Cerro Guacha is a Miocene caldera in southwestern Bolivia's Sur Lípez Province. Part of the volcanic system of the Andes, it is considered to be part of the Central Volcanic Zone (CVZ), one of the three volcanic arcs of the Andes, and its associated Altiplano-Puna volcanic complex (APVC). A number of volcanic calderas occur within the latter.
Cerro Guacha and the other volcanoes of that region are formed from the subduction of the Nazca plate beneath the South America plate. Above the subduction zone, the crust is chemically modified and generates large volumes of melts that form the local caldera systems of the APVC. Guacha is constructed over a basement of sediments.
Two major ignimbrites, the 5.6-5.8 mya Guacha ignimbrite with a volume of 1,300 cubic kilometres (310 cu mi) and the 3.5-3.6 mya Tara ignimbrite with a volume of 800 cubic kilometres (190 cu mi) were erupted from Cerro Guacha. More recent activity occurred 1.7 mya and formed a smaller ignimbrite with a volume of 10 cubic kilometres (2.4 cu mi).
The larger caldera has dimensions of 60 by 40 kilometres (37 mi × 25 mi) with a rim altitude of 5,250 metres (17,220 ft). Extended volcanic activity has generated two nested calderas, a number of lava domes and lava flows and a central resurgent dome.
CerroGuacha is a Miocene caldera in southwestern Bolivia's Sur Lípez Province. Part of the volcanic system of the Andes, it is considered to be part of...
those of the Altiplano-Puna Volcanic Complex, as are Cerro Panizos, Pastos Grandes, CerroGuacha, and La Pacana. Other silicic systems are Los Frailes...
ignimbrites. La Pacana together with the CerroGuacha and Purico Complex calderas forms the La Pacana Complex. Guacha experienced two major eruptions, of which...
the ignimbrite volcanism of the APVC, with CerroGuacha and La Pacana calderas being located nearby. Cerro Bitiche is located in the area of the northern...
isotopic and single crystal 40Ar/39Ar age constraints on the evolution of the Cerro Galán ignimbrites". Bulletin of Volcanology. 73 (10): 1487–1511. Bibcode:2011BVol...
years ago, it produced the large volcanic calderas Panizos, Vilama, CerroGuacha and last Uturuncu, which shows evidence of ongoing activity. The formation...
to be the Laguna Colorada caldera, the El Tatio volcanic group, the CerroGuacha and Pastos Grandes calderas or the Altiplano-Puna Magma Body. The movement...
years BP, the Neogene period and Miocene epoch begin. CerroGuacha, Bolivia; 5.6–5.8 Ma (Guacha ignimbrite). Lord Howe Island, Australia; Mount Lidgbird...
so-called "supereruptions" with Volcanic Explosivity Indexes of 8 at CerroGuacha, La Pacana, Pastos Grandes and Vilama. Over 50 volcanoes in the region...
of the APVC. The younger Cerro Morado volcanic centre is close. It erupted later than Pairique. The ignimbrites of CerroGuacha and Coranzuli crop out northwest...
activity may still occur at Pastos Grandes. Finally, Pastos Grandes and CerroGuacha may be the heat source for the El Tatio geothermal field west of Pastos...
visible on the surface. Some better studied volcanic centres are Galán and CerroGuacha. The Los Frailes ignimbrite plateau covers a heart-shaped area of about...
needed] The volcano formed on top of the 2.89 mya Tara Ignimbrite from the Guacha caldera and the basement beneath the volcano is formed from Cretaceous and...
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