The Pyrenees: glacial landforms from the Younger Dryas (12.9–11.7 ka) - Université de Perpignan Via Domitia Accéder directement au contenu
Chapitre D'ouvrage Année : 2023

The Pyrenees: glacial landforms from the Younger Dryas (12.9–11.7 ka)

Résumé

As elsewhere around the North Atlantic, and throughout most European mountains, the Younger Dryas (YD: 12.9–11.7 ka) corresponded in the Pyrenees to a short period of cold climate, less intense than at the time of the Oldest Dryas (~18.9–14.6 ka) but notably colder than at the time of the Bølling–Allerød Interstadial (14.6–12.9 ka). The response of Pyrenean glaciers to the YD cold spike has been documented in just ten sites, mostly by 10Be and 36Cl exposure ages obtained from glacially-polished bedrock steps on valley floors, with only a few exposure ages from moraines and rock glaciers. Despite some uncertainty over age precision (mainly ascribable to uncertainty concerning past snow cover), all existing evidence indicates that YD glaciers, where present, prevailed mostly in the central and western Pyrenees and never exceeded lengths of 2–6 km. Ongoing deglaciation favoured paraglacial readjustments on cirque headwalls, promoting the widespread development of rock glaciers and, more locally, debris-covered glaciers.
Fichier principal
Vignette du fichier
Chapitre 56 pour HAL.pdf (2.05 Mo) Télécharger le fichier
Origine : Fichiers produits par l'(les) auteur(s)
Licence : CC BY - Paternité

Dates et versions

hal-03989979 , version 1 (28-04-2023)

Identifiants

Citer

Magali Delmas, Marc Oliva, Yanni Gunnell, Théo Reixach, Marcelo Fernandes, et al.. The Pyrenees: glacial landforms from the Younger Dryas (12.9–11.7 ka). European Glacial Landscapes, Elsevier, pp.541-552, 2023, 978-0-12-823498-3. ⟨10.1016/B978-0-323-91899-2.00038-3⟩. ⟨hal-03989979⟩
19 Consultations
30 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More