Salton Sea, Imperial County, California: California Pumice Mine
This pumice deposit is in the NE1/4 Sec. 32, T11S, R13E, SBM, Obsidian Butte quadrangle ( minutes), at Obsidian Butte, 8 miles N 65 degrees W of ... Salton Sea, Imperial County, California: California Pumice Mine. Gregg Wilkerson. Download Download PDF. Full PDF Package Download Full PDF Package. This Paper. A short summary of this paper. 37 ...