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The top documents tagged [southern chihuahua]
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NAICA - CRYSTAL CAVE
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New Mexico Historical Review
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The largest natural crystals on Earth have been discovered in two caves within a silver and zinc mine near Naica, in Chihuahua, Mexico, according to
214 views
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Naica Crystal Caves
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Initial Investigations at the Round Mountain Cerro de Trincheras Site in Southeastern Arizona John R. Roney (Colinas Cultural Resources) Robert J. Hard
217 views