Syngenetic sand veins and anti‐syngenetic sand wedges, Tuktoyaktuk Coastlands, western Arctic Canada
Abstract Sand‐sheet deposits of full‐glacial age in the Tuktoyaktuk Coastlands, western Arctic Canada, contain syngenetic sand veins 1–21 cm wide and sometimes exceeding 9 m in height. Their tall and narrow, chimney‐like morphology differs from that of known syngenetic ice wedges and indicates an un...
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crwiley:10.1002/ppp.577 2024-06-02T08:01:40+00:00 Syngenetic sand veins and anti‐syngenetic sand wedges, Tuktoyaktuk Coastlands, western Arctic Canada Murton, Julian B. Bateman, Mark D. 2007 http://dx.doi.org/10.1002/ppp.577 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fppp.577 https://onlinelibrary.wiley.com/doi/pdf/10.1002/ppp.577 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Permafrost and Periglacial Processes volume 18, issue 1, page 33-47 ISSN 1045-6740 1099-1530 journal-article 2007 crwiley https://doi.org/10.1002/ppp.577 2024-05-03T11:37:50Z Abstract Sand‐sheet deposits of full‐glacial age in the Tuktoyaktuk Coastlands, western Arctic Canada, contain syngenetic sand veins 1–21 cm wide and sometimes exceeding 9 m in height. Their tall and narrow, chimney‐like morphology differs from that of known syngenetic ice wedges and indicates an unusually close balance between the rate of sand‐sheet aggradation and the frequency of thermal‐contraction cracking. The sand sheets also contain rejuvenated (syngenetic) sand wedges that have grown upward from an erosion surface. By contrast, sand sheets of postglacial age contain few or sometimes no intraformational sand veins and wedges, suggesting that the climatic conditions were unfavourable for thermal‐contraction cracking. Beneath a postglacial sand sheet near Johnson Bay, sand wedges with unusually wide tops (≤3.9 m) extend down from a prominent erosion surface. The wedges grew vertically downward during deflation of the ground surface, and represent anti‐syngenetic wedges. The distribution of sand veins and wedges within the sand sheets indicates that the existence of continuous permafrost during sand‐sheet aggradation can be inferred confidently only during full‐glacial conditions. Copyright © 2007 John Wiley & Sons, Ltd. Article in Journal/Newspaper Arctic Ice permafrost Permafrost and Periglacial Processes wedge* Wiley Online Library Arctic Canada Tuktoyaktuk ENVELOPE(-133.006,-133.006,69.425,69.425) Permafrost and Periglacial Processes 18 1 33 47 |
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Open Polar |
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Wiley Online Library |
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crwiley |
language |
English |
description |
Abstract Sand‐sheet deposits of full‐glacial age in the Tuktoyaktuk Coastlands, western Arctic Canada, contain syngenetic sand veins 1–21 cm wide and sometimes exceeding 9 m in height. Their tall and narrow, chimney‐like morphology differs from that of known syngenetic ice wedges and indicates an unusually close balance between the rate of sand‐sheet aggradation and the frequency of thermal‐contraction cracking. The sand sheets also contain rejuvenated (syngenetic) sand wedges that have grown upward from an erosion surface. By contrast, sand sheets of postglacial age contain few or sometimes no intraformational sand veins and wedges, suggesting that the climatic conditions were unfavourable for thermal‐contraction cracking. Beneath a postglacial sand sheet near Johnson Bay, sand wedges with unusually wide tops (≤3.9 m) extend down from a prominent erosion surface. The wedges grew vertically downward during deflation of the ground surface, and represent anti‐syngenetic wedges. The distribution of sand veins and wedges within the sand sheets indicates that the existence of continuous permafrost during sand‐sheet aggradation can be inferred confidently only during full‐glacial conditions. Copyright © 2007 John Wiley & Sons, Ltd. |
format |
Article in Journal/Newspaper |
author |
Murton, Julian B. Bateman, Mark D. |
spellingShingle |
Murton, Julian B. Bateman, Mark D. Syngenetic sand veins and anti‐syngenetic sand wedges, Tuktoyaktuk Coastlands, western Arctic Canada |
author_facet |
Murton, Julian B. Bateman, Mark D. |
author_sort |
Murton, Julian B. |
title |
Syngenetic sand veins and anti‐syngenetic sand wedges, Tuktoyaktuk Coastlands, western Arctic Canada |
title_short |
Syngenetic sand veins and anti‐syngenetic sand wedges, Tuktoyaktuk Coastlands, western Arctic Canada |
title_full |
Syngenetic sand veins and anti‐syngenetic sand wedges, Tuktoyaktuk Coastlands, western Arctic Canada |
title_fullStr |
Syngenetic sand veins and anti‐syngenetic sand wedges, Tuktoyaktuk Coastlands, western Arctic Canada |
title_full_unstemmed |
Syngenetic sand veins and anti‐syngenetic sand wedges, Tuktoyaktuk Coastlands, western Arctic Canada |
title_sort |
syngenetic sand veins and anti‐syngenetic sand wedges, tuktoyaktuk coastlands, western arctic canada |
publisher |
Wiley |
publishDate |
2007 |
url |
http://dx.doi.org/10.1002/ppp.577 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fppp.577 https://onlinelibrary.wiley.com/doi/pdf/10.1002/ppp.577 |
long_lat |
ENVELOPE(-133.006,-133.006,69.425,69.425) |
geographic |
Arctic Canada Tuktoyaktuk |
geographic_facet |
Arctic Canada Tuktoyaktuk |
genre |
Arctic Ice permafrost Permafrost and Periglacial Processes wedge* |
genre_facet |
Arctic Ice permafrost Permafrost and Periglacial Processes wedge* |
op_source |
Permafrost and Periglacial Processes volume 18, issue 1, page 33-47 ISSN 1045-6740 1099-1530 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1002/ppp.577 |
container_title |
Permafrost and Periglacial Processes |
container_volume |
18 |
container_issue |
1 |
container_start_page |
33 |
op_container_end_page |
47 |
_version_ |
1800746076189229056 |