Historical:Breezy Hill 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: Kewanee Group >>Carbondale Formation >>Breezy Hill Limestone Member
Chronostratigraphy: Paleozoic Erathem >>Pennsylvanian Subsystem >>Desmoinesian Series
Allostratigraphy: Absaroka Sequence

Authors

M. E. Hopkins and J. A. Simon

Name Origin

The Breezy Hill Limestone Member of the Carbondale Formation (Pierce and Courtier, 1937, p. 17) is named for Breezy Hill, Crawford County, Kansas.

Type Section

The type section is exposed at Breezy Hill.

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.

Stratigraphic Position

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).

Fossils

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

Depositional Environment

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.

References

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
2850
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