Historical:Burroughs Limestone Member

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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
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Lithostratigraphy: McLeansboro Group >>Modesto Formation >>Burroughs Limestone Member
Chronostratigraphy: Paleozoic Erathem >>Pennsylvanian Subsystem >>Missourian Series
Allostratigraphy: Absaroka Sequence


M. E. Hopkins and J. A. Simon

Name Origin

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) is named for Burroughs Branch, a tributary of Macoupin Creek, in Macoupin County.

Type Section

The type section consists of outcrops along the branch on the west side of Carlinville (NW SW 27, 10N-7W).

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.

Stratigraphic Position

Its position is 14-17 feet above the Carlinville Limestone and 18 feet or less below the Macoupin Limestone.


The Burroughs is a dark gray, sandy, clastic limestone.


It contains crinoid columnals and brachiopods.


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.

ISGS Codes

Stratigraphic Code Geo Unit Designation