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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.
Elwood Atherton, Charles Collinson, and Jerry A. Lineback
West Baden Group (Cumings, 1922, p. 514; Gray et al., 1960, p. 44).
Named for West Baden, Orange County, Indiana.
The West Baden Group consists of the Bethel, Ridenhower, and Cypress Formations.
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).
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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.<br>
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.<br>
SWANN, D. H., 1963, Classification of Genevievian and Chesterian (Late Mississippian) rocks of Illinois: Illinois State Geological Survey Report of Investigations 216, 91 p.
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