A geomorphic investigation of retrogressive thaw slumps and active layer slides on Herschel Island, Yukon Territory /
This thesis investigates the geomorphology of retrogressive thaw slumps and active layer slides on Herschel Island, northern Yukon Territory. In particular, it examines the formation and morphology of both landforms, and the ground ice characteristics of retrogressive thaw slumps. During 1988-1989 a...
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McGill University
1990
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ftcanadathes:oai:collectionscanada.gc.ca:QMM.59632 2023-05-15T16:34:37+02:00 A geomorphic investigation of retrogressive thaw slumps and active layer slides on Herschel Island, Yukon Territory / De krom, Valentina Master of Science (Department of Geography.) 1990 application/pdf http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=59632 en eng McGill University alephsysno: 001168313 proquestno: AAIMM66369 Theses scanned by UMI/ProQuest. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=59632 All items in eScholarship@McGill are protected by copyright with all rights reserved unless otherwise indicated. Geomorphology -- Yukon -- Herschel Island Landforms -- Yukon -- Herschel Island Earthflows -- Yukon -- Herschel Island Thermokarst Electronic Thesis or Dissertation 1990 ftcanadathes 2014-02-16T00:58:13Z This thesis investigates the geomorphology of retrogressive thaw slumps and active layer slides on Herschel Island, northern Yukon Territory. In particular, it examines the formation and morphology of both landforms, and the ground ice characteristics of retrogressive thaw slumps. During 1988-1989 a number of retrogressive thaw slumps and active layer slides were surveyed and monitored. Field and laboratory investigations involved (1) documentation of landform distribution, setting and morphology, (2) examination of processes of landform formation, and (3) the examination of cryostratigraphy, ground ice characteristics and material properties. Retrogressive thaw slumps developed in areas of low to moderate slopes underlain by a variety of sediments with ice contents up to 4500% (on a dry weight basis). Slump headwall retreat rates of up to 19.5 m/yr were recorded. By comparison, active layer slides developed on steeper slopes underlain mainly by marine silts and clays. The sediments exposed in the slide floors and headwalls displayed no visible ground ice, but moisture contents were between 15-35%. Retrogressive thaw slumps and active layer slides form by entirely different processes. However, they do occur in close association and are influenced by many of the same parameters. Thesis Herschel Herschel Island Thermokarst Yukon Theses Canada/Thèses Canada (Library and Archives Canada) Yukon Herschel Island ENVELOPE(-139.089,-139.089,69.583,69.583) |
institution |
Open Polar |
collection |
Theses Canada/Thèses Canada (Library and Archives Canada) |
op_collection_id |
ftcanadathes |
language |
English |
topic |
Geomorphology -- Yukon -- Herschel Island Landforms -- Yukon -- Herschel Island Earthflows -- Yukon -- Herschel Island Thermokarst |
spellingShingle |
Geomorphology -- Yukon -- Herschel Island Landforms -- Yukon -- Herschel Island Earthflows -- Yukon -- Herschel Island Thermokarst De krom, Valentina A geomorphic investigation of retrogressive thaw slumps and active layer slides on Herschel Island, Yukon Territory / |
topic_facet |
Geomorphology -- Yukon -- Herschel Island Landforms -- Yukon -- Herschel Island Earthflows -- Yukon -- Herschel Island Thermokarst |
description |
This thesis investigates the geomorphology of retrogressive thaw slumps and active layer slides on Herschel Island, northern Yukon Territory. In particular, it examines the formation and morphology of both landforms, and the ground ice characteristics of retrogressive thaw slumps. During 1988-1989 a number of retrogressive thaw slumps and active layer slides were surveyed and monitored. Field and laboratory investigations involved (1) documentation of landform distribution, setting and morphology, (2) examination of processes of landform formation, and (3) the examination of cryostratigraphy, ground ice characteristics and material properties. Retrogressive thaw slumps developed in areas of low to moderate slopes underlain by a variety of sediments with ice contents up to 4500% (on a dry weight basis). Slump headwall retreat rates of up to 19.5 m/yr were recorded. By comparison, active layer slides developed on steeper slopes underlain mainly by marine silts and clays. The sediments exposed in the slide floors and headwalls displayed no visible ground ice, but moisture contents were between 15-35%. Retrogressive thaw slumps and active layer slides form by entirely different processes. However, they do occur in close association and are influenced by many of the same parameters. |
format |
Thesis |
author |
De krom, Valentina |
author_facet |
De krom, Valentina |
author_sort |
De krom, Valentina |
title |
A geomorphic investigation of retrogressive thaw slumps and active layer slides on Herschel Island, Yukon Territory / |
title_short |
A geomorphic investigation of retrogressive thaw slumps and active layer slides on Herschel Island, Yukon Territory / |
title_full |
A geomorphic investigation of retrogressive thaw slumps and active layer slides on Herschel Island, Yukon Territory / |
title_fullStr |
A geomorphic investigation of retrogressive thaw slumps and active layer slides on Herschel Island, Yukon Territory / |
title_full_unstemmed |
A geomorphic investigation of retrogressive thaw slumps and active layer slides on Herschel Island, Yukon Territory / |
title_sort |
geomorphic investigation of retrogressive thaw slumps and active layer slides on herschel island, yukon territory / |
publisher |
McGill University |
publishDate |
1990 |
url |
http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=59632 |
op_coverage |
Master of Science (Department of Geography.) |
long_lat |
ENVELOPE(-139.089,-139.089,69.583,69.583) |
geographic |
Yukon Herschel Island |
geographic_facet |
Yukon Herschel Island |
genre |
Herschel Herschel Island Thermokarst Yukon |
genre_facet |
Herschel Herschel Island Thermokarst Yukon |
op_relation |
alephsysno: 001168313 proquestno: AAIMM66369 Theses scanned by UMI/ProQuest. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=59632 |
op_rights |
All items in eScholarship@McGill are protected by copyright with all rights reserved unless otherwise indicated. |
_version_ |
1766024566852812800 |