Named as a member of Pawhuska limestone; named for exposures near the house on the Plummer ranch, T26N, R9E, eastern part of the Osage Nation, Osage Co, OK on the Chautauqua platform. Also present on the Myers gas dome just southwest of T27N near Myers station on the Midland Valley Railway. No type locality designated. Consists of black flinty, angular limestone which is only locally fossiliferous; is separated into two benches by 6 to 8 ft of shale. Outcrop of upper bench is usually marked by long, square-edged blocks, only one edge of which is exposed. Lower bench is of much less value as a key bed. About 15 to 20 ft below the top of the Plummer is a very persistent sandstone bed about 2 ft thick. The Pawhuska limestone overlies Elgin sandstone. Plummer overlies and underlies unnamed parts of Pawhuska. Geologic maps. Columnar sections. Of Pennsylvanian age.

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