Breezy Hill Limestone Member

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Lithostratigraphy: Kewanee Group >>Carbondale Formation >>Breezy Hill Limestone Member
Chronostratigraphy: Paleozoic Erathem >>Pennsylvanian Subsystem >>Desmoinesian 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 Breezy Hill Limestone Member of the Carbondale Formation (Pierce and Courtier, 1937, p. 17).


Named for Breezy Hill, Crawford County, Kansas.

Other names


Type section

Type location

The type section is exposed at Breezy Hill.

Type author(s)

Type status

Reference section

Reference location

Reference author(s)

Reference status

Stratigraphic relationships

The Breezy Hill Limestone occurs in the lower part of the underclay of the Summum (No. 4) Coal in western and northern Illinois (Inden, 1968; Nance, 1970). In Missouri it occurs at the base of the underclay of the Mulky coal (Inden, 1968; Nance, 1970).

Extent and thickness

The member is widespread, though sporadic. It occurs either as an irregular, silty limestone, rarely over 1 foot thick, or as nodular masses in claystone.





Well log characteristics


The only fossils found in it in western Illinois are micritic patches and filaments, probably algal.

Age and correlation

Environments of deposition

This limestone is interpreted as fresh-water in Illinois and open-marine to the west in Kansas and Oklahoma, where it is several feet thick and contains a varied marine fauna.

Economic importance



INDEN, RICHARD, 1968, Petrographic analysis and environmental interpretation of the Breezy Hill Limestone in Illinois, Missouri, Kansas, and Oklahoma: University of Illinois thesis.
NANCE, R. B., 1970, Limestones and phosphatic rocks from the Summum and Liverpool cyclothems in western Illinois: Illinois State Geological Survey Guidebook Series 8, p. 75-83.
PIERCE, W. G., and W. H. COURTIER, 1937, Geology and coal resources of the southeastern Kansas coal field: Kansas Geological Survey Bulletin 24, 122 p.

ISGS Codes

Stratigraphic Code Geo Unit Designation