Historical:Bunje Limestone Member
Lithostratigraphy: McLeansboro Group >>Bond Formation >>Bunje Limestone Member
Chronostratigraphy: Paleozoic Erathem >>Pennsylvanian Subsystem >>Missourian Series
Allostratigraphy: Absaroka Sequence
Authors
M. E. Hopkins and J. A. Simon
Name Origin
The Bunje Limestone Member of the Bond Formation (Simon, in Kosanke et al., 1960, p. 39) is named for Bunje Station, Bond County.
Type Section
The type section is about 1 mile south of Bunje Station, along Dry Fork (SE SW 7, 6N-4W).
Extent and Thickness
The Bunje is known only in the type locality, where it is generally less than 2 feet thick.
Stratigraphic Position
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.
Fossils
It is very fossiliferous, having a fauna dominated by large pelecypods, and the upper few inches is characterized by cone-in-cone structure.
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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