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- 18:15, 4 April 2016 Alan.Myers talk contribs uploaded File:Figure C-1B.jpg (Fig. C-1B -- Cambrian-Ordovician unconformity showing well bedded Oneota Dolomite overlying massive Potosi Dolomite in a quarry in Lee County, 6 miles south of Rochelle, Ogle County (Willman and Templeton, 1951, p. 113).)