This district is in northeastern Nevada County in the vicinity of English Mountain and Bowman Lake. The area was first mined during the 1860s, followed by activity at the English Mountain gold and copper mines during the 1890s and early 1900s. There has been minor prospecting since.
The area is underlain by slate, schist, hornfels and granite, all of wbich are cut by diorite and quartz-diorite dikes. The ore deposits consist of iron-rich zones containing quartz, free gold, galena, pyrite, and chalcopyrite. Molybednite is abundant in places. The principal gold sources have been the English Mountain Gold and Yellow Metal mines.
Lindgren, Waldemar, 1900, Colfax folio: U. S. Geol. Survey Geol. Atlas of the U. S., folio 66, 11 pp.
MacBoyle, Errol, 1919, Nevada County, English Mountain and Yellow Metal mines: California Min. Bur. Rept. 16, pp. 164 and 258.