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Comptes Rendus Géoscience
Volume 337, n° 16
pages 1431-1438 (décembre 2005)
Doi : 10.1016/j.crte.2005.09.010
Received : 12 October 2004 ;  accepted : 30 September 2005
Lʼérosion des chaînes de montagnes : influence de la sédimentation de piedmont
Erosion of mountain belts: influence of piedmont sedimentation
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Auteur correspondant.
Résumé

La pénéplanation des chaînes de montagnes est généralement considérée comme résultant de lʼaction de lʼérosion à long terme, qui lisse le relief et diminue leur altitude jusquʼà tendre vers le niveau marin. Nous proposons un nouveau modèle, dans lequel la sédimentation de piedmont traduit une montée du niveau de base de la chaîne, entraînant son aplanissement en altitude. Ce modèle est illustré à travers lʼévolution morphologique du versant sud des Pyrénées durant le Cénozoïque. Pour citer cet article : J. Babault, J. Van Den Driessche, C. R. Geoscience 337 (2005).

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Abstract

The applanation of mountain belts that results in peneplain is generally considered to be caused by the long-term activity of erosion. Peneplanation has been previously defined as the lowering of an elevated topography and the concomitant subduing of its relief. We propose a model following which piedmont sedimentation induces the base level rise, allowing applanation to develop at high elevation and resulting in an elevated peneplain'. This model is illustrated by the morphological evolution of the southern flank of the Pyrenees during the Cainozoic. To cite this article: J. Babault, J. Van Den Driessche, C. R. Geoscience 337 (2005).

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Grey Grey Cool Nike Black Wolf Mots-clés : Pénéplaine, Aplanissement, Surface dʼérosion, Érosion, Sédimentation, Piedmont, Pyrénées

Keywords : Peneplain, Applanation, Erosional surfaces, Erosion, Sedimentation, Piedmont, Pyrenees


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