Lateglacial rock slope failures in north-west Ireland : age, causes and implications
This research was supported by the NERC Cosmogenic Isotope Analysis Facility through an award for sample preparation and analysis (CIAF project 9046.0308) Nine postglacial quartzite rock slope failures (RSFs) in north-west Ireland were dated using cosmogenic 10Be. Weighted mean RSF ages range from 1...
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ftstandrewserep:oai:research-repository.st-andrews.ac.uk:10023/5840 2023-07-02T03:32:34+02:00 Lateglacial rock slope failures in north-west Ireland : age, causes and implications Ballantyne, Colin Wilson, Peter Schnabel, Christoph Xu, Sheng University of St Andrews. Geography & Sustainable Development 2014-11-28 14 application/pdf http://hdl.handle.net/10023/5840 https://doi.org/10.1002/jqs.2675 eng eng Journal of Quaternary Science Ballantyne , C , Wilson , P , Schnabel , C & Xu , S 2013 , ' Lateglacial rock slope failures in north-west Ireland : age, causes and implications ' , Journal of Quaternary Science , vol. 28 , no. 8 , pp. 789-802 . https://doi.org/10.1002/jqs.2675 0267-8179 PURE: 61444234 PURE UUID: 6cefb792-2aec-41eb-9ade-ea9e0ebe3af5 Scopus: 84890220011 http://hdl.handle.net/10023/5840 https://doi.org/10.1002/jqs.2675 Copyright © 2013 John Wiley & Sons, Ltd. This work is made available online in accordance with the publisher’s policies. This is the author created, accepted version manuscript following peer review and may differ slightly from the final published version. The final published version of this work is available at http://onlinelibrary.wiley.com/doi/10.1002/jqs.2675/abstract 10Be exposure dating palaeoseismicity paraglacial rock slope failure stress release GB Physical geography GB Journal article 2014 ftstandrewserep https://doi.org/10.1002/jqs.2675 2023-06-13T18:29:36Z This research was supported by the NERC Cosmogenic Isotope Analysis Facility through an award for sample preparation and analysis (CIAF project 9046.0308) Nine postglacial quartzite rock slope failures (RSFs) in north-west Ireland were dated using cosmogenic 10Be. Weighted mean RSF ages range from 17.7 ± 0.9 to 12.5 ± 0.7 ka or 16.6 ± 0.7 to 11.7 ± 0.5 ka, depending on assumed 10Be production rate. All dated RSFs occurred within ∼5000 years following ice-sheet deglaciation at ∼17.4ka (∼16.3 ka) and all but two occurred within 2000 years after deglaciation. The timing of RSFs rules out glacial ‘debuttressing’, permafrost degradation and enhanced deglacial cleft-water pressures as triggers of failure in most cases. We infer that paraglacial stress release and associated fracture propagation were critical in reducing rock masses to critical stability, although earthquakes caused by Lateglacial glacio-isostatic rebound and/or release of stored tectonic stresses may have triggered failure in some or all cases. In conjunction with data from related studies, our results imply that most undated RSFs outside the limit of Younger Dryas glaciation in the British Isles are of Lateglacial age, and that numerous Lateglacial RSFs occurred inside these limits, with subsequent removal of debris by glaciers. They support the view that paraglacial RSF activity in tectonically stable intraplate terrains was concentrated within a few millennia following deglaciation. Postprint Peer reviewed Article in Journal/Newspaper Ice Ice Sheet permafrost University of St Andrews: Digital Research Repository Journal of Quaternary Science 28 8 789 802 |
institution |
Open Polar |
collection |
University of St Andrews: Digital Research Repository |
op_collection_id |
ftstandrewserep |
language |
English |
topic |
10Be exposure dating palaeoseismicity paraglacial rock slope failure stress release GB Physical geography GB |
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10Be exposure dating palaeoseismicity paraglacial rock slope failure stress release GB Physical geography GB Ballantyne, Colin Wilson, Peter Schnabel, Christoph Xu, Sheng Lateglacial rock slope failures in north-west Ireland : age, causes and implications |
topic_facet |
10Be exposure dating palaeoseismicity paraglacial rock slope failure stress release GB Physical geography GB |
description |
This research was supported by the NERC Cosmogenic Isotope Analysis Facility through an award for sample preparation and analysis (CIAF project 9046.0308) Nine postglacial quartzite rock slope failures (RSFs) in north-west Ireland were dated using cosmogenic 10Be. Weighted mean RSF ages range from 17.7 ± 0.9 to 12.5 ± 0.7 ka or 16.6 ± 0.7 to 11.7 ± 0.5 ka, depending on assumed 10Be production rate. All dated RSFs occurred within ∼5000 years following ice-sheet deglaciation at ∼17.4ka (∼16.3 ka) and all but two occurred within 2000 years after deglaciation. The timing of RSFs rules out glacial ‘debuttressing’, permafrost degradation and enhanced deglacial cleft-water pressures as triggers of failure in most cases. We infer that paraglacial stress release and associated fracture propagation were critical in reducing rock masses to critical stability, although earthquakes caused by Lateglacial glacio-isostatic rebound and/or release of stored tectonic stresses may have triggered failure in some or all cases. In conjunction with data from related studies, our results imply that most undated RSFs outside the limit of Younger Dryas glaciation in the British Isles are of Lateglacial age, and that numerous Lateglacial RSFs occurred inside these limits, with subsequent removal of debris by glaciers. They support the view that paraglacial RSF activity in tectonically stable intraplate terrains was concentrated within a few millennia following deglaciation. Postprint Peer reviewed |
author2 |
University of St Andrews. Geography & Sustainable Development |
format |
Article in Journal/Newspaper |
author |
Ballantyne, Colin Wilson, Peter Schnabel, Christoph Xu, Sheng |
author_facet |
Ballantyne, Colin Wilson, Peter Schnabel, Christoph Xu, Sheng |
author_sort |
Ballantyne, Colin |
title |
Lateglacial rock slope failures in north-west Ireland : age, causes and implications |
title_short |
Lateglacial rock slope failures in north-west Ireland : age, causes and implications |
title_full |
Lateglacial rock slope failures in north-west Ireland : age, causes and implications |
title_fullStr |
Lateglacial rock slope failures in north-west Ireland : age, causes and implications |
title_full_unstemmed |
Lateglacial rock slope failures in north-west Ireland : age, causes and implications |
title_sort |
lateglacial rock slope failures in north-west ireland : age, causes and implications |
publishDate |
2014 |
url |
http://hdl.handle.net/10023/5840 https://doi.org/10.1002/jqs.2675 |
genre |
Ice Ice Sheet permafrost |
genre_facet |
Ice Ice Sheet permafrost |
op_relation |
Journal of Quaternary Science Ballantyne , C , Wilson , P , Schnabel , C & Xu , S 2013 , ' Lateglacial rock slope failures in north-west Ireland : age, causes and implications ' , Journal of Quaternary Science , vol. 28 , no. 8 , pp. 789-802 . https://doi.org/10.1002/jqs.2675 0267-8179 PURE: 61444234 PURE UUID: 6cefb792-2aec-41eb-9ade-ea9e0ebe3af5 Scopus: 84890220011 http://hdl.handle.net/10023/5840 https://doi.org/10.1002/jqs.2675 |
op_rights |
Copyright © 2013 John Wiley & Sons, Ltd. This work is made available online in accordance with the publisher’s policies. This is the author created, accepted version manuscript following peer review and may differ slightly from the final published version. The final published version of this work is available at http://onlinelibrary.wiley.com/doi/10.1002/jqs.2675/abstract |
op_doi |
https://doi.org/10.1002/jqs.2675 |
container_title |
Journal of Quaternary Science |
container_volume |
28 |
container_issue |
8 |
container_start_page |
789 |
op_container_end_page |
802 |
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1770272158324359168 |