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Formation 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
Droits :
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