Specimen of iron oxide with pyrite and chalcopyrite: vein of magnetite in pyrite, from Peacock copper mine; dark areas magnetite. Utah. 1908.
Dates
Date Taken
1908
Summary
Specimen of iron oxide with pyrite and chalcopyrite: vein of magnetite in pyrite, from Peacock copper mine; dark areas magnetite. Utah. 1908. Plate 33-A, three-fourths natural size, in U.S. Geological Survey. Professional paper 80. 1913.
Summary
Specimen of iron oxide with pyrite and chalcopyrite: vein of magnetite in pyrite, from Peacock copper mine; dark areas magnetite. Utah. 1908. Plate 33-A, three-fourths natural size, in U.S. Geological Survey. Professional paper 80. 1913.
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