Loading...
Please wait, while we are loading the content...
Similar Documents
Evidence for rapid paraglacial formation of rock glaciers in southern Norway from$ ^{10}$Be surface-exposure dating
| Content Provider | Scilit |
|---|---|
| Author | Linge, Henriette Nesje, Atle Matthews, John A. Fabel, Derek Xu, Sheng |
| Copyright Year | 2020 |
| Description | We evaluate the timing and environmental controls on past rock-glacier activity at Øyberget, upper Ottadalen, southern Norway, using in situ$ ^{10}$Be 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. |
| Related Links | https://www.cambridge.org/core/services/aop-cambridge-core/content/view/182E56FC678EFB71473FAC696E7FCFB8/S0033589420000101a.pdf/div-class-title-evidence-for-rapid-paraglacial-formation-of-rock-glaciers-in-southern-norway-from-span-class-sup-10-span-be-surface-exposure-dating-div.pdf |
| Ending Page | 70 |
| Page Count | 16 |
| Starting Page | 55 |
| ISSN | 00335894 |
| e-ISSN | 10960287 |
| DOI | 10.1017/qua.2020.10 |
| Journal | Quaternary Research |
| Volume Number | 97 |
| Language | English |
| Publisher | Cambridge University Press (CUP) |
| Publisher Date | 2020-04-16 |
| Access Restriction | Open |
| Subject Keyword | Quaternary Research Physical Geography exposure Dating Cosmogenic Nuclides Paraglacial Landforms |
| Content Type | Text |
| Resource Type | Article |
| Subject | Earth-Surface Processes Arts and Humanities |
