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(Article of periodic en Anglais - 2013)

Document title

Chronology and paleoenvironmental interpretation of talus flatiron sequences in a sub-humid mountainous area : Tremp Depression, Spanish Pyrenees

Authors(s) and Affiliation(s)

ROQUÉ C. (1) ; LINARES R. (2) ; ZARROCA M. (2) ; ROSELL J. ; PELLICER X.M. (3) ; GUTIÉRREZ F. (4) ;
(1) Àrea de Geodinàmica Externa i Geomorfologia, Univ., Girona, ESPAGNE
(2) External Geodynamics and Hydrogeology Group, Dept. of Geology, Geological Cabinet of Territorial and Environmental Analysis (GATA), Autonomous Univ., Barcelona, ESPAGNE
(3) Geological Survey of Ireland, Dublin, IRLANDE
(4) Dept. de Ciencias de la Tierra, Universidad de Zaragoza, Zaragoza, ESPAGNE

Abstract

Talus flatirons are debris-covered relict slopes, disconnected from the source area, which are relatively common in arid and semi-arid areas. Talus flatiron sequences developed in the Tremp Depression, eastern Spanish Pyrenees, are analysed from the geomorphological, chronological and paleoenvironmental perspective. The 2 groups of relict slopes differentiated by means of detailed geomorphological mapping have been dated by optically stimulated luminescence (OSL) and radiocarbon dating. The comparison of the ages obtained in the Tremp Depression with chronologies published for talus flatiron sequences in semi-arid areas and other paleoclimatic proxies suggests that the aggradation phases in the slopes occurred during periods with higher humidity and vegetation cover. The chronological differences observed between semi-arid Spain and the Tremp Depression may be partly related to the more humid climate of the latter mountain area

Source

Article of periodic

published at : Earth surface processes and landforms / ISSN 0197-9337 / CODEN ESPLDB

Editor : Wiley, Chichester - ROYAUME-UNI (1981)

Millesime : 2013, vol. 38, no13 [pp. 1513-1522]

Bibliographic references : 1 p.

Collation : 6 fig., 1 tabl.

Language

Anglais

INIST-CNRS, Cote INIST : 17355

Digital Object Identifier

Go to electronic document thanks to its DOI : doi:10.1002/esp.3391

Tous droits réservés © Prodig - Bibliographie Géographique Internationale (BGI), 2014
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