Historical:Greenbush 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 >>Spoon Formation >>Greenbush Coal Member
Chronostratigraphy: Paleozoic Erathem >>Pennsylvanian Subsystem >>Desmoinesian Series
Allostratigraphy: Absaroka Sequence

Authors

M. E. Hopkins and J. A. Simon

Name Origin

The Greenbush Coal Member of the Spoon Formation (Wanless, 1931a, p. 191) is named for Greenbush Township, Warren County.

Type Section

The type locality is in Greenbush Township (E 1/2 24, 8N-1W) (Wanless, 1956, p. 10; 1957, p. 81, 205).

Correlation

It is correlated with the De Koven Coal of southern Illinois and western Kentucky.

Extent and Thickness

The Greenbush Coal is seldom more than a few inches thick, and it grades into a thin carbonaceous shale in some localities.

References

WANLESS, H. R., 1931a, Pennsylvanian cycles in western Illinois: Illinois State Geological Survey Bulletin 60, p.
WANLESS, H. R., 1956, Classification of the Pennsylvanian rocks of Illinois as of 1956: Illinois State Geological Survey Circular 217, 14 p.
WANLESS, H. R., 1957, Geology and mineral resources of the Beardstown, Glasford, Havana, and Vermont Quadrangles: Illinois State Geological Survey Bulletin 82, 233 p.

ISGS Codes

Stratigraphic Code Geo Unit Designation
3200
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