The Ste. Genevieve Formation and related strata in the Blue River Group comprise more than 75 meters of Middle Mississippian carbonate deposition across the Indiana portion of the Eastern Interior Basin in Valmeyeran seaways. Forty kilometres of subterranean caverns occur in this carbonate rock sequence in the Garrison Chapel karst area where blind valleys are a striking topographical feature. The bedrock floor of a karst valley is locally accordant with a continuous horizon of lithographic limestone named Indian Creek Beds and illustrated on five cavern stratigraphic reference profiles.
Conner, Garre A..
Stratigraphic sections in the Ste. Genevieve Formation (Middle Mississippian) exposed in Garrison Chapel karst area caverns - Western Monroe County, Indiana USA.
International Journal of Speleology,
Available at: http://scholarcommons.usf.edu/ijs/vol16/iss3/2