Geomorphological characteristics of small debris flows on Junior's Kop, Marion Island, maritime sub-Antarctic

Auteurs :
BOELHOUWERS, J.
HOLNESS, S.
SUMNER, P.

Description :
The geomorphological characteristics of small debris flows in a maritime sub-Antarctic environment are described. The morphological and sedimentological characteristics of the debris flows are comparable to debris flows documented for other parts of the world; their initiation appears closely linked to the unusual environment in which they are found. The debris flows are triggered by sediment mobilization upon saturation of the frost-heaved surface gravel and overland flow over the low-permeability and frost-susceptible slope materials. Morphological effects of the flows are short-lived due to obliteration by subsequent frost heave activity.


Type de document :
Article de périodique

Source :
Earth surface processes and landforms, issn : 0197-9337, 2000, vol. 25, n°. 4, p. 341-352, Collation : Illustration, Références bibliographiques : 14 ref.

Date :
2000

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