Polished sections of ore: Gangue is quartz, Gold King mine. La Plata County, Colorado. 1936.
Dates
Date Taken
1936
Summary
Photomicrograph of polished sections of ore: Intergrowth of krennerite and native tellurium; specimen etched with concentrated HNO3; cleavage pattern produced by etching is characteristic of krennerite. Gangue is quartz; reflected light 180 x. Gold King mine. Photo by F.W. Galbraith. La Plata County, Colorado. Circa 1936. Plate 11-A, in U.S.Geological Survey Professional paper 219. 1949.
Summary
Photomicrograph of polished sections of ore: Intergrowth of krennerite and native tellurium; specimen etched with concentrated HNO3; cleavage pattern produced by etching is characteristic of krennerite. Gangue is quartz; reflected light 180 x. Gold King mine. Photo by F.W. Galbraith. La Plata County, Colorado. Circa 1936. Plate 11-A, in U.S.Geological Survey Professional paper 219. 1949.
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