Mots-clés
Antarctique Bathymétrie Drainage Drumlin Eau de fonte Erosion glaciaire Glaciaire Géomorphologie Héritage géomorphologique Marguerite Bay Sismique marine Zone froide Antarctica Bathymetry Cold area Drainage Drumlin Geomorphology Glacial erosion Glacial features Inherited features Marine seismic prospection MeltwaterGeomorphology of the onset area of a paleo-ice stream, Marguerite Bay, Antarctic Peninsula
Reconstructing ice-sheet dynamics from subglacial sediments and landforms. Special issue
Auteurs :ANDERSON, J.B.
OAKES FRETWELL, L.
Ó COFAIGH, C.
STOKES, C.
Description :
Geomorphic features indicate that both glacial and melt-water erosion characterize the onset area of the ancestral Marguerite Ice Stream. The large size of these features indicates that they formed over repeated glacial cycles, most recently during the Last Glacial Maximum. Ice drainage within the bay and on the inner continental shelf was strongly influenced by tectonic fabric. The glacially sculptured geomorphic features within Marguerite Bay co-exist with anastomosing, radial and relatively straight channels, which become increasingly focused in a seaward direction. This implies that a well organized subglacial drainage system existed within the bay at some point in the past.
Type de document :
Article de monographie
Source :
Earth surface processes and landforms, issn : 0197-9337, 2008, vol. 33, n°. 4, p. 503-512, nombre de pages : 10, Collation : Illustration, Références bibliographiques : 31 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)