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Volcanic field Descabezado Grande - Cerro Azul

View in E direction to the reservoir Lago Colbún in the right foreground of the photograph. The bright zone in the Andean landscape represents volcanic deposits with a high content of siliciom dioxide. The source of this material is not only the Volcán Descabezado Grande (3953 m, in the centre of the field), but mainly a secondary vent of Cerro Azul (at the right edge of the field). A huge eruption occurred there in 1932.