
Core(s)
Photograph(s)
Contacts
Well log characteristics
Fossils
Age and correlation
Environments of deposition
Economic importance
Remarks
References
SAVAGE, T. E., 1927, Significant breaks and overlaps in the Pennsylvanian rocks of Illinois: American Journal of Science, v. 14, p. 307-316.
WANLESS, H. R., 1957, Geology and mineral resources of the Beardstown, Glasford, Havana, and Vermont Quadrangles: Illinois State Geological Survey Bulletin 82, 233 p.
ISGS Codes
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