The late Pleistocene and Holocene glaciation in the Pyrenees: A critical review and new evidence from 10Be exposure ages, south-central Pyrenees.
A compilation and a critical assessment of the 14C data set available show that the chronology of glacial events in the Pyrenees is not well constrained. After reviewing the literature on glacial reconstruction, we suggest a simplified subdivision of the Pyrenean last glacial cycle record into Last...
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ftubarcepubl:oai:diposit.ub.edu:2445/163388 2024-02-11T10:04:01+01:00 The late Pleistocene and Holocene glaciation in the Pyrenees: A critical review and new evidence from 10Be exposure ages, south-central Pyrenees. Pallàs i Serra, Raimon Rodés Bolumburu, Ángel Braucher, Régis Carcaillet, J. Ortuño Candela, María Bordonau i Ibern, Jaume Bourlès, Didier Vilaplana, Joan Manuel Masana, Eulàlia Santanach i Prat, Pere F., 1946- 2006 59 p. application/pdf http://hdl.handle.net/2445/163388 eng eng Elsevier Ltd Versió postprint del document publicat a: https://doi.org/10.1016/j.quascirev.2006.04.004 Quaternary Science Reviews, 2006, vol. 25, num. 21-22, p. 2937-2963 Articles publicats en revistes (Dinàmica de la Terra i l'Oceà) https://doi.org/10.1016/j.quascirev.2006.04.004 0277-3791 http://hdl.handle.net/2445/163388 533939 (c) Elsevier Ltd, 2006 info:eu-repo/semantics/openAccess Paleoclimatologia Plistocè Holocè Pirineus Paleoclimatology Pleistocene Holocene Pyrenees info:eu-repo/semantics/article info:eu-repo/semantics/acceptedVersion 2006 ftubarcepubl https://doi.org/10.1016/j.quascirev.2006.04.004 2024-01-24T01:12:04Z A compilation and a critical assessment of the 14C data set available show that the chronology of glacial events in the Pyrenees is not well constrained. After reviewing the literature on glacial reconstruction, we suggest a simplified subdivision of the Pyrenean last glacial cycle record into Last Pleniglacial, Deglaciation, and Neoglacial. To improve the numerical glacial chronology, we provide 10Be surface exposure ages for 5 glacial erosion surfaces, 9 moraines and 2 erratics in the Upper Noguera Ribagorc-ana Valley (south-central Pyrenees). Published corrected 14C data and new 10Be exposure ages indicate that the major phase of moraine building recorded in this valley during the Last Pleniglacial probably occurred after 25 ka BP. This age calls in question the generally accepted hypothesis of a very early deglaciation of the Pyrenees ca 70-40 ka BP, and strongly suggests that the Pyrenees could have been in pleniglacial conditions during the Last Glacial Maximum (LGM). However, we do not exclude the possibility that the maximum glacier extent during the last glacial cycle had taken place much earlier than the LGM, as indicated by some published U-Th, AMS 14C and OSL data. We suggest that pleniglacial conditions could have taken place during a longer (b30-20 ka) period than generally assumed, and that the Last Pleniglacial could include several glacier fluctuations recorded irregularly in different valleys, with a last major glacier readvance taking place around the LGM. In addition, the Deglaciation is represented by a series of moraines deposited between ca 13.770.9 and 10.170.6 ka. This moraine series indicates a highly variable climatic pattern that is partly correlated with Greenland Stadial 1 (the Younger Dryas), and suggests that the Deglaciation could have continued into the early Holocene. Article in Journal/Newspaper glacier Greenland Dipòsit Digital de la Universitat de Barcelona Greenland Quaternary Science Reviews 25 21-22 2937 2963 |
institution |
Open Polar |
collection |
Dipòsit Digital de la Universitat de Barcelona |
op_collection_id |
ftubarcepubl |
language |
English |
topic |
Paleoclimatologia Plistocè Holocè Pirineus Paleoclimatology Pleistocene Holocene Pyrenees |
spellingShingle |
Paleoclimatologia Plistocè Holocè Pirineus Paleoclimatology Pleistocene Holocene Pyrenees Pallàs i Serra, Raimon Rodés Bolumburu, Ángel Braucher, Régis Carcaillet, J. Ortuño Candela, María Bordonau i Ibern, Jaume Bourlès, Didier Vilaplana, Joan Manuel Masana, Eulàlia Santanach i Prat, Pere F., 1946- The late Pleistocene and Holocene glaciation in the Pyrenees: A critical review and new evidence from 10Be exposure ages, south-central Pyrenees. |
topic_facet |
Paleoclimatologia Plistocè Holocè Pirineus Paleoclimatology Pleistocene Holocene Pyrenees |
description |
A compilation and a critical assessment of the 14C data set available show that the chronology of glacial events in the Pyrenees is not well constrained. After reviewing the literature on glacial reconstruction, we suggest a simplified subdivision of the Pyrenean last glacial cycle record into Last Pleniglacial, Deglaciation, and Neoglacial. To improve the numerical glacial chronology, we provide 10Be surface exposure ages for 5 glacial erosion surfaces, 9 moraines and 2 erratics in the Upper Noguera Ribagorc-ana Valley (south-central Pyrenees). Published corrected 14C data and new 10Be exposure ages indicate that the major phase of moraine building recorded in this valley during the Last Pleniglacial probably occurred after 25 ka BP. This age calls in question the generally accepted hypothesis of a very early deglaciation of the Pyrenees ca 70-40 ka BP, and strongly suggests that the Pyrenees could have been in pleniglacial conditions during the Last Glacial Maximum (LGM). However, we do not exclude the possibility that the maximum glacier extent during the last glacial cycle had taken place much earlier than the LGM, as indicated by some published U-Th, AMS 14C and OSL data. We suggest that pleniglacial conditions could have taken place during a longer (b30-20 ka) period than generally assumed, and that the Last Pleniglacial could include several glacier fluctuations recorded irregularly in different valleys, with a last major glacier readvance taking place around the LGM. In addition, the Deglaciation is represented by a series of moraines deposited between ca 13.770.9 and 10.170.6 ka. This moraine series indicates a highly variable climatic pattern that is partly correlated with Greenland Stadial 1 (the Younger Dryas), and suggests that the Deglaciation could have continued into the early Holocene. |
format |
Article in Journal/Newspaper |
author |
Pallàs i Serra, Raimon Rodés Bolumburu, Ángel Braucher, Régis Carcaillet, J. Ortuño Candela, María Bordonau i Ibern, Jaume Bourlès, Didier Vilaplana, Joan Manuel Masana, Eulàlia Santanach i Prat, Pere F., 1946- |
author_facet |
Pallàs i Serra, Raimon Rodés Bolumburu, Ángel Braucher, Régis Carcaillet, J. Ortuño Candela, María Bordonau i Ibern, Jaume Bourlès, Didier Vilaplana, Joan Manuel Masana, Eulàlia Santanach i Prat, Pere F., 1946- |
author_sort |
Pallàs i Serra, Raimon |
title |
The late Pleistocene and Holocene glaciation in the Pyrenees: A critical review and new evidence from 10Be exposure ages, south-central Pyrenees. |
title_short |
The late Pleistocene and Holocene glaciation in the Pyrenees: A critical review and new evidence from 10Be exposure ages, south-central Pyrenees. |
title_full |
The late Pleistocene and Holocene glaciation in the Pyrenees: A critical review and new evidence from 10Be exposure ages, south-central Pyrenees. |
title_fullStr |
The late Pleistocene and Holocene glaciation in the Pyrenees: A critical review and new evidence from 10Be exposure ages, south-central Pyrenees. |
title_full_unstemmed |
The late Pleistocene and Holocene glaciation in the Pyrenees: A critical review and new evidence from 10Be exposure ages, south-central Pyrenees. |
title_sort |
late pleistocene and holocene glaciation in the pyrenees: a critical review and new evidence from 10be exposure ages, south-central pyrenees. |
publisher |
Elsevier Ltd |
publishDate |
2006 |
url |
http://hdl.handle.net/2445/163388 |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
glacier Greenland |
genre_facet |
glacier Greenland |
op_relation |
Versió postprint del document publicat a: https://doi.org/10.1016/j.quascirev.2006.04.004 Quaternary Science Reviews, 2006, vol. 25, num. 21-22, p. 2937-2963 Articles publicats en revistes (Dinàmica de la Terra i l'Oceà) https://doi.org/10.1016/j.quascirev.2006.04.004 0277-3791 http://hdl.handle.net/2445/163388 533939 |
op_rights |
(c) Elsevier Ltd, 2006 info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1016/j.quascirev.2006.04.004 |
container_title |
Quaternary Science Reviews |
container_volume |
25 |
container_issue |
21-22 |
container_start_page |
2937 |
op_container_end_page |
2963 |
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1790600443514060800 |