Named as uppermost member (of 7) of Boone Formation; named for its type locality on Spring River 6 mi east of Miami, Ottawa Co, OK. Area of this report is in Picher field, a mining districts which straddles the OK-KS State line just a few miles west of the MO State line on the Chautauqua platform and Cherokee basin. Consists of alternating chert and fine- to medium-grained brown limestone, cotton rock (or tripoli). Chert is conspicuously brown and blue in lower part, paler above. Comprises the lettered units from B to H beds (Fowler, 1942). Within the Wyandotte quad, is 0-140 ft thick; increases rather gradually in original stratigraphic thickness from eastern to western part in the mining field; 60 ft thick near Spring River, 140 ft thick southwest of Melrose, KS. Conformably overlies Baxter Springs Member (named) of Boone Formation; is overlain in at least a part of the mining field by the Quapaw Limestone (named) of Warsaw or Salem age. Contains fossils scattered at different levels. Isopach map; geologic map; cross section; stratigraphic table. Of Late Mississippian, Meramec age.

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