Burroughs Limestone Member
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.
M. E. Hopkins and J. A. Simon
The Burroughs Limestone Member of the Modesto Formation (Ball, in Cooper, 1946, p. 12; 1952, p. 37, 38, 85; Kosanke et al., 1960, p. 38).
Named for Burroughs Branch, a tributary of Macoupin Creek, in Macoupin County.
The type section consists of outcrops along the branch on the west side of Carlinville (NW SW 27, 10N-7W).
Its position is 14-17 feet above the Carlinville Limestone and 18 feet or less below the Macoupin Limestone.
Extent and thickness
The Burroughs is recognized in only a small area in west-central Illinois, where it ranges from a fraction of an inch to more than 5 feet thick.
The Burroughs is a dark gray, sandy, clastic limestone.
Well log characteristics
It contains crinoid columnals and brachiopods.
Age and correlation
Environments of deposition
BALL, J. R., 1952, Geology and mineral resources of the Carlinville Quadrangle: Illinois State Geological Survey Bulletin 77, 110 p.
COOPER, C. L., 1946, Pennsylvanian ostracodes of Illinois: Illinois State Geological Survey Bulletin 70, 177 p.
KOSANKE, R. M., J. A. SIMON, H. R. WANLESS, and H. B. WILLMAN, 1960, Classification of the Pennsylvanian strata of Illinois: Illinois State Geological Survey Report of Investigations 214, 84 p.
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