Origin of well-rounded gravels in glacial deposits from Brøggerhalvøya, northwest Spitsbergen: potential problems caused by sediment reworking in the glacial environment
Well-rounded gravels are described from moraine-mound complexes, diamicton forefields and modern englacial thrusts at the margins of four glaciers on the northern side of Brøggerhalvøya, northwest Spitsbergen. Their shape charcteristics are compared with modern and fossil glacigenic, modern beach an...
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Language: | English |
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Norwegian Polar Institute
1998
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Online Access: | https://polarresearch.net/index.php/polar/article/view/2263 https://doi.org/10.3402/polar.v17i1.6607 |
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ftjpolarres:oai:journals.openacademia.net:article/2263 2023-05-15T18:02:40+02:00 Origin of well-rounded gravels in glacial deposits from Brøggerhalvøya, northwest Spitsbergen: potential problems caused by sediment reworking in the glacial environment Huddart, David Bennett, Matthew R. Hambrey, Michael J. Glasser, Neil F. Crawford, Kevin 1998-01-06 application/pdf https://polarresearch.net/index.php/polar/article/view/2263 https://doi.org/10.3402/polar.v17i1.6607 eng eng Norwegian Polar Institute https://polarresearch.net/index.php/polar/article/view/2263/5514 https://polarresearch.net/index.php/polar/article/view/2263 doi:10.3402/polar.v17i1.6607 Copyright (c) 2018 Polar Research Polar Research; Vol. 17 No. 1 (1998); 61-70 1751-8369 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion 1998 ftjpolarres https://doi.org/10.3402/polar.v17i1.6607 2021-11-11T19:12:21Z Well-rounded gravels are described from moraine-mound complexes, diamicton forefields and modern englacial thrusts at the margins of four glaciers on the northern side of Brøggerhalvøya, northwest Spitsbergen. Their shape charcteristics are compared with modern and fossil glacigenic, modern beach and Early Weichselian beach gravels from this peninsula. The best discriminators of the well-rounded gravels have been found to be the percentage-frequency roundness histograms, the roundness mid-point and roundness range diagrams and the sphericity-roundness plots. It is concluded that the gravels have been derived by englacial thrusting from Early Weichselian or last interglacial beaches in the inner parts of the fjord and in the low level cirques when sea level reached at least 50m a.s.l. and deposited the beach gravels. The discrimination between gravel in basal diamictons, proglacial outwash and modern beaches is difficult as the reworking has resulted in little particle shape change. The potential major problem caused by reworking in the glacial environment is emphasised, especially when clast shape comparisons from modern environments to older sediments are used. Article in Journal/Newspaper Polar Research Spitsbergen Polar Research (E-Journal) Brøggerhalvøya ENVELOPE(11.736,11.736,78.915,78.915) Polar Research 17 1 61 70 |
institution |
Open Polar |
collection |
Polar Research (E-Journal) |
op_collection_id |
ftjpolarres |
language |
English |
description |
Well-rounded gravels are described from moraine-mound complexes, diamicton forefields and modern englacial thrusts at the margins of four glaciers on the northern side of Brøggerhalvøya, northwest Spitsbergen. Their shape charcteristics are compared with modern and fossil glacigenic, modern beach and Early Weichselian beach gravels from this peninsula. The best discriminators of the well-rounded gravels have been found to be the percentage-frequency roundness histograms, the roundness mid-point and roundness range diagrams and the sphericity-roundness plots. It is concluded that the gravels have been derived by englacial thrusting from Early Weichselian or last interglacial beaches in the inner parts of the fjord and in the low level cirques when sea level reached at least 50m a.s.l. and deposited the beach gravels. The discrimination between gravel in basal diamictons, proglacial outwash and modern beaches is difficult as the reworking has resulted in little particle shape change. The potential major problem caused by reworking in the glacial environment is emphasised, especially when clast shape comparisons from modern environments to older sediments are used. |
format |
Article in Journal/Newspaper |
author |
Huddart, David Bennett, Matthew R. Hambrey, Michael J. Glasser, Neil F. Crawford, Kevin |
spellingShingle |
Huddart, David Bennett, Matthew R. Hambrey, Michael J. Glasser, Neil F. Crawford, Kevin Origin of well-rounded gravels in glacial deposits from Brøggerhalvøya, northwest Spitsbergen: potential problems caused by sediment reworking in the glacial environment |
author_facet |
Huddart, David Bennett, Matthew R. Hambrey, Michael J. Glasser, Neil F. Crawford, Kevin |
author_sort |
Huddart, David |
title |
Origin of well-rounded gravels in glacial deposits from Brøggerhalvøya, northwest Spitsbergen: potential problems caused by sediment reworking in the glacial environment |
title_short |
Origin of well-rounded gravels in glacial deposits from Brøggerhalvøya, northwest Spitsbergen: potential problems caused by sediment reworking in the glacial environment |
title_full |
Origin of well-rounded gravels in glacial deposits from Brøggerhalvøya, northwest Spitsbergen: potential problems caused by sediment reworking in the glacial environment |
title_fullStr |
Origin of well-rounded gravels in glacial deposits from Brøggerhalvøya, northwest Spitsbergen: potential problems caused by sediment reworking in the glacial environment |
title_full_unstemmed |
Origin of well-rounded gravels in glacial deposits from Brøggerhalvøya, northwest Spitsbergen: potential problems caused by sediment reworking in the glacial environment |
title_sort |
origin of well-rounded gravels in glacial deposits from brøggerhalvøya, northwest spitsbergen: potential problems caused by sediment reworking in the glacial environment |
publisher |
Norwegian Polar Institute |
publishDate |
1998 |
url |
https://polarresearch.net/index.php/polar/article/view/2263 https://doi.org/10.3402/polar.v17i1.6607 |
long_lat |
ENVELOPE(11.736,11.736,78.915,78.915) |
geographic |
Brøggerhalvøya |
geographic_facet |
Brøggerhalvøya |
genre |
Polar Research Spitsbergen |
genre_facet |
Polar Research Spitsbergen |
op_source |
Polar Research; Vol. 17 No. 1 (1998); 61-70 1751-8369 |
op_relation |
https://polarresearch.net/index.php/polar/article/view/2263/5514 https://polarresearch.net/index.php/polar/article/view/2263 doi:10.3402/polar.v17i1.6607 |
op_rights |
Copyright (c) 2018 Polar Research |
op_doi |
https://doi.org/10.3402/polar.v17i1.6607 |
container_title |
Polar Research |
container_volume |
17 |
container_issue |
1 |
container_start_page |
61 |
op_container_end_page |
70 |
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1766173099500240896 |