This composite section consists of a sequence of roadcuts on Missouri 8, between the town of Flat River and the bridge over Big River, St. Francois County, Missouri (Fig. 1). It comprises strata from upper Bonneterre Formation to basal Derby-Doerun Dolomite; the entire Davis Formation is represented. This exposure is within 3 mi (4.8 km) of the type section of the Davis Formation (SW¼Sec.7,T.36N.,R.5 E., to NE¼Sec.13,T.36N., R.4E.), where approximately 170 ft (52 m) of Davis strata have been described (Buckley, 1908)