Button (Girvanellas) of manganese oxide from the Montgomery mine. Independence County, Arkansas. 1918.
Dates
Date Taken
1918
Summary
Button (Girvanellas) of manganese oxide from the Montgomery mine, top view; two-thirds natural size. Independence County, Arkansas. 1918. Plate 11-B in U.S. Geological Survey. Bulletin 734. 1923.
Summary
Button (Girvanellas) of manganese oxide from the Montgomery mine, top view; two-thirds natural size. Independence County, Arkansas. 1918. Plate 11-B in U.S. Geological Survey. Bulletin 734. 1923.
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