Burroughs Limestone Member

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

Primary source

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.

Contributing author(s)

M. E. Hopkins and J. A. Simon


Original description

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.

Other names


Type section

Type location

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

Type author(s)

Type status

Reference section

Reference location

Reference author(s)

Reference status

Stratigraphic relationships

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

Economic importance



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