Evidence for rapid paraglacial formation of rock glaciers in southern Norway from 10Be surface-exposure dating

We evaluate the timing and environmental controls on past rock-glacier activity at Øyberget, upper Ottadalen, southern Norway, using in situ 10Be surface-exposure dating on (1) boulders belonging to relict rock-glacier lobes at c. 530 m asl, (2) bedrock and boulder surfaces at the Øyberget summit (c...

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Published in:Quaternary Research
Main Authors: Linge, Henriette, Nesje, Atle, Matthews, John A., Fabel, Derek, Xu, Sheng
Format: Article in Journal/Newspaper
Language:English
Published: Cambridge University Press 2020
Subjects:
Ice
Online Access:http://eprints.gla.ac.uk/214508/
http://eprints.gla.ac.uk/214508/1/214508.pdf
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spelling ftuglasgow:oai:eprints.gla.ac.uk:214508 2023-05-15T16:21:54+02:00 Evidence for rapid paraglacial formation of rock glaciers in southern Norway from 10Be surface-exposure dating Linge, Henriette Nesje, Atle Matthews, John A. Fabel, Derek Xu, Sheng 2020-09 text http://eprints.gla.ac.uk/214508/ http://eprints.gla.ac.uk/214508/1/214508.pdf en eng Cambridge University Press http://eprints.gla.ac.uk/214508/1/214508.pdf Linge, H., Nesje, A., Matthews, J. A., Fabel, D. <http://eprints.gla.ac.uk/view/author/5585.html> and Xu, S. <http://eprints.gla.ac.uk/view/author/12708.html> (2020) Evidence for rapid paraglacial formation of rock glaciers in southern Norway from 10Be surface-exposure dating. Quaternary Research <http://eprints.gla.ac.uk/view/journal_volume/Quaternary_Research.html>, 97, pp. 55-70. (doi:10.1017/qua.2020.10 <http://dx.doi.org/10.1017/qua.2020.10>) cc_by_4 CC-BY Articles PeerReviewed 2020 ftuglasgow https://doi.org/10.1017/qua.2020.10 2020-12-10T23:09:26Z We evaluate the timing and environmental controls on past rock-glacier activity at Øyberget, upper Ottadalen, southern Norway, using in situ 10Be surface-exposure dating on (1) boulders belonging to relict rock-glacier lobes at c. 530 m asl, (2) bedrock and boulder surfaces at the Øyberget summit (c. 1200 m asl), and (3) bedrock at an up-valley site (c. 615 m asl). We find that the rock-glacier lobes became inactive around 11.1 ± 1.2 ka, coeval with the timing of summit deglaciation (11.2 ± 0.7 ka). This is slightly older than previously published Schmidt-hammer surface-exposure ages. The timing does not match known climatic conditions promoting rock-glacier formation in the early Holocene; hence we infer that lobe formation resulted from enhanced debris supply and burial of residual ice during and soon after deglaciation. The results demonstrate that rock glaciers may form over a relatively short period of time (hundreds rather than thousands of years) under non-permafrost conditions and possibly indicate a paraglacial type of process. Article in Journal/Newspaper glacier Ice permafrost University of Glasgow: Enlighten - Publications Norway Øyberget ENVELOPE(9.904,9.904,63.167,63.167) Quaternary Research 97 55 70
institution Open Polar
collection University of Glasgow: Enlighten - Publications
op_collection_id ftuglasgow
language English
description We evaluate the timing and environmental controls on past rock-glacier activity at Øyberget, upper Ottadalen, southern Norway, using in situ 10Be surface-exposure dating on (1) boulders belonging to relict rock-glacier lobes at c. 530 m asl, (2) bedrock and boulder surfaces at the Øyberget summit (c. 1200 m asl), and (3) bedrock at an up-valley site (c. 615 m asl). We find that the rock-glacier lobes became inactive around 11.1 ± 1.2 ka, coeval with the timing of summit deglaciation (11.2 ± 0.7 ka). This is slightly older than previously published Schmidt-hammer surface-exposure ages. The timing does not match known climatic conditions promoting rock-glacier formation in the early Holocene; hence we infer that lobe formation resulted from enhanced debris supply and burial of residual ice during and soon after deglaciation. The results demonstrate that rock glaciers may form over a relatively short period of time (hundreds rather than thousands of years) under non-permafrost conditions and possibly indicate a paraglacial type of process.
format Article in Journal/Newspaper
author Linge, Henriette
Nesje, Atle
Matthews, John A.
Fabel, Derek
Xu, Sheng
spellingShingle Linge, Henriette
Nesje, Atle
Matthews, John A.
Fabel, Derek
Xu, Sheng
Evidence for rapid paraglacial formation of rock glaciers in southern Norway from 10Be surface-exposure dating
author_facet Linge, Henriette
Nesje, Atle
Matthews, John A.
Fabel, Derek
Xu, Sheng
author_sort Linge, Henriette
title Evidence for rapid paraglacial formation of rock glaciers in southern Norway from 10Be surface-exposure dating
title_short Evidence for rapid paraglacial formation of rock glaciers in southern Norway from 10Be surface-exposure dating
title_full Evidence for rapid paraglacial formation of rock glaciers in southern Norway from 10Be surface-exposure dating
title_fullStr Evidence for rapid paraglacial formation of rock glaciers in southern Norway from 10Be surface-exposure dating
title_full_unstemmed Evidence for rapid paraglacial formation of rock glaciers in southern Norway from 10Be surface-exposure dating
title_sort evidence for rapid paraglacial formation of rock glaciers in southern norway from 10be surface-exposure dating
publisher Cambridge University Press
publishDate 2020
url http://eprints.gla.ac.uk/214508/
http://eprints.gla.ac.uk/214508/1/214508.pdf
long_lat ENVELOPE(9.904,9.904,63.167,63.167)
geographic Norway
Øyberget
geographic_facet Norway
Øyberget
genre glacier
Ice
permafrost
genre_facet glacier
Ice
permafrost
op_relation http://eprints.gla.ac.uk/214508/1/214508.pdf
Linge, H., Nesje, A., Matthews, J. A., Fabel, D. <http://eprints.gla.ac.uk/view/author/5585.html> and Xu, S. <http://eprints.gla.ac.uk/view/author/12708.html> (2020) Evidence for rapid paraglacial formation of rock glaciers in southern Norway from 10Be surface-exposure dating. Quaternary Research <http://eprints.gla.ac.uk/view/journal_volume/Quaternary_Research.html>, 97, pp. 55-70. (doi:10.1017/qua.2020.10 <http://dx.doi.org/10.1017/qua.2020.10>)
op_rights cc_by_4
op_rightsnorm CC-BY
op_doi https://doi.org/10.1017/qua.2020.10
container_title Quaternary Research
container_volume 97
container_start_page 55
op_container_end_page 70
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