Historical:Copperas Creek Sandstone 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 >>Copperas Creek Sandstone Member
Chronostratigraphy: Paleozoic Erathem >>Pennsylvanian Subsystem >>Desmoinesian Series
Allostratigraphy: Absaroka Sequence


M. E. Hopkins and J. A. Simon

Name Origin

The Copperas Creek Sandstone Member of the Carbondale Formation (Savage, 1927, p. 309) is named for Copperas Creek in Fulton County, along which the sandstone is well exposed (Wanless, 1957, p. 114), but no type section was designated.


It is correlated with the Anvil Rock Sandstone of southern Illinois.

Extent and Thickness

The Copperas Creek occurs in western Illinois as a widespread, thin-bedded sheet sandstone and as a channel sandstone.


The Copperas Creek channels appear to be part of a south-to-southeast drainage system that connects with the Anvil Rock Sandstone channels of the deeper part of the Illinois Basin.


SAVAGE, T. E., 1927, Significant breaks and overlaps in the Pennsylvanian rocks of Illinois: American Journal of Science, v. 14, p. 307-316.
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