Wayside Sandstone Member

Jump to navigation Jump to search
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
Link Web page
PDF PDF file
Store ISGS Store

Lithostratigraphy: McCormick Group >>Caseyville Formation >>Wayside Member
Chronostratigraphy: Paleozoic Erathem >>Pennsylvanian Subsystem >>Morrowan Series
Allostratigraphy: Absaroka Sequence


M. E. Hopkins and J. A. Simon

Name Origin

The Wayside Sandstone Member of the Caseyville Formation is named for Wayside, Johnson County (Lamar, 1925, p. 84-85).

Type Section

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


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

Stratigraphic Position

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


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.


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