期刊
HOLOCENE
卷 16, 期 4, 页码 611-620出版社
SAGE PUBLICATIONS LTD
DOI: 10.1191/0959683606hl957rr
关键词
glacier; Patagonia; mass movement; glacial lake outburst flood (GLOF); `Little Ice Age'; paraglacial
资金
- Natural Environment Research Council [NER/B/S/2002/00282] Funding Source: researchfish
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.
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