Glacial sediment provenance, dispersal and deposition, Vestfold Hills, East Antarctica
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 morp...
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Cambridge University Press (CUP)
2003
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Online Access: | http://dx.doi.org/10.1017/s0954102003001263 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0954102003001263 |
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crcambridgeupr:10.1017/s0954102003001263 2024-09-15T17:48:40+00:00 Glacial sediment provenance, dispersal and deposition, Vestfold Hills, East Antarctica GORE, DAMIAN B. SNAPE, I. LEISHMAN, M.R. 2003 http://dx.doi.org/10.1017/s0954102003001263 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0954102003001263 en eng Cambridge University Press (CUP) https://www.cambridge.org/core/terms Antarctic Science volume 15, issue 2, page 259-269 ISSN 0954-1020 1365-2079 journal-article 2003 crcambridgeupr https://doi.org/10.1017/s0954102003001263 2024-07-31T04:04:38Z 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. Article in Journal/Newspaper Antarc* Antarctic Science Antarctica East Antarctica Cambridge University Press Antarctic Science 15 2 259 269 |
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Open Polar |
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Cambridge University Press |
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crcambridgeupr |
language |
English |
description |
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. |
format |
Article in Journal/Newspaper |
author |
GORE, DAMIAN B. SNAPE, I. LEISHMAN, M.R. |
spellingShingle |
GORE, DAMIAN B. SNAPE, I. LEISHMAN, M.R. Glacial sediment provenance, dispersal and deposition, Vestfold Hills, East Antarctica |
author_facet |
GORE, DAMIAN B. SNAPE, I. LEISHMAN, M.R. |
author_sort |
GORE, DAMIAN B. |
title |
Glacial sediment provenance, dispersal and deposition, Vestfold Hills, East Antarctica |
title_short |
Glacial sediment provenance, dispersal and deposition, Vestfold Hills, East Antarctica |
title_full |
Glacial sediment provenance, dispersal and deposition, Vestfold Hills, East Antarctica |
title_fullStr |
Glacial sediment provenance, dispersal and deposition, Vestfold Hills, East Antarctica |
title_full_unstemmed |
Glacial sediment provenance, dispersal and deposition, Vestfold Hills, East Antarctica |
title_sort |
glacial sediment provenance, dispersal and deposition, vestfold hills, east antarctica |
publisher |
Cambridge University Press (CUP) |
publishDate |
2003 |
url |
http://dx.doi.org/10.1017/s0954102003001263 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0954102003001263 |
genre |
Antarc* Antarctic Science Antarctica East Antarctica |
genre_facet |
Antarc* Antarctic Science Antarctica East Antarctica |
op_source |
Antarctic Science volume 15, issue 2, page 259-269 ISSN 0954-1020 1365-2079 |
op_rights |
https://www.cambridge.org/core/terms |
op_doi |
https://doi.org/10.1017/s0954102003001263 |
container_title |
Antarctic Science |
container_volume |
15 |
container_issue |
2 |
container_start_page |
259 |
op_container_end_page |
269 |
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1810290139178467328 |