Pastos Grandes caldera

Pastos Grandes Caldera
Laguna Pastos Grandes, probably a remainder of the Pastos Grandes Caldera Lake. Resurgent center on the South (highest point not shown), caldera scarps on the right side of the laguna.
Highest point
Elevation	4,600 m (15,100 ft) (avg)
Listing	List of volcanoes in Bolivia
Coordinates	21°40′S 67°51′W / 21.667°S 67.850°W / -21.667; -67.850Coordinates: 21°40′S 67°51′W / 21.667°S 67.850°W / -21.667; -67.850
Geography
Location	Potosí Department, Bolivia
Geology
Mountain type	Caldera
Volcanic arc/belt	Altiplano–Puna volcanic complex

Pastos Grandes Caldera or Cerro Pastos Grandes (a resurgent centre) is an old caldera in the Potosí Department, Bolivia, which belongs to the Altiplano–Puna volcanic complex. Lagunas Pastos Grandes, Khara and Cachi may be remnants of a greater caldera lake. Size of the caldera: 50 km x 40 km. A large (VEI 7) eruption c. 2.9 million years ago produced 820 cubic kilometers (197 cu mi) of tephra.