Wayside Sandstone Member
Lithostratigraphy: McCormick Group >>Caseyville Formation >>Wayside Member
Chronostratigraphy: Paleozoic Erathem >>Pennsylvanian Subsystem >>Morrowan Series
Allostratigraphy: Absaroka Sequence
Authors
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).
Correlation
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.
Description
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.
References
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
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