Bidwell Coal Member
Lithostratigraphy: Kewanee Group >>Spoon Formation >>Bidwell 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 Bidwell Coal Member of the Spoon Formation (Kosanke et al., 1960, p. 32, 65).
Derivation
Named for Bidwell School in Johnson County.
Other names
History/background
Type section
Type location
The type locality is near Bidwell School (NE SE SW 5, 11S-4E).
Type author(s)
Type status
Reference section
Reference location
Reference author(s)
Reference status
Stratigraphic relationships
Extent and thickness
The Bidwell Coal, although discontinuous, is more widespread than most of the coals in the lower part of the Spoon Formation in southern Illinois and is 4 feet thick in places, although generally thinner. It has been identified in only a few drill holes north of the outcrop belt. The Bidwell has not been recognized in western Illinois.
Lithology
Core(s)
Photograph(s)
Contacts
Well log characteristics
Fossils
Age and correlation
Environments of deposition
Economic importance
Remarks
References
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.
ISGS Codes
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