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


M. E. Hopkins and J. A. Simon

Name Origin

The Palzo Sandstone Member of the Spoon Formation (Cady, 1942, p. 9; Weller et al., 1942a, p. 10, footnote) is named for Palzo, Williamson County.

Type Section

The type locality consists of exposures near the village of Palzo (SE 16, 10S-4E) (Wanless, 1956, p. 10).


It is correlated with the Isabel Sandstone of western Illinois and the Sebree Sandstone Member of western Kentucky.

Extent and Thickness

The Palzo Sandstone is well developed throughout the state in both channel and nonchannel facies and is locally more than 50 feet thick.


It is similar in appearance to other sandstones in the Spoon Formation in southern Illinois.


CADY, G. H., 1942, Analysis of Illinois coals: U.S. Bureau of Mines and Technology Paper 641, p. 1-23.
WANLESS, H. R., 1956, Classification of the Pennsylvanian rocks of Illinois as of 1956: Illinois State Geological Survey Circular 217, 14 p.
WELLER, J. M., L. G. HENBEST, and C. O. DUNBAR, 1942a, Stratigraphy of the fusuline-bearing beds of Illinois: Illinois State Geological Survey Bulletin 67, p. 9-34.

ISGS Codes

Stratigraphic Code Geo Unit Designation