Shoal Creek Limestone Member
Lithostratigraphy: McLeansboro Group >>Bond Formation >>Shoal Creek Limestone Member
Chronostratigraphy: Paleozoic Erathem >>Pennsylvanian Subsystem >>Missourian 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 Shoal Creek Limestone Member of the Bond Formation (Engelmann, 1868, p. 175, 177-183).
Derivation
Named for Shoal Creek in Clinton County.
Other names
History/background
Type section
Type location
The type locality consists of exposures along Shoal Creek (3N-4W).
Type author(s)
Type status
Reference section
Reference location
Reference author(s)
Reference status
Stratigraphic relationships
The base of the Shoal Creek Limestone Member is the base of the Bond Formation in all except northern Illinois.
Extent and thickness
The limestone is commonly 6-8 feet thick, locally as much as 20 feet. It persists throughout most of the Illinois Basin and is quarried in southwestern Illinois.
Lithology
It is generally light gray, thick bedded, and fine grained. The Shoal Creek is an easily recognized marker on geophysical logs in most of the deeper part of the Illinois Basin. It is locally cut out by the Mt. Carmel Sandstone or the McWain Sandstone.
Core(s)
Photograph(s)
Contacts
Well log characteristics
Fossils
It contains a diverse open-marine fauna.
Age and correlation
It is correlated with the La Salle Limestone of northern Illinois, the lower part of the Winterset Limestone Member of Missouri, and the Carthage Limestone Member of western Kentucky. The Shoal Creek Limestone Member is also recognized in Indiana.
Environments of deposition
Economic importance
Remarks
References
ENGELMANN, HENRY, 1868, Geology of Clinton and Washington Counties: Geological Survey of Illinois, v. 3, p. 145-191.
ISGS Codes
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