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 Patago´nico 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 /106 m3 of material. We interpret this event as a delayed
paraglacial response to the retreat of Glaciar Calafate during the twentieth century.
Original language | English |
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Pages (from-to) | 611-620 |
Number of pages | 10 |
Journal | Holocene |
Volume | 16 |
Issue number | 4 |
DOIs | |
Publication status | Published - 2006 |
Keywords
- glacier
- Patagonia
- mass movement
- glacial lake outburst flood (GLOF)
- 'Little Ice Age'
- paraglacial