Constraining the Age of Superimposed Glacial Records in Mountain Environments with Multiple Dating Methods (Cantabrian Mountains, Iberian Peninsula)

• Published in: Quaternary Science Reviews
• Main Authors: Rodr'Iguez-Rodr'Iguez, Laura, Dom'Inguez-Cuesta, Mar'Ia José, Rinterknecht, Vincent, Jiménez-Sánchez, Montserrat, González-Lemos, Saúl, Léanni, Laëtitia, Sanjurjo, Jorge, Ballesteros, Daniel, Valenzuela, Pablo, Llana-Fúnez, Sergio
• Other Authors: Laboratoire de géographie physique : Environnements Quaternaires et Actuels (LGP), Université Paris 1 Panthéon-Sorbonne (UP1)-Université Paris-Est Créteil Val-de-Marne - Paris 12 (UPEC UP12)-Centre National de la Recherche Scientifique (CNRS), Universidad de Oviedo = University of Oviedo, Centre Européen de Recherche et d'Enseignement des Géosciences de l'Environnement (CEREGE), Institut de Recherche pour le Développement (IRD)-Institut National de la Recherche Agronomique (INRA)-Aix Marseille Université (AMU)-Collège de France (CdF (institution))-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS), University of A Coruña (UDC), 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), Ministerio de Economia, Industria y Cornpetitividad - Gobierno de Espana; European Regional Development Fund through project CANDELA CGL2012-31938, PCTI - Gobierno del Principado de Asturias (Spain); European Regional Development Fund (GEOCANTABRICA) FC-15-GRUPIN14-044, INSU/CNRS; French MESR; CEA institute; Marie Curie-Clarin COFUND program by Gobierno del Principado de Asturias through FICYT; European Union/Marie Curie Actions ACA-17-19
• Format: Article in Journal/Newspaper
• Language: English
• Published: HAL CCSD 2018
• Subjects: Be-10 surface exposure dating; Radiocarbon; Optically stimulated luminescence; Last glacial maximum; Cantabrian mountains; Iberian peninsula; Glaciation; [SHS]Humanities and Social Sciences; [SDE]Environmental Sciences; North Atlantic
• Online Access: https://hal.science/hal-02477300; https://doi.org/10.1016/j.quascirev.2018.07.025

International audience Numerous cases of timing differences between glacier advances recorded in mountain environments have been documented over the last decade, usually suggesting potential age conflicts between the different dating techniques. The frequent use of a single technique to date numerically a given glacial sequence makes it difficult to address to what extent age differences can be an artifact related to biased numerical age results or a paleoclimate signature. Here we present a new set of 43 numerical ages based on three dating techniques -Be-10 surface exposure dating; radiocarbon; and optically stimulated luminescence-that complement the chronology of Pleistocene glacial advances in the Porma valley, in the central Cantabrian Mountains of Spain. Results compliment previous chronologies in the area, supporting an important glacial advance during Marine Isotope Stage 3 (Stage Ila: similar to 56 ka) that culminated with the Last Glacial Maximum advance (Stage llb: similar to 33-24 ka) of MIS 2 in response to increased rainfall and solar insolation minima. Glacier fronts reached elevations as low as 1130 m a.s.l. possibly without overriding evidence related to the previous Pleistocene glacial maximum extent. Glacier recession in the Cantabrian Mountains started at 21-20 ka ago, after the global LGM. We suggest that the recession was initiated by increased insolation followed by hyper-cool and dry conditions during Heinrich Stadial 1 in response to meltwater discharges in the North Atlantic.