Crystalline manganite and pyrolusite: from Powells Fort mine near Woodstock. Northampton County, Virginia. 1918.
Dates
Date Taken
1918
Summary
Crystalline manganite and pyrolusite: bladed tabular orthorhombic crystals of pyrolusite, from Powells Fort mine near Woodstock, Northampton County, Virginia. 1918. Plate 6- B in U.S. Geological Survey Bulletin 737. 1923.
Summary
Crystalline manganite and pyrolusite: bladed tabular orthorhombic crystals of pyrolusite, from Powells Fort mine near Woodstock, Northampton County, Virginia. 1918. Plate 6- B in U.S. Geological Survey Bulletin 737. 1923.
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