Río Tinto, Ríotintoboth: rē´ō tēn´tō [key], or Minas de Ríotintomē´näs dā [key], town (1990 pop. 5,934), Huelva prov., SW Spain, in the Sierra Morena Mts., in Andalusia. It is the center of the Río Tinto mining region, named for the river which crosses it. Known since Phoenician times, the area has copper deposits and some iron and manganese.
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