Conodonts described in this paper show that the West Franklin Limestone Member of the Shelburn Formation and equivalent units are mostly of Desmoinesian age but are in part Missourian (Pennsylvanian). The sedimentation, stratigraphy and conodont paleoecology of the one to three limestone benches and immediately associated rocks are described and show generally nearshore, sometimes harsh conditions, with shifting areas of deposition.
Brown, L. M., and Rexroad, C. B., 2009, Conodont paleontology of the West Franklin Limestone Member of the Shelburn Formation (Pennsylvanian) in the southeastern part of the Illinois Basin: Indiana Geological Survey Special Report, 34 p.,8 figs., 4 tables.
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