Mots-clés
Avalanche Bloc erratique Datation Distribution spatiale Dépôt de pente Islande Lichénométrie Neige Avalanche Dating Erratic boulder Iceland Lichenometry Slope deposit Snow Spatial distribution Avalancha Bloque errático Datación Depósíto de pendiente Distribución espacial Liquenometria NieveDistribution and frequency of snow-avalanche debris transfer in the distal part of colluvial cones in Central North Iceland
Special issue. Sedimentary fluxes and budgets in changing cold environments : quantitative analysis and scaling issues
Auteur(s) et Affiliation(s)
DECAULNE, A.
GEOLAB, Univ. Blaise Pascal, Clermont-Ferrand, France
GEOLAB, UMR 6042 CNRS, Clermont-Ferrand, France
SÆMUNDSSON, Þ.
Natural Research Centre of North-western Iceland, Sauởárkrókur, Islande
BEYLICH, A.A.
Geological survey of Norway (NGU), Quaternary Geology and Climate Group, NO-7491, Trondheim, Norvege
Dep. of Geography, Norwegian Univ. of Science and Technology (NTNU), Trondheim, Norvege
LAMOUREUX, S.F.
Dep. of Geography, Queen's Univ., Ontario, Kingston, Canada
Description :
This paper emphasizes the importance of studying diffuse rock debris accumulation in the far distal part of colluvial cones with the aim of defining the spatial distribution and frequency of extreme snow avalanches. The field based methods used in this study confirm the snow avalanche origin of these deposits. A relative age of the deposits is obtained by assessing the vegetation cover of the boulder surfaces and by measuring the rock hardness using a Schmidt hammer. The AA. conclude that there were frequent extreme snow avalanches which have occurred since the Little Ice Age, and that they have decreased in magnitude during the past decade.
Type de document :
Article de monographie
Source :
Geografiska annaler. Series A. Physical geography, issn : 0435-3676, 2010, vol. 92, n°. 2, p. 177-187, nombre de pages : 11, Références bibliographiques : 32 ref.
Date :
2010
Editeur :
Pays édition : Suede, Stockholm, Svenska sällskapet för antropologi och geografi
Langue :
Anglais
Anglais
Droits :
Tous droits réservés © Prodig - Bibliographie Géographique Internationale (BGI)
Tous droits réservés © Prodig - Bibliographie Géographique Internationale (BGI)