Paraglacial rock-slope failure following deglaciation in western Norway
© 2020 Springer-Verlag. The paraglacial framework describes the geomorphological response to glaciation and deglaciation, whereby non-renewable, metastable, glacially-conditioned sediment sources are progressively released by a range of nonglacial processes. These include slope failures that directl...
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ftunivhertford:oai:uhra.herts.ac.uk:2299/23263 2023-05-15T16:37:45+02:00 Paraglacial rock-slope failure following deglaciation in western Norway Curry, Alastair Beylich, Achim Department of Biological and Environmental Sciences School of Life and Medical Sciences 2022-10-05 http://hdl.handle.net/2299/23263 eng eng Springer Landscapes and Landforms of Norway Springer Book Series World Geomorphological Landscapes Curry , A 2020 , Paraglacial rock-slope failure following deglaciation in western Norway . in A Beylich (ed.) , Landscapes and Landforms of Norway . Springer Book Series World Geomorphological Landscapes , Springer , pp. 97-130 . https://doi.org/10.1007/978-3-030-52563-7_5 978-3-030-52562-0 978-3-030-52563-7 PURE: 14946323 PURE UUID: 13425433-35da-4568-91fd-52eac2815242 http://hdl.handle.net/2299/23263 paraglacial rock-slope failure glaciation deglaciation rockfall rock avalanche stress-release Earth-Surface Processes 1479 ftunivhertford https://doi.org/10.1007/978-3-030-52563-7_5 2021-09-30T19:49:43Z © 2020 Springer-Verlag. The paraglacial framework describes the geomorphological response to glaciation and deglaciation, whereby non-renewable, metastable, glacially-conditioned sediment sources are progressively released by a range of nonglacial processes. These include slope failures that directly modify the bedrock topography of mountain landscapes. This chapter synthesises recent research on the paraglacial evolution of western Norway’s mountain rock-slopes, and evaluates the importance of glaciation, deglaciation, and associated climatic and non-climatic processes. Following an introduction to the concept of paraglacial landscape change, current understanding of rock-slope responses to deglaciation are outlined, focussing on the spatial distribution, timing, duration and triggers for rock-slope failure (RSF). Preliminary analysis of an inventory of published ages for 49 prehistoric RSFs indicates that the great majority of activity occurred in the Late Weichselian / Early Holocene transition (~13-9 ka), within 2 ka of deglaciation. Subsequent RSFs were much smaller, though event frequency increased again at 8-7 ka and 5-4 ka BP. The majority of RSFs were not directly triggered by deglaciation (debuttressing) but were preconditioned for more than 1000 years after ice withdrawal, until slopes collapsed. It is proposed that the primary causes of failure within 2 ka of ice retreat were stress redistribution, subcritical fracture propagation, and possibly seismic activity. Earthquakes may have triggered renewed RSF in the Late Holocene, though it seems likely that permafrost degradation and water supply were locally important. Priority avenues for further research are briefly identified. Peer reviewed Other/Unknown Material Ice permafrost University of Hertfordshire: UH Research Archive Norway 97 130 |
institution |
Open Polar |
collection |
University of Hertfordshire: UH Research Archive |
op_collection_id |
ftunivhertford |
language |
English |
topic |
paraglacial rock-slope failure glaciation deglaciation rockfall rock avalanche stress-release Earth-Surface Processes |
spellingShingle |
paraglacial rock-slope failure glaciation deglaciation rockfall rock avalanche stress-release Earth-Surface Processes Curry, Alastair Paraglacial rock-slope failure following deglaciation in western Norway |
topic_facet |
paraglacial rock-slope failure glaciation deglaciation rockfall rock avalanche stress-release Earth-Surface Processes |
description |
© 2020 Springer-Verlag. The paraglacial framework describes the geomorphological response to glaciation and deglaciation, whereby non-renewable, metastable, glacially-conditioned sediment sources are progressively released by a range of nonglacial processes. These include slope failures that directly modify the bedrock topography of mountain landscapes. This chapter synthesises recent research on the paraglacial evolution of western Norway’s mountain rock-slopes, and evaluates the importance of glaciation, deglaciation, and associated climatic and non-climatic processes. Following an introduction to the concept of paraglacial landscape change, current understanding of rock-slope responses to deglaciation are outlined, focussing on the spatial distribution, timing, duration and triggers for rock-slope failure (RSF). Preliminary analysis of an inventory of published ages for 49 prehistoric RSFs indicates that the great majority of activity occurred in the Late Weichselian / Early Holocene transition (~13-9 ka), within 2 ka of deglaciation. Subsequent RSFs were much smaller, though event frequency increased again at 8-7 ka and 5-4 ka BP. The majority of RSFs were not directly triggered by deglaciation (debuttressing) but were preconditioned for more than 1000 years after ice withdrawal, until slopes collapsed. It is proposed that the primary causes of failure within 2 ka of ice retreat were stress redistribution, subcritical fracture propagation, and possibly seismic activity. Earthquakes may have triggered renewed RSF in the Late Holocene, though it seems likely that permafrost degradation and water supply were locally important. Priority avenues for further research are briefly identified. Peer reviewed |
author2 |
Beylich, Achim Department of Biological and Environmental Sciences School of Life and Medical Sciences |
author |
Curry, Alastair |
author_facet |
Curry, Alastair |
author_sort |
Curry, Alastair |
title |
Paraglacial rock-slope failure following deglaciation in western Norway |
title_short |
Paraglacial rock-slope failure following deglaciation in western Norway |
title_full |
Paraglacial rock-slope failure following deglaciation in western Norway |
title_fullStr |
Paraglacial rock-slope failure following deglaciation in western Norway |
title_full_unstemmed |
Paraglacial rock-slope failure following deglaciation in western Norway |
title_sort |
paraglacial rock-slope failure following deglaciation in western norway |
publisher |
Springer |
publishDate |
1479 |
url |
http://hdl.handle.net/2299/23263 |
geographic |
Norway |
geographic_facet |
Norway |
genre |
Ice permafrost |
genre_facet |
Ice permafrost |
op_relation |
Landscapes and Landforms of Norway Springer Book Series World Geomorphological Landscapes Curry , A 2020 , Paraglacial rock-slope failure following deglaciation in western Norway . in A Beylich (ed.) , Landscapes and Landforms of Norway . Springer Book Series World Geomorphological Landscapes , Springer , pp. 97-130 . https://doi.org/10.1007/978-3-030-52563-7_5 978-3-030-52562-0 978-3-030-52563-7 PURE: 14946323 PURE UUID: 13425433-35da-4568-91fd-52eac2815242 http://hdl.handle.net/2299/23263 |
op_doi |
https://doi.org/10.1007/978-3-030-52563-7_5 |
container_start_page |
97 |
op_container_end_page |
130 |
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1766028055299489792 |