The Bendigo or Riverside Mountain district is in the northeast corner of Riverside County. Gold was discovered here at the Mountaineer mine in 1898, and mining continued until around 1920. Some work was done in the district again in the 1930s. This region is underlain by limestone and schist, which in places are cut by diorite dikes. The ore bodies, replacement deposits that occur along limestone-schist contacts, contain gold, copper, silver, and manganese. Some of the ore deposits are as much as 15 feet thick, and extend to depths of 200 feet.
Alice, Gold Dollar, Jacknife, Mountaineer (Calzona), Morning Star, Steece.
Merrill, F. J. H., 1919, Riverside County, Bendigo district: California Min. Bur. Rept. 15, pp. 542-544.
Tucker, W. B., and Sampson, R. J., 1945, Riverside County, Mountaineer mine: California Div. Mines Rept. 41, p. 140.