Syngenetic sand veins and anti-syngenetic sand wedges, Tuktoyaktuk Coastlands, western Arctic Canada
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 c...
Published in: | Permafrost and Periglacial Processes |
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Online Access: | http://sro.sussex.ac.uk/id/eprint/1594/ http://sro.sussex.ac.uk/id/eprint/1594/1/Revised_text_PPP_721.pdf https://doi.org/10.1002/ppp.577 |
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ftunivsussex:oai:sro.sussex.ac.uk:1594 2023-07-30T03:59:46+02:00 Syngenetic sand veins and anti-syngenetic sand wedges, Tuktoyaktuk Coastlands, western Arctic Canada Murton, Julian Bateman, Mark 2007-02 application/pdf http://sro.sussex.ac.uk/id/eprint/1594/ http://sro.sussex.ac.uk/id/eprint/1594/1/Revised_text_PPP_721.pdf https://doi.org/10.1002/ppp.577 en eng http://sro.sussex.ac.uk/id/eprint/1594/1/Revised_text_PPP_721.pdf Murton, Julian and Bateman, Mark (2007) Syngenetic sand veins and anti-syngenetic sand wedges, Tuktoyaktuk Coastlands, western Arctic Canada. Permafrost and Periglacial Processes, 18 (1). pp. 33-47. ISSN 1045-6740 G Geography (General) Article PeerReviewed 2007 ftunivsussex https://doi.org/10.1002/ppp.577 2023-07-11T20:07:16Z 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. Article in Journal/Newspaper Arctic Arctic Ice permafrost Permafrost and Periglacial Processes wedge* University of Sussex: Sussex Research Online Arctic Canada Tuktoyaktuk ENVELOPE(-133.006,-133.006,69.425,69.425) Permafrost and Periglacial Processes 18 1 33 47 |
institution |
Open Polar |
collection |
University of Sussex: Sussex Research Online |
op_collection_id |
ftunivsussex |
language |
English |
topic |
G Geography (General) |
spellingShingle |
G Geography (General) Murton, Julian Bateman, Mark Syngenetic sand veins and anti-syngenetic sand wedges, Tuktoyaktuk Coastlands, western Arctic Canada |
topic_facet |
G Geography (General) |
description |
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. |
format |
Article in Journal/Newspaper |
author |
Murton, Julian Bateman, Mark |
author_facet |
Murton, Julian Bateman, Mark |
author_sort |
Murton, Julian |
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 |
publishDate |
2007 |
url |
http://sro.sussex.ac.uk/id/eprint/1594/ http://sro.sussex.ac.uk/id/eprint/1594/1/Revised_text_PPP_721.pdf https://doi.org/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 Arctic Ice permafrost Permafrost and Periglacial Processes wedge* |
genre_facet |
Arctic Arctic Ice permafrost Permafrost and Periglacial Processes wedge* |
op_relation |
http://sro.sussex.ac.uk/id/eprint/1594/1/Revised_text_PPP_721.pdf Murton, Julian and Bateman, Mark (2007) Syngenetic sand veins and anti-syngenetic sand wedges, Tuktoyaktuk Coastlands, western Arctic Canada. Permafrost and Periglacial Processes, 18 (1). pp. 33-47. ISSN 1045-6740 |
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_ |
1772810559028199424 |