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Paraná Valles is a valley in the Margaritifer Sinus quadrangle (MC-19) region of Mars, located at approximately 23.1° South and 10.2° West. It is 350 km long and was named after an ancient and modern name for a South American river (Brazil, Argentina). A low area between Paraná Valles and Loire Valles is believed to have once held a lake.
References
Paraná Valles Wikipedia(Text) CC BY-SA