Mots-clés
Canada Contrainte de cisaillement Déglaciation Erosion glaciaire Glaciaire LANDSAT Modèle Moraine Moraine latérale Northwest Territories Télédétection Canada Deglaciation Glacial erosion Glacial features LANDSAT Lateral moraine Model Moraine Northwest Territories Remote sensing Shear stressFormation mechanisms for ice-stream lateral shear margin moraines
Reconstructing ice-sheet dynamics from subglacial sediments and landforms. Special issue
Auteurs :HINDMARSH, R.C.A.
STOKES, C.R.
Ó COFAIGH, C.
Description :
The AA. review the characteristics of lateral shear margin moraines and present 2 quantitative models for their formation : 1) differential erosion rates related to lateral variations in the stream velocity and 2) lateral incursion from inter-stream ridges after the thinner stream retreats, where the shear margin moraine is consequently just a terminal moraine of the inter-stream ridge. The conditions that permit shear margin moraines to form are quite constrained. This is consistent with the infrequent observations of lateral shear margin moraines.
Type de document :
Article de monographie
Source :
Earth surface processes and landforms, issn : 0197-9337, 2008, vol. 33, n°. 4, p. 610-626, nombre de pages : 17, Collation : Illustration, Références bibliographiques : 48 ref.
Date :
2008
Editeur :
Pays édition : Royaume-Uni, Chichester, Wiley
Langue :
Anglais
Anglais
Droits :
Tous droits réservés © Prodig - Bibliographie Géographique Internationale (BGI)
Tous droits réservés © Prodig - Bibliographie Géographique Internationale (BGI)