Varieties of oxidized zinc ores, May Day mine. Juab County, Utah. 1911.
Dates
Date Taken
1911
Summary
Varieties of oxidized zinc ores; A and B finely granular or replacement smithsonite, (see photos 338 and 339 for detail description), C finely banded smithsonite-calamine ore, May Day mine. The lighter broad bands originally represented smithsonite and the darker narrow bands calamine; but this specimen much of the smithsonite has been replaced by calamine. The dark patch represents leached portions stained with films of iron and manganese oxide, natural size, D (see photo 340 for details) and E, fibrous smithsonite with hydrozincite and fibrous calcite, May Day mine. Juab County, Utah. 1911. Plate 28 in U.S. Geological Survey. Professional paper 107. 1919.
Summary
Varieties of oxidized zinc ores; A and B finely granular or replacement smithsonite, (see photos 338 and 339 for detail description), C finely banded smithsonite-calamine ore, May Day mine. The lighter broad bands originally represented smithsonite and the darker narrow bands calamine; but this specimen much of the smithsonite has been replaced by calamine. The dark patch represents leached portions stained with films of iron and manganese oxide, natural size, D (see photo 340 for details) and E, fibrous smithsonite with hydrozincite and fibrous calcite, May Day mine. Juab County, Utah. 1911. Plate 28 in U.S. Geological Survey. Professional paper 107. 1919.
This USGS product is considered to be in the U.S. public domain. For further information on the USGS Information Policies and Instructions, refer to the Copyrights and Credits section on this web page: http://www.usgs.gov/laws/info_policies.html