BackgroundThe stratovolcano edifice of Calbuco is elongated in a SW-NE direction and is the result of a complex history, creating 4 major units:
Calbuco-1: the oldest volcanic edifice which is now eroded and only outcrops in deep gullies.
Calbuco-2: the main cone of Calbuco volcano, which consists of interbedded lavas and breccias. This edifice was truncated by a a 3 km3 debris avalanche to the NNW following a violent plinian eruption.
Calbuco-3: the complex of lava flows and domes on the northern flank emplaced after the debris avalanche. This unit partially fills the scar of the avalanche.
Calbuco-4: the historical lava dome and associated lava flows produced during the eruptions of 1893-94, 1917, 1929 and 1961.
- Smithsonian / GVP volcano information
- López-Escobar et al (1995) "Calbuco Volcano and minor eruptive centers distributed along the Liquiñe-Ofqui Fault Zone, Chile (41°–42° S): contrasting origin of andesitic and basaltic magma in the Southern Volcanic Zone of the Andes", Contributions to Mineralogy and Petrology, v 119 (4), pp 345-361
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