Pastos Grandes caldera

Pastos Grandes caldera

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 eruption occurred 2.9 mio. years ago; VEI 7; more than 820 cubic kilometers (197 cu mi) of tethra.

References

• Baker, M.C.W., 1981. The nature and distribution of upper Cenozoic ignimbrite centres in the Central Andes. J. Volcanol. Geotherm. Res. v11, p. 293-315.

• de Silva, S.L., & Francis, P.W., 1989. Correlation of large ignimbrites - two case studies from the Central Andes of N. Chile. J. Volcanol. Geotherm. Res. v37, no.2, p. 133-149.

• Francis, P.W., & Baker, M.C.W., 1978. Sources of two large-volume ignimbrites in the Central Andes: Some Landsat evidence. J. Volcanol. Geotherm. Res. v.4, p. 81-87.

• Ort, M. H.; de Silva, S.; Jiminez, N.; Salisbury, M.; Jicha, B. R. and Singer, B. S. (2009). Two new supereruptions in the Altiplano-Puna Volcanic Complex of the Central Andes.
• Pastos Grandes