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From The Mineralogical Record, Volume 14, No. 2, March-April, 1983: “The Old Yuma mine, near Tucson, has produced North America’s finest vanadinite specimens and is also well known for large and beautiful yellow wulfenite crystals. Sizeable pockets of these minerals have been found since the 1880’s and are still being found today.” Continue Reading
The Stevens mine is located in the Argentine district of Clear Creek County, Colorado. The mine was notable for the very difficult location of the vein that was at about 12,500 feet in elevation on the face of a cliff on McClellan mountain. Continue Reading
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Arizona’s Kofa district was a significant producer of gold between 1897 and 1911. This article summarizes the history of the two primary mines of the district – the King of Arizona and the North Star. Featuring the photography of Owen Kennedy. Continue Reading
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The Encampment district is notable for the sixteen-mile-long aerial tram that linked the mill and smelter at the town of Encampment with the Ferris-Haggarty mine. At the time it was completed in 1902 it was the longest aerial tramway in the world. Grand Encampment: A Wyoming Copper District examines the history and mining towns of this Wyoming copper district. Continue Reading
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Processing ore from the great mines of Butte, Montana required significant industrial capacity spread over a large area of the state. With over 30 photos, this article takes a detailed look at the massive facility known as the Great Falls Reduction Department, where copper and zinc were refined into finished products. Continue Reading
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Encampment, Wyoming was the economic center of the Encampment copper district in southern Wyoming. The town was founded in 1897 and had its best days between 1902 and 1907 when the population topped 3,000. This members-only photo collection contains over 20 images from Encampment’s mining days. Continue Reading
