On the Origin and Transport of Englacial Debris in Svalbard Glaciers
Very considerable amounts of englacial debris derived from the glacier bed are contained in the polar glaciers of Svalbard. It is suggested that this debris is largely incorporated by basal freezing on the down-glacier flanks of bedrock obstructions, although other freezing mechanisms and thrusting...
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Language: | English |
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Cambridge University Press (CUP)
1970
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Online Access: | http://dx.doi.org/10.1017/s0022143000023534 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022143000023534 |
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crcambridgeupr:10.1017/s0022143000023534 2024-05-19T07:40:48+00:00 On the Origin and Transport of Englacial Debris in Svalbard Glaciers Boulton, G. S. 1970 http://dx.doi.org/10.1017/s0022143000023534 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022143000023534 en eng Cambridge University Press (CUP) Journal of Glaciology volume 9, issue 56, page 213-229 ISSN 0022-1430 1727-5652 journal-article 1970 crcambridgeupr https://doi.org/10.1017/s0022143000023534 2024-05-02T06:51:17Z Very considerable amounts of englacial debris derived from the glacier bed are contained in the polar glaciers of Svalbard. It is suggested that this debris is largely incorporated by basal freezing on the down-glacier flanks of bedrock obstructions, although other freezing mechanisms and thrusting may be important. The basal freezing hypothesis predicts that vertical and lateral variations in englacial debris content should reflect the variation in subglacial rocks over which the glacier passes; this prediction is tested against an actual englacial debris sequence. The mode of transport of debris, including its stone orientation fabrics, is described, and also the way in which it reacts in zones of intense compression. A generalization is suggested: that polar glaciers tend to contain much larger amounts of basally derived debris than temperate glaciers. This supports the view that the englacial incorporation of debris is controlled by the temperature regime of the glacier, and could be of considerable importance in the interpretation of the regimes of ancient glaciers from their deposits. Article in Journal/Newspaper glacier Journal of Glaciology Svalbard Cambridge University Press Journal of Glaciology 9 56 213 229 |
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Open Polar |
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Cambridge University Press |
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crcambridgeupr |
language |
English |
description |
Very considerable amounts of englacial debris derived from the glacier bed are contained in the polar glaciers of Svalbard. It is suggested that this debris is largely incorporated by basal freezing on the down-glacier flanks of bedrock obstructions, although other freezing mechanisms and thrusting may be important. The basal freezing hypothesis predicts that vertical and lateral variations in englacial debris content should reflect the variation in subglacial rocks over which the glacier passes; this prediction is tested against an actual englacial debris sequence. The mode of transport of debris, including its stone orientation fabrics, is described, and also the way in which it reacts in zones of intense compression. A generalization is suggested: that polar glaciers tend to contain much larger amounts of basally derived debris than temperate glaciers. This supports the view that the englacial incorporation of debris is controlled by the temperature regime of the glacier, and could be of considerable importance in the interpretation of the regimes of ancient glaciers from their deposits. |
format |
Article in Journal/Newspaper |
author |
Boulton, G. S. |
spellingShingle |
Boulton, G. S. On the Origin and Transport of Englacial Debris in Svalbard Glaciers |
author_facet |
Boulton, G. S. |
author_sort |
Boulton, G. S. |
title |
On the Origin and Transport of Englacial Debris in Svalbard Glaciers |
title_short |
On the Origin and Transport of Englacial Debris in Svalbard Glaciers |
title_full |
On the Origin and Transport of Englacial Debris in Svalbard Glaciers |
title_fullStr |
On the Origin and Transport of Englacial Debris in Svalbard Glaciers |
title_full_unstemmed |
On the Origin and Transport of Englacial Debris in Svalbard Glaciers |
title_sort |
on the origin and transport of englacial debris in svalbard glaciers |
publisher |
Cambridge University Press (CUP) |
publishDate |
1970 |
url |
http://dx.doi.org/10.1017/s0022143000023534 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022143000023534 |
genre |
glacier Journal of Glaciology Svalbard |
genre_facet |
glacier Journal of Glaciology Svalbard |
op_source |
Journal of Glaciology volume 9, issue 56, page 213-229 ISSN 0022-1430 1727-5652 |
op_doi |
https://doi.org/10.1017/s0022143000023534 |
container_title |
Journal of Glaciology |
container_volume |
9 |
container_issue |
56 |
container_start_page |
213 |
op_container_end_page |
229 |
_version_ |
1799480380157329408 |