Wayside Member: Difference between revisions

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Revision as of 20:09, 23 July 2018

Lithostratigraphy: McCormick Group >>Caseyville Formation >>Wayside Sandstone Member
Chronostratigraphy: Paleozoic Erathem >>Pennsylvanian Subsystem >>Morrowan 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 Wayside Sandstone Member of the Caseyville Formation (Lamar, 1925, p. 84-85).


Named for Wayside, Johnson County.

Other names


Type section

Type location

The type section consists of outcrops near the village (N1/2 30, 11S-2E) (Wanless, 1956, p. 9).

Type author(s)

Type status

Reference section

Reference location

Reference author(s)

Reference status

Stratigraphic relationships

The Wayside is the lowermost unit of the Pennsylvanian System on the western side of the southern Illinois outcrop belt.

Extent and thickness


Like the Lusk, the Wayside is a complex unit of interbedded lenticular sandstones as much as 50 feet thick that are separated by silty or sandy shales and siltstones, all part of a fluvial-deltaic complex. In the area south of Carbondale the thickness of the Wayside varies but averages about 70 feet.




Well log characteristics


Age and correlation

The Wayside is equivalent, at least in part, to the Lusk Shale to the east.

Environments of deposition

Economic importance



LAMAR, J. E., 1925, Geology and mineral resources of the Carbondale Quadrangle: Illinois State Geological Survey Bulletin 48, 172 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
Penn symbol.pngcv-w