Glacial sediment provenance, dispersal and deposition, Vestfold Hills, East Antarctica

Damian B. Gore*, I. Snape, M. R. Leishman

*Corresponding author for this work

Research output: Contribution to journalArticle

7 Citations (Scopus)
68 Downloads (Pure)

Abstract

Field observations involving landform evaluation and the physical characterization of sediments, combined with a detailed analysis of the spatial distribution of bedrock and sediment geochemical patterns, suggests a limit to the glacial transport half-distance of c. 3 km in Vestfold Hills. Four morphologically distinct glacial deposits were sampled (small debris ridges, large debris ridges, debris drapes and valley fills) on the basis of field geometry. These landforms were subsequently distinguished by grain size, mineralogy and geochemistry. Since there are no nunataks south of Vestfold Hills, all debris is derived subglacially and sedimentological differences are attributed to the physical weathering of preglacial surfaces in Vestfold Hills and fluvial winnowing during deposition. Given that thrust geometries may occur in large debris ridges, glacial transport distances were short, and fluvial sorting of sediments was an important mechanism, reconstructions of glacial histories based on the stratigraphy of deposits in Vestfold Hills should be made with caution.

Original languageEnglish
Pages (from-to)259-269
Number of pages11
JournalAntarctic Science
Volume15
Issue number2
DOIs
Publication statusPublished - Jun 2003

Bibliographical note

Copyright 2003 Cambridge University Press. Reprinted from Antartic science.

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