Large rockslides in the Southern Central Andes of Chile (32-34.5°S) : tectonic control and significance for Quaternary landscape evolution

Auteur(s) et Affiliation(s)



Description :
Most of the rockslides appear in the western Cordillera Principal and cluster along major geological structures. Variographic analyses show spatial correlation between rockslides, geological structures and shallow seismicity. A relative chronosequence was calibrated with existing 14C and 40Ar/39Ar dates and new cosmogenic nuclide exposure ages for selected rockslides. Rockslide-induced sediment yield was estimated with empirical relations for rockslide area distributions. The estimates of sediment transfer and the spatial distribution of rockslides reflect a landscape in which tectonic and geological controls on denudation are more significant than climate.


Type de document :
Article de périodique

Source :
Geomorphology (Amsterdam), issn : 0169-555X, 2009, vol. 104, n°. 3-4, p. 117-133, nombre de pages : 17, Références bibliographiques : 2 p.

Date :
2009

Editeur :
Pays édition : Pays-Bas, Amsterdam, Elsevier