Multiple rock-slope failures from Mannen in Romsdal Valley, western Norway, revealed from Quaternary geological mapping and 10 Be exposure dating
Oversteepened valley walls in western Norway have high recurrences of Holocene rock-slope failure activity causing significant risk to communities and infrastructure. Deposits from six to nine catastrophic rock-slope failure (CRSF) events are preserved at the base of the Mannen rock-slope instabilit...
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ftdatacite:10.25384/sage.c.4235549 2023-05-15T17:57:27+02:00 Multiple rock-slope failures from Mannen in Romsdal Valley, western Norway, revealed from Quaternary geological mapping and 10 Be exposure dating Hilger, Paula Hermanns, Reginald L Gosse, John C Jacobs, Benjamin Etzelmüller, Bernd Krautblatter, Michael 2018 https://dx.doi.org/10.25384/sage.c.4235549 https://figshare.com/collections/Multiple_rock-slope_failures_from_Mannen_in_Romsdal_Valley_western_Norway_revealed_from_Quaternary_geological_mapping_and_sup_10_sup_Be_exposure_dating/4235549 unknown Figshare https://dx.doi.org/10.1177/0959683618798165 CC BY 4.0 https://creativecommons.org/licenses/by/4.0 CC-BY Geography History Collection article 2018 ftdatacite https://doi.org/10.25384/sage.c.4235549 https://doi.org/10.1177/0959683618798165 2021-11-05T12:55:41Z Oversteepened valley walls in western Norway have high recurrences of Holocene rock-slope failure activity causing significant risk to communities and infrastructure. Deposits from six to nine catastrophic rock-slope failure (CRSF) events are preserved at the base of the Mannen rock-slope instability in the Romsdal Valley, western Norway. The timing of these CRSF events was determined by terrestrial cosmogenic nuclide dating and relative chronology due to mapping Quaternary deposits. The stratigraphical chronology indicates that three of the CRSF events occurred between 12 and 10 ka, during regional deglaciation. Congruent with previous investigations, these events are attributed to the debuttressing effect experienced by steep slopes following deglaciation, during a period of paraglacial relaxation. The remaining three to six CRSF events cluster at 4.9 ± 0.6 ka (based on 10 cosmogenic 10 Be samples from boulders). CRSF events during this later period are ascribed to climatic changes at the end of the Holocene thermal optimum, including increased precipitation rates, high air temperatures and the associated degradation of permafrost in rock-slope faces. Geomorphological mapping and sedimentological analyses further permit the contextualisation of these deposits within the overall sequence of post-glacial fjord-valley infilling. In the light of contemporary climate change, the relationship between CRSF frequency, precipitation, air temperature and permafrost degradation may be of interest to others working or operating in comparable settings. Article in Journal/Newspaper permafrost DataCite Metadata Store (German National Library of Science and Technology) Mannen ENVELOPE(13.520,13.520,68.204,68.204) Norway |
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Open Polar |
collection |
DataCite Metadata Store (German National Library of Science and Technology) |
op_collection_id |
ftdatacite |
language |
unknown |
topic |
Geography History |
spellingShingle |
Geography History Hilger, Paula Hermanns, Reginald L Gosse, John C Jacobs, Benjamin Etzelmüller, Bernd Krautblatter, Michael Multiple rock-slope failures from Mannen in Romsdal Valley, western Norway, revealed from Quaternary geological mapping and 10 Be exposure dating |
topic_facet |
Geography History |
description |
Oversteepened valley walls in western Norway have high recurrences of Holocene rock-slope failure activity causing significant risk to communities and infrastructure. Deposits from six to nine catastrophic rock-slope failure (CRSF) events are preserved at the base of the Mannen rock-slope instability in the Romsdal Valley, western Norway. The timing of these CRSF events was determined by terrestrial cosmogenic nuclide dating and relative chronology due to mapping Quaternary deposits. The stratigraphical chronology indicates that three of the CRSF events occurred between 12 and 10 ka, during regional deglaciation. Congruent with previous investigations, these events are attributed to the debuttressing effect experienced by steep slopes following deglaciation, during a period of paraglacial relaxation. The remaining three to six CRSF events cluster at 4.9 ± 0.6 ka (based on 10 cosmogenic 10 Be samples from boulders). CRSF events during this later period are ascribed to climatic changes at the end of the Holocene thermal optimum, including increased precipitation rates, high air temperatures and the associated degradation of permafrost in rock-slope faces. Geomorphological mapping and sedimentological analyses further permit the contextualisation of these deposits within the overall sequence of post-glacial fjord-valley infilling. In the light of contemporary climate change, the relationship between CRSF frequency, precipitation, air temperature and permafrost degradation may be of interest to others working or operating in comparable settings. |
format |
Article in Journal/Newspaper |
author |
Hilger, Paula Hermanns, Reginald L Gosse, John C Jacobs, Benjamin Etzelmüller, Bernd Krautblatter, Michael |
author_facet |
Hilger, Paula Hermanns, Reginald L Gosse, John C Jacobs, Benjamin Etzelmüller, Bernd Krautblatter, Michael |
author_sort |
Hilger, Paula |
title |
Multiple rock-slope failures from Mannen in Romsdal Valley, western Norway, revealed from Quaternary geological mapping and 10 Be exposure dating |
title_short |
Multiple rock-slope failures from Mannen in Romsdal Valley, western Norway, revealed from Quaternary geological mapping and 10 Be exposure dating |
title_full |
Multiple rock-slope failures from Mannen in Romsdal Valley, western Norway, revealed from Quaternary geological mapping and 10 Be exposure dating |
title_fullStr |
Multiple rock-slope failures from Mannen in Romsdal Valley, western Norway, revealed from Quaternary geological mapping and 10 Be exposure dating |
title_full_unstemmed |
Multiple rock-slope failures from Mannen in Romsdal Valley, western Norway, revealed from Quaternary geological mapping and 10 Be exposure dating |
title_sort |
multiple rock-slope failures from mannen in romsdal valley, western norway, revealed from quaternary geological mapping and 10 be exposure dating |
publisher |
Figshare |
publishDate |
2018 |
url |
https://dx.doi.org/10.25384/sage.c.4235549 https://figshare.com/collections/Multiple_rock-slope_failures_from_Mannen_in_Romsdal_Valley_western_Norway_revealed_from_Quaternary_geological_mapping_and_sup_10_sup_Be_exposure_dating/4235549 |
long_lat |
ENVELOPE(13.520,13.520,68.204,68.204) |
geographic |
Mannen Norway |
geographic_facet |
Mannen Norway |
genre |
permafrost |
genre_facet |
permafrost |
op_relation |
https://dx.doi.org/10.1177/0959683618798165 |
op_rights |
CC BY 4.0 https://creativecommons.org/licenses/by/4.0 |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.25384/sage.c.4235549 https://doi.org/10.1177/0959683618798165 |
_version_ |
1766165876668628992 |