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Cerro Galan Volcano - John Seach
Argentina
25.98 S, 66.93 W
summit elevation 6100 m
Caldera
Cerro Galan Caldera is located in an arid region of Catamarca province, NW Argentina. The caldera is elliptical in shape, 40 x 24 km in diameter. The floor of the caldera is at an altitude of 4500 m. Cerro Galan is one of the world's largest calderas, and was only identified from satellite photos.
The caldera contains well defined ring fractures.
The formation of the caldera was associated with the eruption of 1000 cubic kilometers of ignimbrites. The ignimbrites are fine grained, and lack lithic clasts and pumice.
Cerro Galan Volcano Eruptions
Undated eruptions.