Acton (west of), Los Angeles County, California – Acton Rock Co. (Dioritic Rock/Crushed Rock) (Excerpt from "Mines and Mineral Deposits of Los Angeles County," by Thomas E. Gay, Jr., Assistant Mining Geologist, California State Division of Mines, California Journal of Mines and Geology, Vol. 50, Nos. 3 and 4, July – October 1954, pp. 467-709.Web