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- Title
Geomorphological characteristics of small debris flows on Junior's Kop, Marion Island, maritime subantarctic
- Authors
Sumner, Paul; Boelhouwers, Jan; Holness, Steve
- Abstract
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 todebris flows documented for other parts of the world; their initiation appears closely linked to the unusual environment in which they are found. Sediment supply is generated by diurnal frost heave of loamysediment associated with Azorella selago. 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.
- Subjects
FRAZIL ice; GEOMORPHOLOGY; HYDROLOGY; SEDIMENTOLOGY; SOIL science; PARTICLE size distribution
- Publication
Earth Surface Processes & Landforms, 2000, Vol 25, Issue 4, p341
- ISSN
0197-9337
- Publication type
Article