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2023-01-26

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cc-by (c) Cambridge University Press, 2023
Si us plau utilitzeu sempre aquest identificador per citar o enllaçar aquest document: https://hdl.handle.net/2445/216293

Glacial-interglacial cycles in the south-central and south-eastern Pyrenees since ~180 ka (NE Spain-Andorra-SE France)

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Recurs relacionat

https://doi.org/10.1017/qua.2022.68

Resum

This study uses luminescence and 14C accelerator mass spectrometry procedures to date relevant glaciofluvial and glacial deposits from the south-central and southeastern Pyrenees (Andorra–France–Spain). We distinguish two types of end-moraine complexes: (1) those in which at least a far-flung moraine exists beyond a frequently nested end-moraine complex (the most common) and (2) those in which a close-nested end moraine encompasses at least two glacial cycles. Both types formed within six distinctive glacial intervals: (1) A penultimate glacial cycle during Marine Oxygen Isotope Stage (MIS) 6 and older glaciofluvial terraces occurred beyond the range of the luminescence dating method. (2) An early glacial advance in MIS 5d (~97 −15/+19 ka) was followed by glacial retreat during MIS 5c (< 91 ± 9 ka). (3) The last maximum ice extent (LMIE) was in early MIS 4 (~74 ± 4.5 ka). (4) Unexpectedly, glaciers thinned during the second half of MIS 3 (~39 −6/+11 ka). (5) During the MIS 3–2 transition, glaciers subsequently fluctuated behind the LMIE limits. (6) The global last glacial maximum (LGM) started as early as ~26.6 ± 0.365 ka b2k, and the corresponding end moraines were built behind the LMIE limits or merged with it, forming close-nested moraines.

Matèries

Espectroscòpia de luminiscència, Períodes glacials, Luminescència, Pirineus

Matèries (anglès)

Luminescence spectroscopy, Glacial epoch, Luminescence, Pyrenees

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Articles publicats en revistes (Dinàmica de la Terra i l'Oceà)
Articles publicats en revistes (Geografia)

Citació

TURU, Valentí, PEÑA MONNÉ, José luis, CUNHA, Pedro p., JALUT, Guy, BUYLAERT, Jan-pieter, MURRAY, Andrew s., BRIDGLAND, David, FAURSCHOU-KNUDSEN, Mads, CARRASCO, Rosa m., ROS, Xavier, TURU-FONT, Laia, OLIVA FRANGANILLO, Marc, VENTURA ROCA, Josep. Glacial-interglacial cycles in the south-central and south-eastern Pyrenees since ~180 ka (NE Spain-Andorra-SE France). _Quaternary Research_. 2023. Vol. 113, núm. 1-28. [consulta: 23 de gener de 2026]. ISSN: 1040-6182. [Disponible a: https://hdl.handle.net/2445/216293]

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