The Development of a Complex Supraglacial Moraine at the Margin of Sørbreen, Ny Friesland, Vestspitsbergen
A series of concentric debris bands crop out on the frontal stagnant zone of Sørbreen, Ny Friesland, Vestspitsbergen. The contained debris, which is dominantly sand and silt with some clay and gravel, is well sorted and banded, and it is thought to be derived from subglacial fluvial deposits. These...
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Language: | English |
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Cambridge University Press (CUP)
1967
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Online Access: | http://dx.doi.org/10.1017/s0022143000019961 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022143000019961 |
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crcambridgeupr:10.1017/s0022143000019961 2024-04-07T07:53:42+00:00 The Development of a Complex Supraglacial Moraine at the Margin of Sørbreen, Ny Friesland, Vestspitsbergen Boulton, G. S. 1967 http://dx.doi.org/10.1017/s0022143000019961 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022143000019961 en eng Cambridge University Press (CUP) Journal of Glaciology volume 6, issue 47, page 717-735 ISSN 0022-1430 1727-5652 Earth-Surface Processes journal-article 1967 crcambridgeupr https://doi.org/10.1017/s0022143000019961 2024-03-08T00:37:01Z A series of concentric debris bands crop out on the frontal stagnant zone of Sørbreen, Ny Friesland, Vestspitsbergen. The contained debris, which is dominantly sand and silt with some clay and gravel, is well sorted and banded, and it is thought to be derived from subglacial fluvial deposits. These debris bands give rise to a complex series of bedded moraine ridges, and bedded and unbedded sediment sheets on the glacier surface. The development of a supraglacial hummocky moraine is traced and it is composed of several elements: supraglacial ridges, kettle-holes, and flowed sediment sheets, which are derived from debris bands; supra-glacial fluvial deposits and clay-silt ablation tills; and englacial fluvial deposits. It is also suggested that large areas of the outwash plain are underlain by dead glacier ice. From the present work there are several possible implications for the interpretation of Pleistocene deposits: i. Certain types of “controlled disintegration features” may have formed supraglacially from debris bands. Some bedded features hitherto interpreted as Huvioglacial in origin may be supraglacial moraines. ii. Certain types of “kame-and-kettle“moraine may be mainly supraglacial in origin. iii. Complex sequences of tills and bedded sediments may have been formed during a single glacier retreat phase rather than by multiple advance and retreat. Article in Journal/Newspaper Journal of Glaciology Ny Friesland Cambridge University Press Ny Friesland ENVELOPE(16.847,16.847,79.498,79.498) Dead Glacier ENVELOPE(-58.461,-58.461,-62.221,-62.221) Journal of Glaciology 6 47 717 735 |
institution |
Open Polar |
collection |
Cambridge University Press |
op_collection_id |
crcambridgeupr |
language |
English |
topic |
Earth-Surface Processes |
spellingShingle |
Earth-Surface Processes Boulton, G. S. The Development of a Complex Supraglacial Moraine at the Margin of Sørbreen, Ny Friesland, Vestspitsbergen |
topic_facet |
Earth-Surface Processes |
description |
A series of concentric debris bands crop out on the frontal stagnant zone of Sørbreen, Ny Friesland, Vestspitsbergen. The contained debris, which is dominantly sand and silt with some clay and gravel, is well sorted and banded, and it is thought to be derived from subglacial fluvial deposits. These debris bands give rise to a complex series of bedded moraine ridges, and bedded and unbedded sediment sheets on the glacier surface. The development of a supraglacial hummocky moraine is traced and it is composed of several elements: supraglacial ridges, kettle-holes, and flowed sediment sheets, which are derived from debris bands; supra-glacial fluvial deposits and clay-silt ablation tills; and englacial fluvial deposits. It is also suggested that large areas of the outwash plain are underlain by dead glacier ice. From the present work there are several possible implications for the interpretation of Pleistocene deposits: i. Certain types of “controlled disintegration features” may have formed supraglacially from debris bands. Some bedded features hitherto interpreted as Huvioglacial in origin may be supraglacial moraines. ii. Certain types of “kame-and-kettle“moraine may be mainly supraglacial in origin. iii. Complex sequences of tills and bedded sediments may have been formed during a single glacier retreat phase rather than by multiple advance and retreat. |
format |
Article in Journal/Newspaper |
author |
Boulton, G. S. |
author_facet |
Boulton, G. S. |
author_sort |
Boulton, G. S. |
title |
The Development of a Complex Supraglacial Moraine at the Margin of Sørbreen, Ny Friesland, Vestspitsbergen |
title_short |
The Development of a Complex Supraglacial Moraine at the Margin of Sørbreen, Ny Friesland, Vestspitsbergen |
title_full |
The Development of a Complex Supraglacial Moraine at the Margin of Sørbreen, Ny Friesland, Vestspitsbergen |
title_fullStr |
The Development of a Complex Supraglacial Moraine at the Margin of Sørbreen, Ny Friesland, Vestspitsbergen |
title_full_unstemmed |
The Development of a Complex Supraglacial Moraine at the Margin of Sørbreen, Ny Friesland, Vestspitsbergen |
title_sort |
development of a complex supraglacial moraine at the margin of sørbreen, ny friesland, vestspitsbergen |
publisher |
Cambridge University Press (CUP) |
publishDate |
1967 |
url |
http://dx.doi.org/10.1017/s0022143000019961 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022143000019961 |
long_lat |
ENVELOPE(16.847,16.847,79.498,79.498) ENVELOPE(-58.461,-58.461,-62.221,-62.221) |
geographic |
Ny Friesland Dead Glacier |
geographic_facet |
Ny Friesland Dead Glacier |
genre |
Journal of Glaciology Ny Friesland |
genre_facet |
Journal of Glaciology Ny Friesland |
op_source |
Journal of Glaciology volume 6, issue 47, page 717-735 ISSN 0022-1430 1727-5652 |
op_doi |
https://doi.org/10.1017/s0022143000019961 |
container_title |
Journal of Glaciology |
container_volume |
6 |
container_issue |
47 |
container_start_page |
717 |
op_container_end_page |
735 |
_version_ |
1795669795981492224 |