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Glissements de terrain et évolution des versants [L'exemple de la bordure Nord-Est du Détroit de Messine (Italie)]

Authors
Journal
Méditerranée
0025-8296
Publisher
PERSEE Program
Publication Date
Volume
52
Issue
3
Identifiers
DOI: 10.3406/medit.1984.2253
Disciplines
  • Earth Science
  • Geography

Abstract

The frequency of rotational and deep landslides on valley sides, entirely shaped in coherent rocks (granite, gneiss, calcarenite) reputed unfavourable to these mass movements when they are not weathered, is explained not only by the state of fracturation of these rocks but also by the geomorphological context and the geomorphological evolution : a moist mediterranean climate, an association of high valley sides and flat surfaces, the regularization of these hillslopes and the steepening of the slope base through the recent vertical erosion of the hydrographie network. These landslides are the starting-point of a sequence of processes - a strongly marked slide, the evolution of the starting scar through mass falling, block falling and the formation of scree, the drawing off of the sliding mass by running water - which leads to the softering of the landforms due to the deep landslides and to the regularizing again of the valley side.

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