Greenbush Coal Member

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Lithostratigraphy: Kewanee Group >>Spoon Formation >>Greenbush Coal Member
Chronostratigraphy: Paleozoic Erathem >>Pennsylvanian Subsystem >>Desmoinesian 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 Greenbush Coal Member of the Spoon Formation (Wanless, 1931a, p. 191).

Derivation

Named for Greenbush Township, Warren County.

Other names

History/background

Type section

Type location

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

Type author(s)

Type status

Reference section

Reference location

Reference author(s)

Reference status

Stratigraphic relationships

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.

Lithology

Core(s)

Photograph(s)

Contacts

Well log characteristics

Fossils

Age and correlation

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

Environments of deposition

Economic importance

Remarks

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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