Reynoldsburg Coal Member
Lithostratigraphy: McCormick Group >>Abbott Formation >>Reynoldsburg Coal Member
Chronostratigraphy: Paleozoic Erathem >>Pennsylvanian Subsystem >>Atokan 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 Reynoldsburg Coal Member of the Abbott Formation (Weller, 1940, p. 39).
Derivation
Named for Reynoldsburg, Johnson County.
Other names
History/background
Type section
Type location
The type locality is north of Cedar Creek, Johnson County, Illinois (W 1/2 32, 11S-4E).
Type author(s)
Type status
Reference section
Reference location
Reference author(s)
Reference status
Stratigraphic relationships
The Reynoldsburg Coal Member is the lowermost named member in southern Illinois.
Extent and thickness
The Reynoldsburg is well known only in a relatively small area in the central part of the southern Illinois outcrop belt, where the thickness of the coal is very irregular but is as much as 3 feet.
Lithology
The Reynoldsburg varies in character, apparently grading to a canneloid black shale near the type locality. The Reynoldsburg Coal has been mined locally in the type area. It is well exposed along Interstate 24 in the northernmost of a series of large highway cuts, which exposes all the Caseyville Formation and the lowermost part of the Abbott Formation.
Core(s)
Photograph(s)
Contacts
Well log characteristics
Fossils
Age and correlation
No coal at this position has been identified in western Illinois, but the No. 2 coal in western Kentucky is thought to be equivalent to the Reynoldsburg.
Environments of deposition
Economic importance
Remarks
References
WELLER, J. M., 1940, Geology and oil possibilities of extreme southern Illinois: Illinois State Geological Survey Report of Investigations 71, 71 p.
ISGS Codes
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