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(Article of periodic en Anglais - 2013)

Document title

Glacial and fluvial deposits in the Aragón Valley, Central-Western Pyrenees : chronology of the Pyrenean late Pleistocene glaciers

Authors(s) and Affiliation(s)

GARCÍA-RUIZ J.M. (1) ; MARTÍ-BONO C. (1) ; PEÑA-MONNÉ J.L. (2) ; SANCHO C. (3) ; RHODES E.J. (4) ; VALERO-GARCÉS B. (1) ; GONZÁLEZ-SAMPÉRITZ P. (1) ; MORENO A. (1) ;
(1) Inst. Pirenaico de Ecología, CSIC, Zaragoza, ESPAGNE
(2) Dept. of Geography, Univ., Zaragoza, ESPAGNE
(3) Dept. of Earth Sciences, Fac. of Sciences, Univ., Zaragoza, ESPAGNE
(4) Dep. of Earth and Space Sciences, Univ. of California, Los Angeles, ETATS-UNIS

Abstract

New morphological studies and absolute ages for moraines and fluvial terraces in the Aragón Valley allow a correlation with other Pyrenean glaciers and provide solid chronologies about the asynchroneity between global last glacial maximum (LGM) and the maximum ice extent (MIE). Six frontal arcs and three lateral morainic ridges were identified in the Villanúa basin terminal glacial complex. The main moraines (M1 and M2) correspond to 2 glacial stages (oxygen isotopic stages MIS 6 and MIS 4). From a topographical point of view, moraine M1 appears to be linked to the 60 m fluvioglacial terrace, dated in a tributary of the Aragón River. Moraine M2 was clearly linked to the fluvioglacial 20 m terrace. Other minor internal moraines were related to the 7-8 m terrace. The dates obtained for the last glacial cycle (20-18 ka) are similar to other chronologies for Mediterranean mountains, and confirm the occurrence of an early MIE in the Central Pyrenees that does not coincide with the global LGM

Source

Article of periodic

published at : Geografiska annaler. Series A. Physical geography / ISSN 0435-3676 / CODEN GAPGAP

Editor : Svenska sällskapet för antropologi och geografi, Stockholm - SUEDE (1965)

Millesime : 2013, vol. 95, no1 [pp. 15-32]

Bibliographic references : 3 p.

Collation : 9 fig., 1 tabl.

Language

Anglais

INIST-CNRS, Cote INIST : 2704 A

Digital Object Identifier

Go to electronic document thanks to its DOI : doi:10.1111/j.1468-0459.2012.00478.x

Tous droits réservés © Prodig - Bibliographie Géographique Internationale (BGI), 2013
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