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(Article of periodic en Anglais - 2010)

Document title

Some observations on the formation of an active pronival rampart at Grunehogna Peaks, Western Dronning Maud Land, Antarctica

Authors(s) and Affiliation(s)

HEDDING D.W. (1) ; MEIKLEJOHN K.I. (2) ; LE ROUX J.J. (3) ; LOUBSER M. (2) ; DAVIS J.K. (2) ;
(1) Dep. of Geography, Univ., Florida, AFRIQUE DU SUD
(2) Dep. of Geography, Geoinformatics and Meteorology, Univ., Pretoria, AFRIQUE DU SUD
(3) Agriculture Research Council - Inst. for Soil, Climate and Water, Pretoria, AFRIQUE DU SUD

Abstract

Summer observations of the morphology and the debris accumulation processes at an actively forming pronival rampart at Grunehogna Peaks, Western Dronning Maud Land, demonstrate that rockfall debris accumulation is causing downslope (outward) rampart extension even though the distal slope is not at the angle of repose. Field experiments show that the vast majority of rocks can traverse a stable firn surface to reach the proximal slope of the rampart and more than half end up on the distal slope or beyond. The formation processes indicate that the morphological characteristics and environmental conditions under which such features develop may be more varied than conceived in current models. Consequently, caution must be employed when fossil ramparts are used to infer palaeo-environmental conditions

Source

Article of periodic

published at : Permafrost and periglacial processes / ISSN 1045-6740 / CODEN PEPPED

Editor : Wiley, Chichester - ROYAUME-UNI (1990)

Millesime : 2010, vol. 21, no4 [pp. 355-361]

Bibliographic references : 26 ref.

Collation : 3 fig., 3 tabl.

Language

Anglais

Digital Object Identifier

Go to electronic document thanks to its DOI : doi:10.1002/ppp.698

Tous droits réservés © Prodig - Bibliographie Géographique Internationale (BGI), 2011
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