10Be chronology of deglaciation and ice-dammed lake regression in the vicinity of the Mylodon Cave (Cerro Benítez, Patagonia, Chile)
International audience Located 51.5°S in the vicinity of the Southern Patagonian Ice Field, Cerro Benítez and the glacial valley of Lago Sofía host several caves and rock shelters that were occupied by megafauna and humans during the Late Pleistocene, including the Mylodon Cave and two of the oldest...
Published in: | Quaternary Science Reviews |
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Main Authors: | , , , , , , , , , , , |
Other Authors: | , , , , , , , , , , , , , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
HAL CCSD
2022
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Subjects: | |
Online Access: | https://shs.hal.science/halshs-03560016 https://doi.org/10.1016/j.quascirev.2021.107354 |
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ftccsdartic:oai:HAL:halshs-03560016v1 |
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record_format |
openpolar |
institution |
Open Polar |
collection |
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) |
op_collection_id |
ftccsdartic |
language |
English |
topic |
Pleistocene Glaciation South America Cosmogenic isotopes Geomorphology Glacial Chronological modelling Mylodon Cave [SHS.ARCHEO]Humanities and Social Sciences/Archaeology and Prehistory |
spellingShingle |
Pleistocene Glaciation South America Cosmogenic isotopes Geomorphology Glacial Chronological modelling Mylodon Cave [SHS.ARCHEO]Humanities and Social Sciences/Archaeology and Prehistory Girault, Igor Todisco, Dominique Çiner, Attila Sarikaya, Mehmet Akif Yildirim, Cengiz Quiquerez, Amélie Martin, Fabiana Borrero, Luis Fabel, Derek Grandjean, Philippe Nehme, Carole Mouralis, Damase 10Be chronology of deglaciation and ice-dammed lake regression in the vicinity of the Mylodon Cave (Cerro Benítez, Patagonia, Chile) |
topic_facet |
Pleistocene Glaciation South America Cosmogenic isotopes Geomorphology Glacial Chronological modelling Mylodon Cave [SHS.ARCHEO]Humanities and Social Sciences/Archaeology and Prehistory |
description |
International audience Located 51.5°S in the vicinity of the Southern Patagonian Ice Field, Cerro Benítez and the glacial valley of Lago Sofía host several caves and rock shelters that were occupied by megafauna and humans during the Late Pleistocene, including the Mylodon Cave and two of the oldest archaeological sites in Patagonia. During the last glaciation, Cerro Benítez was alternately covered by the Patagonian Ice Sheet and surrounded by an ice-dammed lake which restricted the access to the caves and rock shelters located under its uppermost level, 155 m a.s.l. This study aims to provide a detailed chronology of the deglaciation and lake regression in Cerro Benítez. The glacial fluctuations and the variations of lake level were reconstructed from multi-scale, remote-sensing data and field geomorphological mapping. In addition, we calculated the surface exposure age of 11 erratic blocks located above and on the lacustrine erosional platform using terrestrial cosmogenic 10Be in order to date ice downwasting and lake regression, respectively. Dates of ice downwasting and lake regression events were modelled from prior surface exposure ages using Bayesian statistics. The results suggest that the Patagonian Ice Sheet locally thinned by at least 300 m during MIS 3 in the aftermath of a major glacial advance. Following deglaciation, the ice-dammed lake experienced a slow local regression (ca. 2.5 mm. a−1) until 16.9 ka B2k, interpreted as the result of lake basin tilting due to differential post-glacial isostatic rebound. This initial phase of lake regression was followed by a faster regression caused by the reversal of the lake drainage between 16.9 and 15.4 ka B2k. We assess the chronological model by comparison with uplift and lakeshore erosion rates from the literature and eventually discuss the implications for megafaunal colonisation of the area. |
author2 |
Institut des Sciences de la Terre (ISTerre) Institut national des sciences de l'Univers (INSU - CNRS)-Institut de recherche pour le développement IRD : UR219-Université Savoie Mont Blanc (USMB Université de Savoie Université de Chambéry )-Centre National de la Recherche Scientifique (CNRS)-Université Gustave Eiffel-Université Grenoble Alpes (UGA) Identité et Différenciation de l’Espace, de l’Environnement et des Sociétés (IDEES) Université de Caen Normandie (UNICAEN) Normandie Université (NU)-Normandie Université (NU)-Université Le Havre Normandie (ULH) Normandie Université (NU)-Université de Rouen Normandie (UNIROUEN) Normandie Université (NU)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche Interdisciplinaire Homme et Société (IRIHS) Université de Rouen Normandie (UNIROUEN) Normandie Université (NU)-Normandie Université (NU)-Université de Rouen Normandie (UNIROUEN) Normandie Université (NU) Eurasia Institute of Earth Sciences, Istanbul Technical University, Turkey Archéologie, Terre, Histoire, Sociétés Dijon (ARTeHiS) Ministère de la Culture et de la Communication (MCC)-Université de Bourgogne (UB)-Centre National de la Recherche Scientifique (CNRS) Centro de Estudios del Hombre Austral Universidad de Magallanes (UMAG) Instituto Multidisciplinario de Historia y Ciencias Humanas, CONICET, Universidad de Buenos Aires University of Glasgow Laboratoire de Géologie de Lyon - Terre, Planètes, Environnement (LGL-TPE) École normale supérieure de Lyon (ENS de Lyon)-Université Claude Bernard Lyon 1 (UCBL) Université de Lyon-Université de Lyon-Institut national des sciences de l'Univers (INSU - CNRS)-Université Jean Monnet - Saint-Étienne (UJM)-Centre National de la Recherche Scientifique (CNRS) |
format |
Article in Journal/Newspaper |
author |
Girault, Igor Todisco, Dominique Çiner, Attila Sarikaya, Mehmet Akif Yildirim, Cengiz Quiquerez, Amélie Martin, Fabiana Borrero, Luis Fabel, Derek Grandjean, Philippe Nehme, Carole Mouralis, Damase |
author_facet |
Girault, Igor Todisco, Dominique Çiner, Attila Sarikaya, Mehmet Akif Yildirim, Cengiz Quiquerez, Amélie Martin, Fabiana Borrero, Luis Fabel, Derek Grandjean, Philippe Nehme, Carole Mouralis, Damase |
author_sort |
Girault, Igor |
title |
10Be chronology of deglaciation and ice-dammed lake regression in the vicinity of the Mylodon Cave (Cerro Benítez, Patagonia, Chile) |
title_short |
10Be chronology of deglaciation and ice-dammed lake regression in the vicinity of the Mylodon Cave (Cerro Benítez, Patagonia, Chile) |
title_full |
10Be chronology of deglaciation and ice-dammed lake regression in the vicinity of the Mylodon Cave (Cerro Benítez, Patagonia, Chile) |
title_fullStr |
10Be chronology of deglaciation and ice-dammed lake regression in the vicinity of the Mylodon Cave (Cerro Benítez, Patagonia, Chile) |
title_full_unstemmed |
10Be chronology of deglaciation and ice-dammed lake regression in the vicinity of the Mylodon Cave (Cerro Benítez, Patagonia, Chile) |
title_sort |
10be chronology of deglaciation and ice-dammed lake regression in the vicinity of the mylodon cave (cerro benítez, patagonia, chile) |
publisher |
HAL CCSD |
publishDate |
2022 |
url |
https://shs.hal.science/halshs-03560016 https://doi.org/10.1016/j.quascirev.2021.107354 |
long_lat |
ENVELOPE(-61.567,-61.567,-64.383,-64.383) ENVELOPE(-68.258,-68.258,68.496,68.496) ENVELOPE(-54.065,-54.065,49.700,49.700) |
geographic |
Benítez Dammed Lake Patagonia Tilting |
geographic_facet |
Benítez Dammed Lake Patagonia Tilting |
genre |
Ice Sheet |
genre_facet |
Ice Sheet |
op_source |
ISSN: 0277-3791 Quaternary Science Reviews https://shs.hal.science/halshs-03560016 Quaternary Science Reviews, 2022, 278, pp.107354. ⟨10.1016/j.quascirev.2021.107354⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.quascirev.2021.107354 halshs-03560016 https://shs.hal.science/halshs-03560016 doi:10.1016/j.quascirev.2021.107354 |
op_doi |
https://doi.org/10.1016/j.quascirev.2021.107354 |
container_title |
Quaternary Science Reviews |
container_volume |
278 |
container_start_page |
107354 |
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1790601619761528832 |
spelling |
ftccsdartic:oai:HAL:halshs-03560016v1 2024-02-11T10:04:52+01:00 10Be chronology of deglaciation and ice-dammed lake regression in the vicinity of the Mylodon Cave (Cerro Benítez, Patagonia, Chile) Girault, Igor Todisco, Dominique Çiner, Attila Sarikaya, Mehmet Akif Yildirim, Cengiz Quiquerez, Amélie Martin, Fabiana Borrero, Luis Fabel, Derek Grandjean, Philippe Nehme, Carole Mouralis, Damase Institut des Sciences de la Terre (ISTerre) Institut national des sciences de l'Univers (INSU - CNRS)-Institut de recherche pour le développement IRD : UR219-Université Savoie Mont Blanc (USMB Université de Savoie Université de Chambéry )-Centre National de la Recherche Scientifique (CNRS)-Université Gustave Eiffel-Université Grenoble Alpes (UGA) Identité et Différenciation de l’Espace, de l’Environnement et des Sociétés (IDEES) Université de Caen Normandie (UNICAEN) Normandie Université (NU)-Normandie Université (NU)-Université Le Havre Normandie (ULH) Normandie Université (NU)-Université de Rouen Normandie (UNIROUEN) Normandie Université (NU)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche Interdisciplinaire Homme et Société (IRIHS) Université de Rouen Normandie (UNIROUEN) Normandie Université (NU)-Normandie Université (NU)-Université de Rouen Normandie (UNIROUEN) Normandie Université (NU) Eurasia Institute of Earth Sciences, Istanbul Technical University, Turkey Archéologie, Terre, Histoire, Sociétés Dijon (ARTeHiS) Ministère de la Culture et de la Communication (MCC)-Université de Bourgogne (UB)-Centre National de la Recherche Scientifique (CNRS) Centro de Estudios del Hombre Austral Universidad de Magallanes (UMAG) Instituto Multidisciplinario de Historia y Ciencias Humanas, CONICET, Universidad de Buenos Aires University of Glasgow Laboratoire de Géologie de Lyon - Terre, Planètes, Environnement (LGL-TPE) École normale supérieure de Lyon (ENS de Lyon)-Université Claude Bernard Lyon 1 (UCBL) Université de Lyon-Université de Lyon-Institut national des sciences de l'Univers (INSU - CNRS)-Université Jean Monnet - Saint-Étienne (UJM)-Centre National de la Recherche Scientifique (CNRS) 2022 https://shs.hal.science/halshs-03560016 https://doi.org/10.1016/j.quascirev.2021.107354 en eng HAL CCSD Elsevier info:eu-repo/semantics/altIdentifier/doi/10.1016/j.quascirev.2021.107354 halshs-03560016 https://shs.hal.science/halshs-03560016 doi:10.1016/j.quascirev.2021.107354 ISSN: 0277-3791 Quaternary Science Reviews https://shs.hal.science/halshs-03560016 Quaternary Science Reviews, 2022, 278, pp.107354. ⟨10.1016/j.quascirev.2021.107354⟩ Pleistocene Glaciation South America Cosmogenic isotopes Geomorphology Glacial Chronological modelling Mylodon Cave [SHS.ARCHEO]Humanities and Social Sciences/Archaeology and Prehistory info:eu-repo/semantics/article Journal articles 2022 ftccsdartic https://doi.org/10.1016/j.quascirev.2021.107354 2024-01-21T00:31:10Z International audience Located 51.5°S in the vicinity of the Southern Patagonian Ice Field, Cerro Benítez and the glacial valley of Lago Sofía host several caves and rock shelters that were occupied by megafauna and humans during the Late Pleistocene, including the Mylodon Cave and two of the oldest archaeological sites in Patagonia. During the last glaciation, Cerro Benítez was alternately covered by the Patagonian Ice Sheet and surrounded by an ice-dammed lake which restricted the access to the caves and rock shelters located under its uppermost level, 155 m a.s.l. This study aims to provide a detailed chronology of the deglaciation and lake regression in Cerro Benítez. The glacial fluctuations and the variations of lake level were reconstructed from multi-scale, remote-sensing data and field geomorphological mapping. In addition, we calculated the surface exposure age of 11 erratic blocks located above and on the lacustrine erosional platform using terrestrial cosmogenic 10Be in order to date ice downwasting and lake regression, respectively. Dates of ice downwasting and lake regression events were modelled from prior surface exposure ages using Bayesian statistics. The results suggest that the Patagonian Ice Sheet locally thinned by at least 300 m during MIS 3 in the aftermath of a major glacial advance. Following deglaciation, the ice-dammed lake experienced a slow local regression (ca. 2.5 mm. a−1) until 16.9 ka B2k, interpreted as the result of lake basin tilting due to differential post-glacial isostatic rebound. This initial phase of lake regression was followed by a faster regression caused by the reversal of the lake drainage between 16.9 and 15.4 ka B2k. We assess the chronological model by comparison with uplift and lakeshore erosion rates from the literature and eventually discuss the implications for megafaunal colonisation of the area. Article in Journal/Newspaper Ice Sheet Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) Benítez ENVELOPE(-61.567,-61.567,-64.383,-64.383) Dammed Lake ENVELOPE(-68.258,-68.258,68.496,68.496) Patagonia Tilting ENVELOPE(-54.065,-54.065,49.700,49.700) Quaternary Science Reviews 278 107354 |