Geomorphic Records along the General Carrera (Chile)–Buenos Aires (Argentina) Glacial Lake (46°–48°S), Climate Inferences, and Glacial Rebound for the Past 7–9 ka: A discussion

Joseph Martinod 1 Bernard Pouyaud 2 Sebastien Carretier 3 Benjamin Guillaume 4 Gérard Hérail 1
1 LMTG - Laboratoire des Mécanismes et Transfert en Géologie
2 HSM - Hydrosciences Montpellier
3 GET - Géosciences Environnement Toulouse
4 GR - Géosciences Rennes
Abstract : The article by Bourgois et al. (2016) presents new cosmogenic isotope concentration data that permit them to propose a scenario for the postglacial evolution of Lago General Carrera/Buenos Aires (LGCBA). In this comment, we do not discuss the validity of the proposed ages, although ages deduced from cosmogenic isotope concentrations may be affected by complex history, particularly when they are obtained in erratic boulders or dropstones (Putkonen and Swanson 2003; Delmas et al. 2011). We simply note here basic geomorphological evidence challenging the complex scenario proposed by Bourgois et al. (2016) and showing that LGCBA has never been endorheic following the retreat of the main glacial tongue. This observation has significant implications for the postglacial climatic evolution of that area.
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Submitted on : Tuesday, August 23, 2016 - 10:35:48 AM
Last modification on : Friday, January 10, 2020 - 9:09:56 PM

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Joseph Martinod, Bernard Pouyaud, Sebastien Carretier, Benjamin Guillaume, Gérard Hérail. Geomorphic Records along the General Carrera (Chile)–Buenos Aires (Argentina) Glacial Lake (46°–48°S), Climate Inferences, and Glacial Rebound for the Past 7–9 ka: A discussion. Journal of Geology, University of Chicago Press, 2016, 124 (5), pp.631-635. ⟨10.1086/687550⟩. ⟨insu-01355379⟩

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