Guanajuato Silver, Mexico
August 1999 by Edgar B. Heylmun, PhDFor 250 years, the Guanajuato Mining District of Mexico produced 20% of the world's silver. The old colonial city of Guanajuato (pop.100,000) is wedged in a narrow canyon in the Sierra de Guanajuato, at an average elevation of 6,750 feet.
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