Several mines and prospects lie west of Emerson Lake, which is in Southern San Bernardino County about 25 miles northwest of Twentynine Palms. The principal gold SOurces have been the Emerson and Los Padre mines. The deposits consist of parallel veins in gneiss and granitic rocks, and the ore occurs as small but rich pockets, Usually near the surface. Several high-grade pockets containing wire gold have been found here.
Tucker, W.B., and Sampson, R.J., 1940, San Bernardino County, Los Padre mine: California Div. Mines Rept. 36, p. 70.