Photomicrograph of zinc sulphide, Horn Silver Mine: same specimen shown in Butler 125, with crossed nicols; light areas wurtzite, surrounding a center of sphalerite. Utah.1908.
Dates
Date Taken
1908
Summary
Photomicrograph of zinc sulphide, Horn Silver Mine: same specimen shown in Butler 125, with crossed nicols; light areas wurtzite, surrounding a center of sphalerite. Utah. 1908. Plate 25-D, enlarged 43 diameters, in U.S. Geological Survey. Professional paper 80. 1913. Plate 24-D in U.S. Geological Survey. Professional paper 111. 1920.
Summary
Photomicrograph of zinc sulphide, Horn Silver Mine: same specimen shown in Butler 125, with crossed nicols; light areas wurtzite, surrounding a center of sphalerite. Utah. 1908. Plate 25-D, enlarged 43 diameters, in U.S. Geological Survey. Professional paper 80. 1913. Plate 24-D in U.S. Geological Survey. Professional paper 111. 1920.
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