Pastos Grandes

21°45′S 67°50′W / 21.750°S 67.833°W / -21.750; -67.833 Pastos Grandes is the name of a caldera and its crater lake in Bolivia. The caldera is part of the Altiplano-Puna volcanic complex, a large ignimbrite province that is part of the Central Volcanic Zone of the Andes. Pastos Grandes has erupted a number of ignimbrites through its history, some of which exceeded a volume of 1,000 cubic kilometres (240 cu mi). After the ignimbrite phase, the lava domes of the Cerro Chascon-Runtu Jarita complex were erupted close to the caldera and along faults.

The caldera is the site of a few lakes, some of which are fed by hot springs. A number of minerals, including lithium, are dissolved in the lakes.

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