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...
Published in: | Quaternary Research |
---|---|
Main Authors: | , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Cambridge University Press
2020
|
Subjects: | |
Online Access: | http://eprints.gla.ac.uk/214508/ http://eprints.gla.ac.uk/214508/1/214508.pdf |
id |
ftuglasgow:oai:eprints.gla.ac.uk:214508 |
---|---|
record_format |
openpolar |
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 |
_version_ |
1766009873743478784 |