Historical:Carlinville Limestone Member
M. E. Hopkins and J. A. Simon
The Carlinville Limestone Member of the Modesto Formation (Worthen, 1873, p. 290-301) is named for Carlinville, Macoupin County.
The type section consists of outcrops along Macoupin Creek (SW SW 35, 10N-7W) (Wanless, 1956, p. 11).
Extent and Thickness
The limestone is recognized only in part of southwestern Illinois, where it is thick-bedded, up to 5 feet thick.
The Carlinville contains an open-marine fauna.
WANLESS, H. R., 1956, Classification of the Pennsylvanian rocks of Illinois as of 1956: Illinois State Geological Survey Circular 217, 14 p.
WORTHEN, A. H., 1873, Geology and paleontology: Geological Survey of Illinois, v. 5, 619 p.
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