Assumption Coal Member of Tradewater Formation of Raccoon Creek Group (IL-local)
Middle Pennsylvanian (Desmoinesian)
Type locality: mine in NE/4 NW/4 sec. 2, T. 12 N., R. 1 E., Assumption quadrangle, Christian Co., southwestern IL (Kosanke and others, 1960; coal named by Cady, 1935, Illinois Geol. Survey Bull. 62).
Illinois basin
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