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|category7=Limestone |tree3=Shumway Limestone Member

...ndbook of Illinois Stratigraphy: Illinois State Geological Survey Bulletin 95, 261 p. ...ion a few feet below the coal that occurs just below the Shumway Limestone Member (Willman et al., 1967). It thus includes the upper half of the Mattoon Form

...ndbook of Illinois Stratigraphy: Illinois State Geological Survey Bulletin 95, 261 p. Named for the state of Missouri, where strata containing much limestone and a very little coal overlie the Desmoinesian rocks.