This district is in the northwest corner of Mariposa County and the southwest corner of Tuolumne County in the vicinity of Lake McClure and Don Pedro Reservoir. The mines apparently were last worked in the 1930's. The region is underlain chiefly by greenstone with some interbeds of graphitic slate. There are a considerable number of northwest-striking gold-quartz veins often associated with diorite dikes. Most of the deposits are relatively shallow.
Mariposa County: Anita, Burr $350,000, Florinita, Jackson, White Rock. Tuolumne County: Buzzard Roost, Diamond, Hedley, Oak Mesa, Solambo.
Bowen, O. E., Jr., 1957, Mariposa County, Burr mine: California Jour. Mines and Geology, vol. 53, p. 247.