A glacial lake outburst flood associated with recent mountain glacier retreat, Patagonian Andes

S Harrison, N Glasser, V Winchester, E Haresign, C Warren, K Jansson

    Research output: Contribution to journalArticlepeer-review

    72 Citations (Scopus)

    Abstract

    Geomorphological mapping, sedimentology, lichenometry and dendrochronology were used to assess the nature and timing of glacier recession, moraine development and catastrophic mass movements in a tributary of the Leones valley, east of the Hielo Patagonico Norte, Chile. We show that during the 'Little Ice Age' Glaciar Calafate advanced downvalley to produce a terminal moraine. Recession of the glacier from this position occurred in the 1870s and produced a moraine dammed lake. In late 2000 a large rockfall into the lake breached the moraine and triggered a glacial lake outburst flood ( GLOF) that entrained and subsequently deposited some 2 x 10(6) m(3) of material. We interpret this event as a delayed paraglacial response to the retreat of Glaciar Calafate during the twentieth century.

    Original languageEnglish
    Pages (from-to)611-620
    Number of pages10
    JournalThe Holocene
    Volume16
    DOIs
    Publication statusPublished - Jun 2006

    Keywords

    • glacier
    • Patagonia
    • mass movement
    • glacial lake outburst flood (GLOF)
    • `Little Ice Age'
    • paraglacial
    • CHILEAN PATAGONIA
    • BRITISH-COLUMBIA
    • CLIMATE-CHANGE
    • NEW-ZEALAND
    • MORAINE
    • LICHENOMETRY
    • ENVIRONMENTS
    • ICEFIELD
    • DEPOSITS
    • RATES

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