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GREEN VALLEY’S ASARCO DISCOVERY MINE TOUR SHOWS THE BEST AND WORST OF COPPER MINES AND THE ART OF HARDROCK MINING » The Beauty of the Grand Canyon?

Many prefer this view to that of the Grand Canyon say tour leaders at the ASARCO Mineral Discovery Center six miles south of Green Valley, Az

Published March 27, 2012 at 1429 × 949 in GREEN VALLEY’S ASARCO DISCOVERY MINE TOUR SHOWS THE BEST AND WORST OF COPPER MINES AND THE ART OF HARDROCK MINING

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