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Three metallogenetic belts are distinguished, each related to a major geosynclinal orogenic-magmatic belt--an easterly Precambrian belt, a central belt of Hercynian deformation and mineralization, and a western Laramide belt. Late Tertiary deposits are scattered without regard to these earlier mobile belts. Quaternary volcanism along the Andean crest gave rise to sulfur and borate deposits.
This record provided courtesy of AGI/GeoRef.
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