Superimposition of ribbed moraines on a palaeo-ice-stream bed : implications for ice stream dynamics and shutdown

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

Auteurs :
STOKES, C.R.
LIAN, O.B.
TULACZYK, S.
CLARK, C.D.
Ó COFAIGH, C.

Description :
In this paper, detailed observations of an intriguing subglacial landform assemblage of ribbed moraines superimposed on glacial lineations on the Dubawnt Lake Ice Stream bed (north-west Canadian Shield) are presented, including their morphometry, internal structure (from ground penetrating radar (GPR) surveys and from glaciogeological analysis) and sedimentological characteristics (from sediment architecture and lithofacies analysis). The observations suggest an abrupt change in ice dynamics that correlates with 2 phases of glacial landform development.


Type de document :
Article de monographie

Source :
Earth surface processes and landforms, issn : 0197-9337, 2008, vol. 33, n°. 4, p. 593-609, nombre de pages : 17, Collation : Illustration, Références bibliographiques : 55 ref.

Date :
2008

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