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Late Holocene history of Chaitén Volcano: New evidence for a 17th century eruption Translated title: Historia holoceno tardía del volcán Chaitén: nueva evidencia de una erupción en el siglo XVII

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      Abstract

      Prior to May 2008, it was thought that the last eruption of Chaitén Volcano occurred more than 5,000 years ago, a rather long quiescent period for a volcano in such an active arc segment. However, increasingly more Holocene eruptions are being identified. This article presents both geological and historical evidence for late Holocene eruptive activity in the 17th century (AD 1625-1658), which included an explosive rhyolitic eruption that produced pumice ash fallout east of the volcano and caused channel aggradation in the Chaitén River. The extents of tephra fall and channel aggradation were similar to those of May 2008. Fine ash, pumice and obsidian fragments in the pre-2008 deposits are unequivocally derived from Chaitén Volcano. This finding has important implications for hazards assessment in the area and suggests the eruptive frequency and magnitude should be more thoroughly studied.

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      Most cited references 34

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      Bayesian Analysis of Radiocarbon Dates

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        Sediment yield following severe volcanic disturbance—A two-decade perspective from Mount St. Helens

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          Fluvial sediment transport and deposition following the 1991 eruption of Mount Pinatubo

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            Author and article information

            Affiliations
            [1 ] Servicio Nacional de Geología y Minería Chile
            [2 ] Universidad Adolfo Ibáñez Chile
            [3 ] United States Geological Survey USA
            Contributors
            Role: ND
            Role: ND
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            Journal
            andgeol
            Andean geology
            AndGeo
            Servicio Nacional de Geología y Minería (SERNAGEOMIN) (Santiago )
            0718-7106
            May 2013
            : 40
            : 2
            : 249-261
            S0718-71062013000200004
            10.5027/andgeoV40n2-a04

            http://creativecommons.org/licenses/by/4.0/

            Product
            Product Information: SciELO Chile
            Categories
            GEOLOGY
            GEOSCIENCES, MULTIDISCIPLINARY

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