Ice Lithologies and Structure of Ice Island Arlis II
Abstract Ice island ARLIS II, which is adrift in the Arctic Ocean, is a 1.3 km. wide and 3.8 km. long fragment of shelf ice 12–25 m. thick, which preserves several structural features heretofore undescribed in ice. The island is composed of an irregular central block of foliated, locally debris-rich...
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Cambridge University Press (CUP)
1964
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Online Access: | http://dx.doi.org/10.1017/s0022143000028550 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022143000028550 |
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crcambridgeupr:10.1017/s0022143000028550 2024-03-03T08:42:13+00:00 Ice Lithologies and Structure of Ice Island Arlis II Smith, David D. 1964 http://dx.doi.org/10.1017/s0022143000028550 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022143000028550 en eng Cambridge University Press (CUP) Journal of Glaciology volume 5, issue 37, page 17-38 ISSN 0022-1430 1727-5652 Earth-Surface Processes journal-article 1964 crcambridgeupr https://doi.org/10.1017/s0022143000028550 2024-02-08T08:36:10Z Abstract Ice island ARLIS II, which is adrift in the Arctic Ocean, is a 1.3 km. wide and 3.8 km. long fragment of shelf ice 12–25 m. thick, which preserves several structural features heretofore undescribed in ice. The island is composed of an irregular central block of foliated, locally debris-rich, grey glacial ice bordered in part by extensive areas of stratified bluish sea ice. The central block contains a series of narrow, elongate, sub-parallel dike-like septa of massive fresh-water ice and a large tongue-like body of tightly folded, coarse banded ice. Both the septa and the tongue cut across the foliation and debris zones of the grey ice. The margins of the central block are penetrated by a series of elongate, crudely wedge-shaped re-entrants occupied by salients of bluish sea ice. Two broad, arch-like plunging anticlines deform the stratified sea ice along one margin of the block. The foliation and debris zones in the glacial ice are relict features inherited from the source glacier. The septa formed as crevasse and basal fracture fills. Salients represent fills formed in the irregular re-entrants along the margins of the glacial ice mass. The tongue of tightly folded, banded ice represents an earlier generation salient deformed by compressive forces as the fill built up. The broad anticlines are apparently the result of warping in response to differential ablation but the small, tight plunging folds on their noses and limbs are probably the result of compressive forces. Article in Journal/Newspaper Arctic Arctic Ocean Journal of Glaciology Sea ice Cambridge University Press Arctic Arctic Ocean Journal of Glaciology 5 37 17 38 |
institution |
Open Polar |
collection |
Cambridge University Press |
op_collection_id |
crcambridgeupr |
language |
English |
topic |
Earth-Surface Processes |
spellingShingle |
Earth-Surface Processes Smith, David D. Ice Lithologies and Structure of Ice Island Arlis II |
topic_facet |
Earth-Surface Processes |
description |
Abstract Ice island ARLIS II, which is adrift in the Arctic Ocean, is a 1.3 km. wide and 3.8 km. long fragment of shelf ice 12–25 m. thick, which preserves several structural features heretofore undescribed in ice. The island is composed of an irregular central block of foliated, locally debris-rich, grey glacial ice bordered in part by extensive areas of stratified bluish sea ice. The central block contains a series of narrow, elongate, sub-parallel dike-like septa of massive fresh-water ice and a large tongue-like body of tightly folded, coarse banded ice. Both the septa and the tongue cut across the foliation and debris zones of the grey ice. The margins of the central block are penetrated by a series of elongate, crudely wedge-shaped re-entrants occupied by salients of bluish sea ice. Two broad, arch-like plunging anticlines deform the stratified sea ice along one margin of the block. The foliation and debris zones in the glacial ice are relict features inherited from the source glacier. The septa formed as crevasse and basal fracture fills. Salients represent fills formed in the irregular re-entrants along the margins of the glacial ice mass. The tongue of tightly folded, banded ice represents an earlier generation salient deformed by compressive forces as the fill built up. The broad anticlines are apparently the result of warping in response to differential ablation but the small, tight plunging folds on their noses and limbs are probably the result of compressive forces. |
format |
Article in Journal/Newspaper |
author |
Smith, David D. |
author_facet |
Smith, David D. |
author_sort |
Smith, David D. |
title |
Ice Lithologies and Structure of Ice Island Arlis II |
title_short |
Ice Lithologies and Structure of Ice Island Arlis II |
title_full |
Ice Lithologies and Structure of Ice Island Arlis II |
title_fullStr |
Ice Lithologies and Structure of Ice Island Arlis II |
title_full_unstemmed |
Ice Lithologies and Structure of Ice Island Arlis II |
title_sort |
ice lithologies and structure of ice island arlis ii |
publisher |
Cambridge University Press (CUP) |
publishDate |
1964 |
url |
http://dx.doi.org/10.1017/s0022143000028550 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022143000028550 |
geographic |
Arctic Arctic Ocean |
geographic_facet |
Arctic Arctic Ocean |
genre |
Arctic Arctic Ocean Journal of Glaciology Sea ice |
genre_facet |
Arctic Arctic Ocean Journal of Glaciology Sea ice |
op_source |
Journal of Glaciology volume 5, issue 37, page 17-38 ISSN 0022-1430 1727-5652 |
op_doi |
https://doi.org/10.1017/s0022143000028550 |
container_title |
Journal of Glaciology |
container_volume |
5 |
container_issue |
37 |
container_start_page |
17 |
op_container_end_page |
38 |
_version_ |
1792497666303721472 |