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Manganese, iron, and barite deposits of the James River-Roanoke River district, Virginia
Gilbert H. Espenshade
1952, Miscellaneous Field Studies Map 5
During the period 1940-1942 the United States Geological Survey made a geologic study of the manganese deposits of the James River-Roanoke River district, in the general vicinity of Lynchburg, Va. (fig. 1), as part of its program of strategic minerals investigations.  This work was done by the writer and supervised...