Stonefort Limestone Member
Lithostratigraphy: Kewanee Group >>Spoon Formation >>Stonefort Limestone 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 Stonefort Limestone Member of the Spoon Formation (Henbest, 1928, p. 70-71).
Derivation
Named for Stonefort, Williamson County.
Other names
History/background
Type section
Type location
The type locality consists of a roadcut and near-by ravines (NE SE 25, 10S- 4E), a correction of the location given by Wanless (1956, p. 9) (Kosanke et al., 1960, p. 33).
Type author(s)
Type status
Reference section
Reference location
Reference author(s)
Reference status
Stratigraphic relationships
Extent and thickness
It is seldom over 3 feet thick, and extends throughout the greater part of southern Illinois. It has been identified on geophysical logs of oil tests in much of the southern part of the Illinois Basin.
Lithology
The Stonefort is a gray, fine-grained, marine limestone.
Core(s)
Photograph(s)
Contacts
Well log characteristics
Fossils
Age and correlation
Environments of deposition
Economic importance
Remarks
References
HENBEST, L. G., 1928, Fusulinellas from the Stonefort Limestone Member of the Tradewater Formation: Journal of Paleontology, v. 2, p. 70-85.
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
| Stratigraphic Code | Geo Unit Designation |
|---|---|
 tu-st |