The Pyrenees: glacial landforms from the Bølling–Allerød Interstadial (14.6–12.9 ka)
| Autor: | Magali Delmas, Marc Oliva, Yanni Gunnell, Marcelo Fernandes, Théo Reixach, José M. Fernández-Fernández, Marc Calvet |
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| Přispěvatelé: | Histoire naturelle de l'Homme préhistorique (HNHP), Muséum national d'Histoire naturelle (MNHN)-Université de Perpignan Via Domitia (UPVD)-Centre National de la Recherche Scientifique (CNRS), University of Barcelona, Environnement, Ville, Société (EVS), École normale supérieure de Lyon (ENS de Lyon)-École des Mines de Saint-Étienne (Mines Saint-Étienne MSE), Institut Mines-Télécom [Paris] (IMT)-Institut Mines-Télécom [Paris] (IMT)-Université Lumière - Lyon 2 (UL2)-Université Jean Moulin - Lyon 3 (UJML), Université de Lyon-Université de Lyon-Institut National des Sciences Appliquées de Lyon (INSA Lyon), Université de Lyon-Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Université Jean Monnet - Saint-Étienne (UJM)-École Nationale des Travaux Publics de l'État (ENTPE)-École nationale supérieure d'architecture de Lyon (ENSAL)-Centre National de la Recherche Scientifique (CNRS), University Institute of Lisbon (ISCTE), Universidad Complutense de Madrid = Complutense University of Madrid [Madrid] (UCM) |
| Rok vydání: | 2023 |
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| Zdroj: | European Glacial Landscapes European Glacial Landscapes, Elsevier, pp.361-368, 2023, 978-0-323-91899-2. ⟨10.1016/B978-0-323-91899-2.00050-4⟩ |
| DOI: | 10.1016/b978-0-323-91899-2.00050-4 |
| Popis: | International audience; The Bølling–Allerød (B-A) Interstadial (14.6–12.9 ka) was a period of intense glacier recession in the Pyrenees. All available proxies indicate that environmental conditions became substantially wetter and warmer than during the preceding post-LGM interval between 18.9 and 14.6 ka (early Last Glacial to Interglacial transition, LGIT). Most of the Pyrenean trunk glaciers vanished, being confined to the cirques and promoting the onset of paraglacial rock slope failures and the formation of rock glaciers. At lower elevations, forest expansion promoted a sharp decrease in catchment erosion rates. Braided glaciofluvial stream channels narrowed and gave way to meandering river styles. The detailed chronology of deglaciation during those 1700 years of rapid change has been documented for only a very small number of valleys, mostly relying on 10Be or 36Cl exposure ages obtained from glacially-polished bedrock steps on valley floors, with also a few results from ice-marginal boulders and/or rock glaciers. A period of glacier re-expansion occurred at the end of the B-A Interstadial in response to decreasing temperatures heralding the Younger Dryas. |
| Databáze: | OpenAIRE |
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