Shumway Limestone Member
Lithostratigraphy: McLeansboro Group >>Mattoon Formation >>Shumway Limestone Member
Chronostratigraphy: Paleozoic Erathem >>Pennsylvanian Subsystem >>Virgilian 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 Shumway Limestone Member of the Mattoon Formation (Weller, in Dunbar and Henbest, 1942, p. 28; Wanless, 1956, p. 12).
Derivation
Named for Shumway, Effingham County.
Other names
History/background
Type section
Type location
The type locality consists of exposures along Shoal Creek about 2 miles east of Shumway (SE SE SW 26, 9N-5E) (Kosanke et al., 1960, p. 81).
Type author(s)
Type status
Reference section
Reference location
Reference author(s)
Reference status
Stratigraphic relationships
Extent and thickness
At the type locality it is 2 feet thick.
Lithology
The Shumway is the upper, most persistent of two marine limestones. The Shumway and the thin coal a few feet under it are exposed in Effingham County. It is directly underlain by a black fissile shale and overlain by gray shale.
Core(s)
Photograph(s)
Contacts
Well log characteristics
Fossils
At the type locality it contains an abundant open-marine fauna dominated by brachiopods and containing a few solitary corals.
Age and correlation
Environments of deposition
Economic importance
Remarks
References
DUNBAR, C. O., and L. G. HENBEST, 1942, Pennsylvanian Fusulinidae of Illinois: Illinois State Geological Survey Bulletin 67, 218 p.
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.
WANLESS, H. R., 1956, Classification of the Pennsylvanian rocks of Illinois as of 1956: Illinois State Geological Survey Circular 217, 14 p.
ISGS Codes
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