Old Salt Lake | Virtual Museum
Also see: "little black streaks on a sandy beach"
1927, California State Mining Bureau, Report XXIII of the State Mineralogist covering mining in California and the activities of the State Mining Bureau (1923), Tucker, W. B.. pp 299-300
1957, California Division of Mines and Geology, No. 176, Mineral commodities of California; geologic occurrence, economic development, and utilization of the state's mineral resources, page 647
1958, Mining Agents Annual Report, pages 486, 489, Cleveland-Cliffs Iron Company
1984, U.S. Bureau of Mines, Mineral Commodity Report - Titanium,- including Ilmenite, page 12