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Salinas Grandes is the name of a "salar", a salt lake, in the north-west of Argentina.

It covers an area of ​​212 km2 in the district of Tumbaya (Jujuy) and La Poma (Salta) at an average altitude of 3450 meters. Despite the high altitude, the Salinas Grandes are the base level of an endorheic basin that continues northward in the lakes of Guayatayoc, heavily salted. To the south and east, these salt marshes are separated from the Quebrada de Humahuaca with the mountains of Chani, while the north and west boundaries arrive at the desert of the Puna Salata. The origin of the Salinas Grandes of Jujuy and Salta is located between 5 and 10 million years. In this period the pool of existing saline water was covered with plenty of salt due to 'volcanic activity. The gradual evaporation of water gave rise to this "salar" which has a crust of average thickness of 30 cm. (Wikipedia)

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