Formally named as a member of Senora Formation of Cabaniss Group; named from the "Civil Township of Oowala." Previously observed, but not named, by Oakes, 1944; Tillman, 1952; and Gruman, 1954. Type section (Appendix 2, measured section 24) designated as approximately 0.75 mi north of the town of Sequoyah Siding, in the NW1/4 NW1/4 NW1/4 sec 13, T22N, R16E, Rogers Co, OK on the Chautauqua platform; thickness at type section is 21 ft. Observed in the highwalls of abandoned strip pits in northern and central Rogers Co. Consists of a light-brown to light-gray, very fine grained, micaceous, non-calcareous, thin-bedded, silty sandstone. This persistent sandstone is as thick as 20+ ft. Is 5-27 ft below the base of the Verdigris Limestone Member and 8-36 ft above the Croweburg coal, both of the Senora Formation of Cabaniss Group. Immediately overlain and underlain by unnamed silty gray shale of Senora. Basal contact is generally sharp; upper contact is gradational and difficult to define. Cross sections; measured section; columnar section. Of Middle Pennsylvanian, Desmoinesian age.

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