High-resolution reconstruction of the last ice sheet in NW Scotland
Reconstructions of the last (late Devensian) British ice sheet have hitherto been based on assumptions regarding its extent and form. Here we employ observational evidence for the maximum altitude of glacial erosion (trimlines) on mountains that protruded through the ice (palaeonunataks) to reconstr...
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1998
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Online Access: | https://risweb.st-andrews.ac.uk/portal/en/researchoutput/highresolution-reconstruction-of-the-last-ice-sheet-in-nw-scotland(57a9dcfe-559c-47cd-9b8b-9396ab61caa4).html http://www.scopus.com/inward/record.url?scp=0032448615&partnerID=8YFLogxK |
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ftunstandrewcris:oai:risweb.st-andrews.ac.uk:publications/57a9dcfe-559c-47cd-9b8b-9396ab61caa4 2023-05-15T16:38:14+02:00 High-resolution reconstruction of the last ice sheet in NW Scotland Ballantyne, Colin Kerr McCarroll, D Nesje, A Dahl, SO Stone, SO Fifield, LK 1998-04 https://risweb.st-andrews.ac.uk/portal/en/researchoutput/highresolution-reconstruction-of-the-last-ice-sheet-in-nw-scotland(57a9dcfe-559c-47cd-9b8b-9396ab61caa4).html http://www.scopus.com/inward/record.url?scp=0032448615&partnerID=8YFLogxK eng eng info:eu-repo/semantics/restrictedAccess Ballantyne , C K , McCarroll , D , Nesje , A , Dahl , SO , Stone , SO & Fifield , LK 1998 , ' High-resolution reconstruction of the last ice sheet in NW Scotland ' , Terra Nova , vol. 10 , pp. 63-67 . CONTINENTAL-SHELF WEST DEVENSIAN GLACIATION NORTHWEST SCOTLAND FORMER NUNATAKS OUTER HEBRIDES ALTITUDE SOILS article 1998 ftunstandrewcris 2021-12-26T14:10:30Z Reconstructions of the last (late Devensian) British ice sheet have hitherto been based on assumptions regarding its extent and form. Here we employ observational evidence for the maximum altitude of glacial erosion (trimlines) on mountains that protruded through the ice (palaeonunataks) to reconstruct the form of the ice sheet over approximate to 10 000 km(2) of NW Scotland, Contrasts in the clay mineralogy of soils and exposure ages of rock surfaces above and below these trimlines confirm that they represent the upper limit of late Devensian glacial erosion. The reconstruction yields realistic values of basal shear stress and is consistent with independent evidence of ice movement directions. The ice sheet reached approximate to 950 m altitude over the present N-S watershed, descended northwards and north-westwards, was deflected around an ice dome on Skye and an independent Outer Hebrides ice cap, and probably extended across the adjacent shelf on a bed of deforming sediments. Article in Journal/Newspaper Ice cap Ice Sheet University of St Andrews: Research Portal |
institution |
Open Polar |
collection |
University of St Andrews: Research Portal |
op_collection_id |
ftunstandrewcris |
language |
English |
topic |
CONTINENTAL-SHELF WEST DEVENSIAN GLACIATION NORTHWEST SCOTLAND FORMER NUNATAKS OUTER HEBRIDES ALTITUDE SOILS |
spellingShingle |
CONTINENTAL-SHELF WEST DEVENSIAN GLACIATION NORTHWEST SCOTLAND FORMER NUNATAKS OUTER HEBRIDES ALTITUDE SOILS Ballantyne, Colin Kerr McCarroll, D Nesje, A Dahl, SO Stone, SO Fifield, LK High-resolution reconstruction of the last ice sheet in NW Scotland |
topic_facet |
CONTINENTAL-SHELF WEST DEVENSIAN GLACIATION NORTHWEST SCOTLAND FORMER NUNATAKS OUTER HEBRIDES ALTITUDE SOILS |
description |
Reconstructions of the last (late Devensian) British ice sheet have hitherto been based on assumptions regarding its extent and form. Here we employ observational evidence for the maximum altitude of glacial erosion (trimlines) on mountains that protruded through the ice (palaeonunataks) to reconstruct the form of the ice sheet over approximate to 10 000 km(2) of NW Scotland, Contrasts in the clay mineralogy of soils and exposure ages of rock surfaces above and below these trimlines confirm that they represent the upper limit of late Devensian glacial erosion. The reconstruction yields realistic values of basal shear stress and is consistent with independent evidence of ice movement directions. The ice sheet reached approximate to 950 m altitude over the present N-S watershed, descended northwards and north-westwards, was deflected around an ice dome on Skye and an independent Outer Hebrides ice cap, and probably extended across the adjacent shelf on a bed of deforming sediments. |
format |
Article in Journal/Newspaper |
author |
Ballantyne, Colin Kerr McCarroll, D Nesje, A Dahl, SO Stone, SO Fifield, LK |
author_facet |
Ballantyne, Colin Kerr McCarroll, D Nesje, A Dahl, SO Stone, SO Fifield, LK |
author_sort |
Ballantyne, Colin Kerr |
title |
High-resolution reconstruction of the last ice sheet in NW Scotland |
title_short |
High-resolution reconstruction of the last ice sheet in NW Scotland |
title_full |
High-resolution reconstruction of the last ice sheet in NW Scotland |
title_fullStr |
High-resolution reconstruction of the last ice sheet in NW Scotland |
title_full_unstemmed |
High-resolution reconstruction of the last ice sheet in NW Scotland |
title_sort |
high-resolution reconstruction of the last ice sheet in nw scotland |
publishDate |
1998 |
url |
https://risweb.st-andrews.ac.uk/portal/en/researchoutput/highresolution-reconstruction-of-the-last-ice-sheet-in-nw-scotland(57a9dcfe-559c-47cd-9b8b-9396ab61caa4).html http://www.scopus.com/inward/record.url?scp=0032448615&partnerID=8YFLogxK |
genre |
Ice cap Ice Sheet |
genre_facet |
Ice cap Ice Sheet |
op_source |
Ballantyne , C K , McCarroll , D , Nesje , A , Dahl , SO , Stone , SO & Fifield , LK 1998 , ' High-resolution reconstruction of the last ice sheet in NW Scotland ' , Terra Nova , vol. 10 , pp. 63-67 . |
op_rights |
info:eu-repo/semantics/restrictedAccess |
_version_ |
1766028519699120128 |