Palzo Sandstone Member

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Lithostratigraphy: Kewanee Group >>Spoon Formation >>Palzo Sandstone 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 Palzo Sandstone Member of the Spoon Formation (Cady, 1942, p. 9; Weller et al., 1942a, p. 10, footnote).


Named for Palzo, Williamson County.

Other names


Type section

Type location

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

Type author(s)

Type status

Reference section

Reference location

Reference author(s)

Reference status

Stratigraphic relationships

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.




Well log characteristics


Age and correlation

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

Environments of deposition

Economic importance



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