Geomorphological signature and flow dynamics of The Minch palaeo-ice stream, NW Scotland
Large-scale streamlined glacial landforms are identified in 11 areas of northwest Scotland, from the Isle of Skye in the south to the Butt of Lewis in the north. These ice-directional features occur in bedrock and superficial deposits, generally below 350 m above sea level, and where best developed...
Published in: | Journal of Quaternary Science |
---|---|
Main Authors: | , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
John Wiley and Sons.
2007
|
Subjects: | |
Online Access: | http://nora.nerc.ac.uk/id/eprint/2360/ https://nora.nerc.ac.uk/id/eprint/2360/1/BRADWELL_etal_2007A_nora.pdf http://www3.interscience.wiley.com/cgi-bin/fulltext/114030601/PDFSTART |
id |
ftnerc:oai:nora.nerc.ac.uk:2360 |
---|---|
record_format |
openpolar |
spelling |
ftnerc:oai:nora.nerc.ac.uk:2360 2024-06-09T07:46:49+00:00 Geomorphological signature and flow dynamics of The Minch palaeo-ice stream, NW Scotland Bradwell, Tom Stoker, Martyn Larter, Robert 2007 text http://nora.nerc.ac.uk/id/eprint/2360/ https://nora.nerc.ac.uk/id/eprint/2360/1/BRADWELL_etal_2007A_nora.pdf http://www3.interscience.wiley.com/cgi-bin/fulltext/114030601/PDFSTART en eng John Wiley and Sons. https://nora.nerc.ac.uk/id/eprint/2360/1/BRADWELL_etal_2007A_nora.pdf Bradwell, Tom; Stoker, Martyn; Larter, Robert orcid:0000-0002-8414-7389 . 2007 Geomorphological signature and flow dynamics of The Minch palaeo-ice stream, NW Scotland. Journal of Quaternary Science, 22. 609-617. https://doi.org/10.1002/jqs.1080 <https://doi.org/10.1002/jqs.1080> Glaciology Earth Sciences Publication - Article PeerReviewed 2007 ftnerc https://doi.org/10.1002/jqs.1080 2024-05-15T08:42:16Z Large-scale streamlined glacial landforms are identified in 11 areas of northwest Scotland, from the Isle of Skye in the south to the Butt of Lewis in the north. These ice-directional features occur in bedrock and superficial deposits, generally below 350 m above sea level, and where best developed have elongation ratios of >20:1. Sidescan sonar and multibeam echo-sounding data from The Minch show elongate streamlined ridges and grooves on the seabed, with elongation ratios of up to 70:1. These bedforms are interpreted as mega-scale glacial lineations. All the features identified formed beneath The Minch palaeo-ice stream which was ca. 200 km long, up to 50 km wide and drained ca. 15 000 km2 of the northwest sector of the last British-Irish Ice Sheet (Late Devensian Glaciation). Nine ice-stream tributaries and palaeo-onset zones are also identified, on the basis of geomorphological evidence. The spatial distribution and pattern of streamlined bedforms around The Minch has enabled the catchment, flow paths and basal shear stresses of the palaeo-ice stream and its tributaries to be tentatively reconstructed. Article in Journal/Newspaper Ice Sheet Natural Environment Research Council: NERC Open Research Archive Journal of Quaternary Science 22 6 609 617 |
institution |
Open Polar |
collection |
Natural Environment Research Council: NERC Open Research Archive |
op_collection_id |
ftnerc |
language |
English |
topic |
Glaciology Earth Sciences |
spellingShingle |
Glaciology Earth Sciences Bradwell, Tom Stoker, Martyn Larter, Robert Geomorphological signature and flow dynamics of The Minch palaeo-ice stream, NW Scotland |
topic_facet |
Glaciology Earth Sciences |
description |
Large-scale streamlined glacial landforms are identified in 11 areas of northwest Scotland, from the Isle of Skye in the south to the Butt of Lewis in the north. These ice-directional features occur in bedrock and superficial deposits, generally below 350 m above sea level, and where best developed have elongation ratios of >20:1. Sidescan sonar and multibeam echo-sounding data from The Minch show elongate streamlined ridges and grooves on the seabed, with elongation ratios of up to 70:1. These bedforms are interpreted as mega-scale glacial lineations. All the features identified formed beneath The Minch palaeo-ice stream which was ca. 200 km long, up to 50 km wide and drained ca. 15 000 km2 of the northwest sector of the last British-Irish Ice Sheet (Late Devensian Glaciation). Nine ice-stream tributaries and palaeo-onset zones are also identified, on the basis of geomorphological evidence. The spatial distribution and pattern of streamlined bedforms around The Minch has enabled the catchment, flow paths and basal shear stresses of the palaeo-ice stream and its tributaries to be tentatively reconstructed. |
format |
Article in Journal/Newspaper |
author |
Bradwell, Tom Stoker, Martyn Larter, Robert |
author_facet |
Bradwell, Tom Stoker, Martyn Larter, Robert |
author_sort |
Bradwell, Tom |
title |
Geomorphological signature and flow dynamics of The Minch palaeo-ice stream, NW Scotland |
title_short |
Geomorphological signature and flow dynamics of The Minch palaeo-ice stream, NW Scotland |
title_full |
Geomorphological signature and flow dynamics of The Minch palaeo-ice stream, NW Scotland |
title_fullStr |
Geomorphological signature and flow dynamics of The Minch palaeo-ice stream, NW Scotland |
title_full_unstemmed |
Geomorphological signature and flow dynamics of The Minch palaeo-ice stream, NW Scotland |
title_sort |
geomorphological signature and flow dynamics of the minch palaeo-ice stream, nw scotland |
publisher |
John Wiley and Sons. |
publishDate |
2007 |
url |
http://nora.nerc.ac.uk/id/eprint/2360/ https://nora.nerc.ac.uk/id/eprint/2360/1/BRADWELL_etal_2007A_nora.pdf http://www3.interscience.wiley.com/cgi-bin/fulltext/114030601/PDFSTART |
genre |
Ice Sheet |
genre_facet |
Ice Sheet |
op_relation |
https://nora.nerc.ac.uk/id/eprint/2360/1/BRADWELL_etal_2007A_nora.pdf Bradwell, Tom; Stoker, Martyn; Larter, Robert orcid:0000-0002-8414-7389 . 2007 Geomorphological signature and flow dynamics of The Minch palaeo-ice stream, NW Scotland. Journal of Quaternary Science, 22. 609-617. https://doi.org/10.1002/jqs.1080 <https://doi.org/10.1002/jqs.1080> |
op_doi |
https://doi.org/10.1002/jqs.1080 |
container_title |
Journal of Quaternary Science |
container_volume |
22 |
container_issue |
6 |
container_start_page |
609 |
op_container_end_page |
617 |
_version_ |
1801376812314394624 |