Elevation: 9,570 feet
Type: Silver, Platinum
A 90 foot shaft was sunk in amphibolite and metagabbro emplaced in hornblendic and felsic gneiss. The rocks exposed in the shaft are cut by numerous small faults and veins of calcite and pegmatite. The faults commonly contain up to an inch of gouge, some of which is rich in sulphides, and may include thin calcite seams. Some of the gouge material collected in 1924 by Hess (1926, p. 133) assayed 0.03 oz. platinum, 0.05 oz. iridium, and less than 1 oz. silver per short ton, with a trace of gold. Dump samples assayed by the NRRI in 1961 contained only copper and iron.
Source: The Centennial Ridge Gold-Platinum District, Albany County, Wyoming, 1968. The Geological Survey of Wyoming.