Named as a member (1 of 6 named members) of Savanna sandstone. Savanna is 1 of 5 formation names applied to rocks formerly assigned to Winslow formation. [Preferred usage for Winslow as a result of this study not clearly stated.] Named for exposure along Sam Creek in sec 15, T14N, R18E, Muskogee Co, OK on the Chautauqua platform. No type locality designated. Area of this report is in Muskogee Co. In a composite section of the Savanna sandstone in the northern part of Muskogee Co, Sam Creek shown as consisting of (ascending): gray limestone with layers of gray shale, 3 ft 8 inches thick; alternation of gray limestone and gray, fossiliferous shale, the former essentially a reef composed of CAMPOPHYLLUM TORQUIUM, 11 inches thick; gray, fossiliferous shale, 3 1/2 ft thick; gray limestone which weathers brown and contains so many MARGINIFERA MURICATA that it is almost coquina, 6 inches thick. Separated from underlying Spaniard limestone member of Savanna by 40 ft of unnamed shale. Separated from overlying Spiro sandstone member (new) of Savanna by 3 ft of unnamed buff shale. Both unnamed shales are part of the Savanna. Columnar section. Stratigraphic chart. Geologic map. Of Early Pennsylvanian age.

Source: GNU records (USGS DDS-6; Denver GNULEX).