Historical:Jamestown Coal Member

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Handbook of Illinois Stratigraphy
Series Bulletin 95
Author H. B. Willman, Elwood Atherton, T. C. Buschbach, Charles Collinson, John C. Frye, M. E. Hopkins, Jerry A. Lineback, Jack A. Simon
Date 1975
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Lithostratigraphy: Kewanee Group >>Carbondale Formation >>Jamestown Coal Member
Chronostratigraphy: Paleozoic Erathem >>Pennsylvanian Subsystem >>Desmoinesian Series
Allostratigraphy: Absaroka Sequence


M. E. Hopkins and J. A. Simon

Name Origin

The Jamestown Coal Member of the Carbondale Formation (Bell et al., 1931, p. 3) is a widespread but thin coal in southern Illinois named for Jamestown, Perry County.

Type Section

Jamestown is near the type locality (NW NE 34, 5S-4W) (Wanless, 1939, p. 17, 19, 88; 1956, p. 10).


The Jamestown Coal is equivalent to the Hymera Coal Member (VI), which is an important commercial coal in Indiana, and to the No. 12 coal in western Kentucky.

Extent and Thickness

The coal is seldom more than a few inches thick in southern Illinois (fig. P-3B), but in southern Clark County and adjacent Crawford County in eastern Illinois it is reported in drill records to be as much as 6 feet thick.


BELL, A. H., C. G. BALL, and L. C. MCCABE, 1931, Geology of the Pinckneyville and Jamestown areas, Perry County, Illinois: Illinois State Geological Survey Illinois Petroleum 19, 22 p.
WANLESS, H. R., 1939, Pennsylvanian correlations in the Eastern Interior and Appalachian coal fields: Geological Society of America Special Paper 17, 130 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