Galum Limestone Member

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Lithostratigraphy: Kewanee Group >>Carbondale Formation >>Galum Limestone 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


Original description

The Galum Limestone Member of the Carbondale Formation (Bell et al., 1931, p. 3).


Named for Galum Creek, Perry County.

Other names


Type section

Type location

The type section occurs along Galum Creek (near cen. N line 13, 6S-4W) (Wanless, 1956, p. 11).

Type author(s)

Type status

Reference section

Reference location

Reference author(s)

Reference status

Stratigraphic relationships

It is overlain by the underclay of the Danville (No. 7) Coal and underlain by a few feet of greenish gray shale that separates the Galum from the Bankston Fork Limestone.

Extent and thickness

It is recognized only in and near Perry County, and is seldom more than 3 feet thick.


It is generally an impure, argillaceous, nodular, nonfossiliferous limestone.




Well log characteristics


Age and correlation

Environments of deposition

Economic importance



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., 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