West Baden Group

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Lithostratigraphy: Pope Megagroup >>West Baden Group
Chronostratigraphy: Paleozoic Erathem >>Mississippian Subsystem >>Chesterian Series >>Gasperian Stage
Allostratigraphy: Kaskaskia 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)

Elwood Atherton, Charles Collinson, and Jerry A. Lineback


Original description

West Baden Group (Cumings, 1922, p. 514; Gray et al., 1960, p. 44).


Named for West Baden, Orange County, Indiana.

Other names


Type section

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Reference section

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Stratigraphic relationships

The West Baden Group consists of the Bethel, Ridenhower, and Cypress Formations.

Extent and thickness

The West Baden Group occurs in southeastern Illinois and is most useful in an area where the Ridenhower is dominantly sandstone and separation of the formations is difficult-- in places impractical (Swann, 1963).





Well log characteristics


Age and correlation

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Economic importance



CUMINGS, E. R., 1922, Nomenclature and description of the geological formations of Indiana, in Handbook of Indiana geology: Indiana Department of Conservation Publication 21, p. 403-570.
GRAY, H. H., R. D. JENKINS, and R. M. WEIDMAN, 1960, Geology of the Huron area, south-central Indiana: Indiana Geological Survey Bulletin 20, 78 p.
SWANN, D. H., 1963, Classification of Genevievian and Chesterian (Late Mississippian) rocks of Illinois: Illinois State Geological Survey Report of Investigations 216, 91 p.

ISGS Codes

Stratigraphic Code Geo Unit Designation