Reference | {Deposit:: BUTTS, CHARLES, 1933, GEOLOGY MAP OF THE APPALACHIAN VALLEY OF VIRGINIA, VIRGINIA GEOLOGICAL SURVEY BULLETIN 14.}{Deposit:: COOPER, B.N., 1936, STRATIGRAPHY AND STRUCTURE OF THE MARION AREA, VIRGINIA, VIRGINIA GEOLOGICAL SURVEY BULLETIN 46-L}{Deposit:: EDMUNDSON, R.S., 1938, BARITE DEPOSITS OF VIRGINIA, VIRGINIA GEOLOGICAL SURVEY BULETIN 53}{Deposit:: FRENCH, B.E., 1967, THE GEOLOGY OF THE MARION DOME, V.P.I. MASTERS THESIS (UNPUBLISHED)} |