Reference | {Deposit:: ESPENSHADE, G.H., 1954, GEOLOGY AND MINERAL DEPOSITS OF THE JAMES RIVER-ROANOKE RIVER MANGANESE DISTRICT VIRGINIA, U.S. GEOLOGICAL SURVEY BULL. 1008, 155P.}{Deposit:: ZEITNER, J.C., 1968, VIRGINIA, APPALACHIAN MINERAL AND GEM TRAILS, P.41-56} |