| Reference | {Deposit:: DIETRICH, R.V., 1970, MINERALS OF VIRGINIA: VIRGINIA POLYTECHNIC INSTITUTE RESEARCH DIVISION BULLETIN 47, WILLIAMS PRINTING CO., RICHMOND, VA., 325 P.}{Deposit:: MITCHELL, R.S., AND ZULKIEWICZ, R.J., 1970, VIRGINIA METAMICT MINERALS: PYROCHLORE-MICROLITE SERIES, SOUTHEASTERN GEOLOGY, VOL. 11, NO. 3, PP. 173-185.}{Deposit:: HEINRICH, E.W., 1962, RADIOACTIVE COLUMBITE, THE AMERICAN MINERALOGIST, VOL. 47, PP. 1363-1379.} |