dc.contributor.author | Linge, Henriette | |
dc.contributor.author | Nesje, Atle | |
dc.contributor.author | Matthews, John A. | |
dc.contributor.author | Fabel, Derek | |
dc.contributor.author | Xu, Sheng | |
dc.date.accessioned | 2021-04-29T13:35:16Z | |
dc.date.available | 2021-04-29T13:35:16Z | |
dc.date.created | 2020-11-21T20:21:03Z | |
dc.date.issued | 2020-04-16 | |
dc.identifier.issn | 0033-5894 | |
dc.identifier.uri | https://hdl.handle.net/11250/2740426 | |
dc.description.abstract | 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. | en_US |
dc.language.iso | eng | en_US |
dc.publisher | Cambridge University Press | en_US |
dc.rights | Navngivelse 4.0 Internasjonal | * |
dc.rights.uri | http://creativecommons.org/licenses/by/4.0/deed.no | * |
dc.title | Evidence for rapid paraglacial formation of rock glaciers in southern Norway from 10Be surface-exposure dating | en_US |
dc.type | Journal article | en_US |
dc.type | Peer reviewed | en_US |
dc.description.version | publishedVersion | en_US |
dc.rights.holder | Copyright University of Washington | en_US |
cristin.ispublished | true | |
cristin.fulltext | original | |
cristin.qualitycode | 1 | |
dc.identifier.doi | 10.1017/qua.2020.10 | |
dc.identifier.cristin | 1850703 | |
dc.source.journal | Quaternary Research | en_US |
dc.source.pagenumber | 55-70 | en_US |
dc.identifier.citation | Quaternary Research. 2020, 97, 55 - 70 | en_US |
dc.source.volume | 97 | en_US |