Ice Segregation as an Origin for Lenses of Non-Glacial Ice in “Ice-Cemented” Rock Glaciers
Abstract In order to flow with the gradients observed (10° to 15°) rock glaciers cannot be simply ice-cemented rock debris, but probably contain masses or lenses of debris-free ice. The nature and origin of the ice in rock glaciers that are in no way connected to ice glaciers has not been adequately...
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Language: | English |
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Cambridge University Press (CUP)
1981
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Online Access: | http://dx.doi.org/10.1017/s0022143000011564 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022143000011564 |
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crcambridgeupr:10.1017/s0022143000011564 2024-03-03T08:45:17+00:00 Ice Segregation as an Origin for Lenses of Non-Glacial Ice in “Ice-Cemented” Rock Glaciers Wayne, William J. 1981 http://dx.doi.org/10.1017/s0022143000011564 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022143000011564 en eng Cambridge University Press (CUP) Journal of Glaciology volume 27, issue 97, page 506-510 ISSN 0022-1430 1727-5652 Earth-Surface Processes journal-article 1981 crcambridgeupr https://doi.org/10.1017/s0022143000011564 2024-02-08T08:37:11Z Abstract In order to flow with the gradients observed (10° to 15°) rock glaciers cannot be simply ice-cemented rock debris, but probably contain masses or lenses of debris-free ice. The nature and origin of the ice in rock glaciers that are in no way connected to ice glaciers has not been adequately explained. Rock glaciers and talus above them are permeable. Water from snow-melt and rain flows through the lower part of the debris on top of the bedrock floor. In the headward part of a rock glacier, where the total thickness is not great, if this groundwater flow is able to maintain water pressure against the base of an aggrading permafrost, segregation of ice lenses should take place. Ice segregation on a large scale would produce lenses of clear ice of sufficient size to permit the streams or lobes of rock debris to flow with gradients comparable to those of glaciers. It would also account for the substantial loss in volume that takes place when a rock glacier stabilizes and collapses. Article in Journal/Newspaper Ice Journal of Glaciology permafrost Cambridge University Press Journal of Glaciology 27 97 506 510 |
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Open Polar |
collection |
Cambridge University Press |
op_collection_id |
crcambridgeupr |
language |
English |
topic |
Earth-Surface Processes |
spellingShingle |
Earth-Surface Processes Wayne, William J. Ice Segregation as an Origin for Lenses of Non-Glacial Ice in “Ice-Cemented” Rock Glaciers |
topic_facet |
Earth-Surface Processes |
description |
Abstract In order to flow with the gradients observed (10° to 15°) rock glaciers cannot be simply ice-cemented rock debris, but probably contain masses or lenses of debris-free ice. The nature and origin of the ice in rock glaciers that are in no way connected to ice glaciers has not been adequately explained. Rock glaciers and talus above them are permeable. Water from snow-melt and rain flows through the lower part of the debris on top of the bedrock floor. In the headward part of a rock glacier, where the total thickness is not great, if this groundwater flow is able to maintain water pressure against the base of an aggrading permafrost, segregation of ice lenses should take place. Ice segregation on a large scale would produce lenses of clear ice of sufficient size to permit the streams or lobes of rock debris to flow with gradients comparable to those of glaciers. It would also account for the substantial loss in volume that takes place when a rock glacier stabilizes and collapses. |
format |
Article in Journal/Newspaper |
author |
Wayne, William J. |
author_facet |
Wayne, William J. |
author_sort |
Wayne, William J. |
title |
Ice Segregation as an Origin for Lenses of Non-Glacial Ice in “Ice-Cemented” Rock Glaciers |
title_short |
Ice Segregation as an Origin for Lenses of Non-Glacial Ice in “Ice-Cemented” Rock Glaciers |
title_full |
Ice Segregation as an Origin for Lenses of Non-Glacial Ice in “Ice-Cemented” Rock Glaciers |
title_fullStr |
Ice Segregation as an Origin for Lenses of Non-Glacial Ice in “Ice-Cemented” Rock Glaciers |
title_full_unstemmed |
Ice Segregation as an Origin for Lenses of Non-Glacial Ice in “Ice-Cemented” Rock Glaciers |
title_sort |
ice segregation as an origin for lenses of non-glacial ice in “ice-cemented” rock glaciers |
publisher |
Cambridge University Press (CUP) |
publishDate |
1981 |
url |
http://dx.doi.org/10.1017/s0022143000011564 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022143000011564 |
genre |
Ice Journal of Glaciology permafrost |
genre_facet |
Ice Journal of Glaciology permafrost |
op_source |
Journal of Glaciology volume 27, issue 97, page 506-510 ISSN 0022-1430 1727-5652 |
op_doi |
https://doi.org/10.1017/s0022143000011564 |
container_title |
Journal of Glaciology |
container_volume |
27 |
container_issue |
97 |
container_start_page |
506 |
op_container_end_page |
510 |
_version_ |
1792500810425303040 |