Bunje Limestone Member
Lithostratigraphy: McLeansboro Group >>Bond Formation >>Bunje 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 Bunje Limestone Member of the Bond Formation (Simon, in Kosanke et al., 1960, p. 39).
Derivation
Named for Bunje Station, Bond County.
Other names
History/background
Type section
Type location
The type section is about 1 mile south of Bunje Station, along Dry Fork (SE SW 7, 6N-4W).
Type author(s)
Type status
Reference section
Reference location
Reference author(s)
Reference status
Stratigraphic relationships
It is underlain by an unnamed sandstone unit and is commonly about 40 feet above the Sorento Limestone. The Bunje is separated from the Flat Creek Coal above by a few feet of shale and underclay.
Extent and thickness
The Bunje is known only in the type locality, where it is generally less than 2 feet thick.
Lithology
Core(s)
Photograph(s)
Contacts
Well log characteristics
Fossils
It is very fossiliferous, having a fauna dominated by large pelecypods, and the upper few inches is characterized by cone-in-cone structure.
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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