Subglacial bedform evidence for a major palaeo-ice stream and its retreat phases in Amundsen Gulf, Canadian Arctic Archipelago
Ascertaining the location of palaeo-ice streams is crucial in order to produce accurate reconstructions of palaeo-ice sheets and examine interactions with the ocean-climate system. This paper reports evidence for a major ice stream in Amundsen Gulf, Canadian Arctic Archipelago. Mapping from satellit...
Published in: | Journal of Quaternary Science |
---|---|
Main Authors: | , , |
Format: | Article in Journal/Newspaper |
Language: | unknown |
Published: |
2006
|
Subjects: | |
Online Access: | https://centaur.reading.ac.uk/4132/ |
id |
ftunivreading:oai:centaur.reading.ac.uk:4132 |
---|---|
record_format |
openpolar |
spelling |
ftunivreading:oai:centaur.reading.ac.uk:4132 2024-06-23T07:45:23+00:00 Subglacial bedform evidence for a major palaeo-ice stream and its retreat phases in Amundsen Gulf, Canadian Arctic Archipelago Stokes, C. R. Clark, C. D. Winsborrow, M. C. M. 2006 https://centaur.reading.ac.uk/4132/ unknown Stokes, C. R., Clark, C. D. and Winsborrow, M. C. M. (2006) Subglacial bedform evidence for a major palaeo-ice stream and its retreat phases in Amundsen Gulf, Canadian Arctic Archipelago. Journal of Quaternary Science, 21 (4). pp. 399-412. ISSN 0267-8179 doi: https://doi.org/10.1002/jqs.991 <https://doi.org/10.1002/jqs.991> Article NonPeerReviewed 2006 ftunivreading https://doi.org/10.1002/jqs.991 2024-06-11T14:41:45Z Ascertaining the location of palaeo-ice streams is crucial in order to produce accurate reconstructions of palaeo-ice sheets and examine interactions with the ocean-climate system. This paper reports evidence for a major ice stream in Amundsen Gulf, Canadian Arctic Archipelago. Mapping from satellite imagery (Landsat ETM+) and digital elevation models, including bathymetric data, is used to reconstruct flow-patterns on southwestern Victoria Island and the adjacent mainland (Nunavut and Northwest Territories). Several flow-sets indicative of ice streaming are found feeding into the marine trough and cross-cutting relationships between these flow-sets (and utilising previously published radiocarbon dates) reveal several phases of ice stream activity centred in Amundsen Gulf and Dolphin and Union Strait. A large erosional footprint on the continental shelf indicates that the ice stream (ca. 1000 km long and ca. 150 km wide) filled Amundsen Gulf, probably at the Last Glacial Maximum. Subsequent to this, the ice stream reorganised as the margin retreated back along the marine trough, eventually splitting into two separate low-gradient lobes in Prince Albert Sound and Dolphin and Union Strait. The location of this major ice stream holds important implications for ice sheet-ocean interactions and specifically, the development of Arctic Ocean ice shelves and the delivery of icebergs into the western Arctic Ocean during the late Pleistocene. Copyright (C) 2006 John Wiley & Sons, Ltd. Article in Journal/Newspaper Amundsen Gulf Arctic Arctic Archipelago Arctic Arctic Ocean Canadian Arctic Archipelago Dolphin and Union Strait Ice Sheet Ice Shelves Iceberg* Northwest Territories Nunavut Prince Albert Sound Victoria Island CentAUR: Central Archive at the University of Reading Arctic Arctic Ocean Canadian Arctic Archipelago Northwest Territories Nunavut Prince Albert Sound ENVELOPE(-115.004,-115.004,70.418,70.418) Journal of Quaternary Science 21 4 399 412 |
institution |
Open Polar |
collection |
CentAUR: Central Archive at the University of Reading |
op_collection_id |
ftunivreading |
language |
unknown |
description |
Ascertaining the location of palaeo-ice streams is crucial in order to produce accurate reconstructions of palaeo-ice sheets and examine interactions with the ocean-climate system. This paper reports evidence for a major ice stream in Amundsen Gulf, Canadian Arctic Archipelago. Mapping from satellite imagery (Landsat ETM+) and digital elevation models, including bathymetric data, is used to reconstruct flow-patterns on southwestern Victoria Island and the adjacent mainland (Nunavut and Northwest Territories). Several flow-sets indicative of ice streaming are found feeding into the marine trough and cross-cutting relationships between these flow-sets (and utilising previously published radiocarbon dates) reveal several phases of ice stream activity centred in Amundsen Gulf and Dolphin and Union Strait. A large erosional footprint on the continental shelf indicates that the ice stream (ca. 1000 km long and ca. 150 km wide) filled Amundsen Gulf, probably at the Last Glacial Maximum. Subsequent to this, the ice stream reorganised as the margin retreated back along the marine trough, eventually splitting into two separate low-gradient lobes in Prince Albert Sound and Dolphin and Union Strait. The location of this major ice stream holds important implications for ice sheet-ocean interactions and specifically, the development of Arctic Ocean ice shelves and the delivery of icebergs into the western Arctic Ocean during the late Pleistocene. Copyright (C) 2006 John Wiley & Sons, Ltd. |
format |
Article in Journal/Newspaper |
author |
Stokes, C. R. Clark, C. D. Winsborrow, M. C. M. |
spellingShingle |
Stokes, C. R. Clark, C. D. Winsborrow, M. C. M. Subglacial bedform evidence for a major palaeo-ice stream and its retreat phases in Amundsen Gulf, Canadian Arctic Archipelago |
author_facet |
Stokes, C. R. Clark, C. D. Winsborrow, M. C. M. |
author_sort |
Stokes, C. R. |
title |
Subglacial bedform evidence for a major palaeo-ice stream and its retreat phases in Amundsen Gulf, Canadian Arctic Archipelago |
title_short |
Subglacial bedform evidence for a major palaeo-ice stream and its retreat phases in Amundsen Gulf, Canadian Arctic Archipelago |
title_full |
Subglacial bedform evidence for a major palaeo-ice stream and its retreat phases in Amundsen Gulf, Canadian Arctic Archipelago |
title_fullStr |
Subglacial bedform evidence for a major palaeo-ice stream and its retreat phases in Amundsen Gulf, Canadian Arctic Archipelago |
title_full_unstemmed |
Subglacial bedform evidence for a major palaeo-ice stream and its retreat phases in Amundsen Gulf, Canadian Arctic Archipelago |
title_sort |
subglacial bedform evidence for a major palaeo-ice stream and its retreat phases in amundsen gulf, canadian arctic archipelago |
publishDate |
2006 |
url |
https://centaur.reading.ac.uk/4132/ |
long_lat |
ENVELOPE(-115.004,-115.004,70.418,70.418) |
geographic |
Arctic Arctic Ocean Canadian Arctic Archipelago Northwest Territories Nunavut Prince Albert Sound |
geographic_facet |
Arctic Arctic Ocean Canadian Arctic Archipelago Northwest Territories Nunavut Prince Albert Sound |
genre |
Amundsen Gulf Arctic Arctic Archipelago Arctic Arctic Ocean Canadian Arctic Archipelago Dolphin and Union Strait Ice Sheet Ice Shelves Iceberg* Northwest Territories Nunavut Prince Albert Sound Victoria Island |
genre_facet |
Amundsen Gulf Arctic Arctic Archipelago Arctic Arctic Ocean Canadian Arctic Archipelago Dolphin and Union Strait Ice Sheet Ice Shelves Iceberg* Northwest Territories Nunavut Prince Albert Sound Victoria Island |
op_relation |
Stokes, C. R., Clark, C. D. and Winsborrow, M. C. M. (2006) Subglacial bedform evidence for a major palaeo-ice stream and its retreat phases in Amundsen Gulf, Canadian Arctic Archipelago. Journal of Quaternary Science, 21 (4). pp. 399-412. ISSN 0267-8179 doi: https://doi.org/10.1002/jqs.991 <https://doi.org/10.1002/jqs.991> |
op_doi |
https://doi.org/10.1002/jqs.991 |
container_title |
Journal of Quaternary Science |
container_volume |
21 |
container_issue |
4 |
container_start_page |
399 |
op_container_end_page |
412 |
_version_ |
1802639549982048256 |