Palaeo-ice-stream onsets : examples from the north-eastern Laurentide Ice Sheet

Reconstructing ice-sheet dynamics from subglacial sediments and landforms. Special issue

Auteurs :
DE ANGELIS, H.
KLEMAN, J.
Ó COFAIGH, C.

Description :
The AA. report on observations of glacial landscapes at the head of geomorphologically interpreted palaeo-ice streams, i.e. palaeo-ice-stream onsets. Their work is based on the results of systematic palaeoglaciological mapping of the portion of north-eastern Canada formerly covered by the Laurentide Ice Sheet. Four different cases are considered and analysed in a geographical information system (GIS) environment with full integration of ancillary topographical and geological data. The AA. conclude that conditions for the preservation of the onset zones are more likely to be met in the case of relatively small ice streams because these are more rapidly deglaciated.


Type de document :
Article de monographie

Source :
Earth surface processes and landforms, issn : 0197-9337, 2008, vol. 33, n°. 4, p. 560-572, nombre de pages : 13, Collation : Illustration, Références bibliographiques : 62 ref.

Date :
2008

Editeur :
Pays édition : Royaume-Uni, Chichester, Wiley