The Internal Structure and Ice Crystallography of Seasonal Frost Mounds
Abstract The crystal character of the ice core within frost blisters supports the hypothesis that groundwater injection into residual zones of the active layer followed by rapid freezing is the primary growth mechanism for these features. The ice core is characterized by an upper zone of relatively...
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Language: | English |
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Cambridge University Press (CUP)
1985
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Online Access: | http://dx.doi.org/10.1017/s0022143000006407 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022143000006407 |
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crcambridgeupr:10.1017/s0022143000006407 2023-06-11T04:12:40+02:00 The Internal Structure and Ice Crystallography of Seasonal Frost Mounds Pollard, W. H. French, H. M. 1985 http://dx.doi.org/10.1017/s0022143000006407 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022143000006407 en eng Cambridge University Press (CUP) Journal of Glaciology volume 31, issue 108, page 157-162 ISSN 0022-1430 1727-5652 Earth-Surface Processes journal-article 1985 crcambridgeupr https://doi.org/10.1017/s0022143000006407 2023-05-01T18:19:28Z Abstract The crystal character of the ice core within frost blisters supports the hypothesis that groundwater injection into residual zones of the active layer followed by rapid freezing is the primary growth mechanism for these features. The ice core is characterized by an upper zone of relatively small randomly arranged equigranular ice crystals which change with increasing depth to columnar anhedral crystals, commonly exceeding 200 mm in length, and with crystal diameters ranging between 25 and 35 mm. Petrofabric analyses show that the c -axis orientations are normal to crystal elongations, with crystal growth along the basal plane in an a -axis direction. These observations eliminate ice segregation as a possible growth mechanism, thereby distinguishing seasonal frost mounds from palsas. Article in Journal/Newspaper ice core Journal of Glaciology palsas Cambridge University Press (via Crossref) Journal of Glaciology 31 108 157 162 |
institution |
Open Polar |
collection |
Cambridge University Press (via Crossref) |
op_collection_id |
crcambridgeupr |
language |
English |
topic |
Earth-Surface Processes |
spellingShingle |
Earth-Surface Processes Pollard, W. H. French, H. M. The Internal Structure and Ice Crystallography of Seasonal Frost Mounds |
topic_facet |
Earth-Surface Processes |
description |
Abstract The crystal character of the ice core within frost blisters supports the hypothesis that groundwater injection into residual zones of the active layer followed by rapid freezing is the primary growth mechanism for these features. The ice core is characterized by an upper zone of relatively small randomly arranged equigranular ice crystals which change with increasing depth to columnar anhedral crystals, commonly exceeding 200 mm in length, and with crystal diameters ranging between 25 and 35 mm. Petrofabric analyses show that the c -axis orientations are normal to crystal elongations, with crystal growth along the basal plane in an a -axis direction. These observations eliminate ice segregation as a possible growth mechanism, thereby distinguishing seasonal frost mounds from palsas. |
format |
Article in Journal/Newspaper |
author |
Pollard, W. H. French, H. M. |
author_facet |
Pollard, W. H. French, H. M. |
author_sort |
Pollard, W. H. |
title |
The Internal Structure and Ice Crystallography of Seasonal Frost Mounds |
title_short |
The Internal Structure and Ice Crystallography of Seasonal Frost Mounds |
title_full |
The Internal Structure and Ice Crystallography of Seasonal Frost Mounds |
title_fullStr |
The Internal Structure and Ice Crystallography of Seasonal Frost Mounds |
title_full_unstemmed |
The Internal Structure and Ice Crystallography of Seasonal Frost Mounds |
title_sort |
internal structure and ice crystallography of seasonal frost mounds |
publisher |
Cambridge University Press (CUP) |
publishDate |
1985 |
url |
http://dx.doi.org/10.1017/s0022143000006407 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022143000006407 |
genre |
ice core Journal of Glaciology palsas |
genre_facet |
ice core Journal of Glaciology palsas |
op_source |
Journal of Glaciology volume 31, issue 108, page 157-162 ISSN 0022-1430 1727-5652 |
op_doi |
https://doi.org/10.1017/s0022143000006407 |
container_title |
Journal of Glaciology |
container_volume |
31 |
container_issue |
108 |
container_start_page |
157 |
op_container_end_page |
162 |
_version_ |
1768388661087305728 |