Age and significance of former low-altitude corrie glaciers on Hoy, Orkney Islands
Geomorphological mapping provides evidence for two former low-level corrie glaciers on Hoy, both defined by end moraines. Five Be-10 exposure ages obtained from sandstone boulders on moraine crests fall within the range 12.4 +/- 1.5 ka to 10.4 +/- 1.7 ka (weighted mean 11.7 +/- 0.6 ka), confirming t...
Published in: | Scottish Journal of Geology |
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Main Authors: | , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
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2007
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Online Access: | https://risweb.st-andrews.ac.uk/portal/en/researchoutput/age-and-significance-of-former-lowaltitude-corrie-glaciers-on-hoy-orkney-islands(61369042-a61f-432f-9d23-55f49d15881d).html https://doi.org/10.1144/sjg43020107 http://www.scopus.com/inward/record.url?scp=36249021088&partnerID=8YFLogxK http://www.landforms.eu/orkney/Library/Ballantyne%20Hoy%20Paper%20Proof.pdf |
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ftunstandrewcris:oai:risweb.st-andrews.ac.uk:publications/61369042-a61f-432f-9d23-55f49d15881d 2023-05-15T16:40:59+02:00 Age and significance of former low-altitude corrie glaciers on Hoy, Orkney Islands Ballantyne, C. K. Hall, A. M. Phillips, W. M. Binnie, S. Kubik, P.W. 2007 https://risweb.st-andrews.ac.uk/portal/en/researchoutput/age-and-significance-of-former-lowaltitude-corrie-glaciers-on-hoy-orkney-islands(61369042-a61f-432f-9d23-55f49d15881d).html https://doi.org/10.1144/sjg43020107 http://www.scopus.com/inward/record.url?scp=36249021088&partnerID=8YFLogxK http://www.landforms.eu/orkney/Library/Ballantyne%20Hoy%20Paper%20Proof.pdf eng eng info:eu-repo/semantics/restrictedAccess Ballantyne , C K , Hall , A M , Phillips , W M , Binnie , S & Kubik , P W 2007 , ' Age and significance of former low-altitude corrie glaciers on Hoy, Orkney Islands ' , Scottish Journal of Geology , vol. 43 , no. 2 , pp. 107-114 . https://doi.org/10.1144/sjg43020107 LOCH-LOMOND READVANCE NORTHERN NORTH-SEA PALEOCLIMATIC IMPLICATIONS YOUNGER DRYAS ICE-SHEET QUATERNARY GLACIATIONS COSMOGENIC NUCLIDES SCOTLAND RECONSTRUCTION RATES article 2007 ftunstandrewcris https://doi.org/10.1144/sjg43020107 2021-12-26T14:15:49Z Geomorphological mapping provides evidence for two former low-level corrie glaciers on Hoy, both defined by end moraines. Five Be-10 exposure ages obtained from sandstone boulders on moraine crests fall within the range 12.4 +/- 1.5 ka to 10.4 +/- 1.7 ka (weighted mean 11.7 +/- 0.6 ka), confirming that these glaciers developed during the Loch Lomond (Younger Dryas) Stade (LLS) of 12.9-11.5 cal. ka BP, and demonstrate the feasibility of using this approach to establish the age of LLS glacier limits. The equilibrium line altitude (ELA) of one of the glaciers (99 m) is the lowest recorded for any LLS glacier, and the area-weighted mean ELA for both (141 m) is consistent with a general northward ELA decrease along the west coast of Britain. The size of moraines fronting these small (<= 0.75 km(2)) glaciers implies that glacier termini remained at or close to their limits for a prolonged period. The apparent restriction of LLS glaciers to only two sites on Hoy probably reflects topographic favourability, and particularly the extent of snow-contributing areas. Article in Journal/Newspaper Ice Sheet University of St Andrews: Research Portal Ela ENVELOPE(9.642,9.642,63.170,63.170) Loch Lomond ENVELOPE(-125.746,-125.746,54.239,54.239) Scottish Journal of Geology 43 2 107 114 |
institution |
Open Polar |
collection |
University of St Andrews: Research Portal |
op_collection_id |
ftunstandrewcris |
language |
English |
topic |
LOCH-LOMOND READVANCE NORTHERN NORTH-SEA PALEOCLIMATIC IMPLICATIONS YOUNGER DRYAS ICE-SHEET QUATERNARY GLACIATIONS COSMOGENIC NUCLIDES SCOTLAND RECONSTRUCTION RATES |
spellingShingle |
LOCH-LOMOND READVANCE NORTHERN NORTH-SEA PALEOCLIMATIC IMPLICATIONS YOUNGER DRYAS ICE-SHEET QUATERNARY GLACIATIONS COSMOGENIC NUCLIDES SCOTLAND RECONSTRUCTION RATES Ballantyne, C. K. Hall, A. M. Phillips, W. M. Binnie, S. Kubik, P.W. Age and significance of former low-altitude corrie glaciers on Hoy, Orkney Islands |
topic_facet |
LOCH-LOMOND READVANCE NORTHERN NORTH-SEA PALEOCLIMATIC IMPLICATIONS YOUNGER DRYAS ICE-SHEET QUATERNARY GLACIATIONS COSMOGENIC NUCLIDES SCOTLAND RECONSTRUCTION RATES |
description |
Geomorphological mapping provides evidence for two former low-level corrie glaciers on Hoy, both defined by end moraines. Five Be-10 exposure ages obtained from sandstone boulders on moraine crests fall within the range 12.4 +/- 1.5 ka to 10.4 +/- 1.7 ka (weighted mean 11.7 +/- 0.6 ka), confirming that these glaciers developed during the Loch Lomond (Younger Dryas) Stade (LLS) of 12.9-11.5 cal. ka BP, and demonstrate the feasibility of using this approach to establish the age of LLS glacier limits. The equilibrium line altitude (ELA) of one of the glaciers (99 m) is the lowest recorded for any LLS glacier, and the area-weighted mean ELA for both (141 m) is consistent with a general northward ELA decrease along the west coast of Britain. The size of moraines fronting these small (<= 0.75 km(2)) glaciers implies that glacier termini remained at or close to their limits for a prolonged period. The apparent restriction of LLS glaciers to only two sites on Hoy probably reflects topographic favourability, and particularly the extent of snow-contributing areas. |
format |
Article in Journal/Newspaper |
author |
Ballantyne, C. K. Hall, A. M. Phillips, W. M. Binnie, S. Kubik, P.W. |
author_facet |
Ballantyne, C. K. Hall, A. M. Phillips, W. M. Binnie, S. Kubik, P.W. |
author_sort |
Ballantyne, C. K. |
title |
Age and significance of former low-altitude corrie glaciers on Hoy, Orkney Islands |
title_short |
Age and significance of former low-altitude corrie glaciers on Hoy, Orkney Islands |
title_full |
Age and significance of former low-altitude corrie glaciers on Hoy, Orkney Islands |
title_fullStr |
Age and significance of former low-altitude corrie glaciers on Hoy, Orkney Islands |
title_full_unstemmed |
Age and significance of former low-altitude corrie glaciers on Hoy, Orkney Islands |
title_sort |
age and significance of former low-altitude corrie glaciers on hoy, orkney islands |
publishDate |
2007 |
url |
https://risweb.st-andrews.ac.uk/portal/en/researchoutput/age-and-significance-of-former-lowaltitude-corrie-glaciers-on-hoy-orkney-islands(61369042-a61f-432f-9d23-55f49d15881d).html https://doi.org/10.1144/sjg43020107 http://www.scopus.com/inward/record.url?scp=36249021088&partnerID=8YFLogxK http://www.landforms.eu/orkney/Library/Ballantyne%20Hoy%20Paper%20Proof.pdf |
long_lat |
ENVELOPE(9.642,9.642,63.170,63.170) ENVELOPE(-125.746,-125.746,54.239,54.239) |
geographic |
Ela Loch Lomond |
geographic_facet |
Ela Loch Lomond |
genre |
Ice Sheet |
genre_facet |
Ice Sheet |
op_source |
Ballantyne , C K , Hall , A M , Phillips , W M , Binnie , S & Kubik , P W 2007 , ' Age and significance of former low-altitude corrie glaciers on Hoy, Orkney Islands ' , Scottish Journal of Geology , vol. 43 , no. 2 , pp. 107-114 . https://doi.org/10.1144/sjg43020107 |
op_rights |
info:eu-repo/semantics/restrictedAccess |
op_doi |
https://doi.org/10.1144/sjg43020107 |
container_title |
Scottish Journal of Geology |
container_volume |
43 |
container_issue |
2 |
container_start_page |
107 |
op_container_end_page |
114 |
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1766031414456745984 |