Flat Creek Coal Member

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Lithostratigraphy: McLeansboro Group >>Bond Formation >>Flat Creek Coal 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


Original description

The Flat Creek Coal Member of the Bond Formation (Simon, in Wanless, 1955, p. 1764).


Named for Flat Creek in Bond County.

Other names


Type section

Type location

The type section is exposed along Flat Creek (NE SE 24, 6N-5W) (Kosanke et al., 1960, p. 39).

Type author(s)

Type status

Reference section

Reference location

Reference author(s)

Reference status

Stratigraphic relationships

The coal is widely overlain by a thin black shale and a marine limestone.

Extent and thickness

The Flat Creek is a thin, widespread coal readily recognized on geophysical logs in southwestern Illinois.





Well log characteristics


Age and correlation

It is correlated with the Flannigan Coal of southeastern and eastern Illinois and the Fairbanks Coal Member of Indiana.

Environments of deposition

Economic importance



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., 1955, Pennsylvanian rocks of Eastern Interior Basin: American Association of Petroleum Geologists Bulletin, v. 39, p. 1753-1820 (see 1962).

ISGS Codes

Stratigraphic Code Geo Unit Designation