| Reference | {Deposit:: HEYL, A.V., AND PEARRE, N.C., 1965, MARYLAND GEOLOGICAL SURVEY BULL. 28, 71P.}{Deposit:: PEARRE, N., 1961, USGS MINERAL INV. RESOURCES MAP MR-12.}{Deposit:: OVERBECK, R.M., 1916, ECON. GEOL. VOL. 11, NO. 2, P. 159-163.}{Deposit:: SINGEWALD, J.T., JR., 1946, MARYLAND DEPT. GEOL. MINES AND WATER RES., CARROLL AND FREDERICK CO. REPT.P.159.}{Production:: UNPUBLISHED COBALT REPORT} |