A Holocene record of snow-avalanche and flood activity reconstructed from a lacustrine sedimentary sequence in Oldevatnet, western Norway
Two lacustrine sediment cores from Oldevatnet in western Norway have been studied in order to produce a record of floods, mass-wasting events and glacier fluctuations during the last 7300 years. River floods, density currents and snow-avalanches have deposited distinct ‘event layers’ at the lake flo...
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Online Access: | http://dx.doi.org/10.1177/0959683610391316 http://journals.sagepub.com/doi/pdf/10.1177/0959683610391316 |
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crsagepubl:10.1177/0959683610391316 2024-09-15T18:07:53+00:00 A Holocene record of snow-avalanche and flood activity reconstructed from a lacustrine sedimentary sequence in Oldevatnet, western Norway Vasskog, Kristian Nesje, Atle Støren, Eivind Nagel Waldmann, Nicolas Chapron, Emmanuel Ariztegui, Daniel 2011 http://dx.doi.org/10.1177/0959683610391316 http://journals.sagepub.com/doi/pdf/10.1177/0959683610391316 en eng SAGE Publications http://journals.sagepub.com/page/policies/text-and-data-mining-license The Holocene volume 21, issue 4, page 597-614 ISSN 0959-6836 1477-0911 journal-article 2011 crsagepubl https://doi.org/10.1177/0959683610391316 2024-08-19T04:28:31Z Two lacustrine sediment cores from Oldevatnet in western Norway have been studied in order to produce a record of floods, mass-wasting events and glacier fluctuations during the last 7300 years. River floods, density currents and snow-avalanches have deposited distinct ‘event layers’ at the lake floor throughout this time interval. In this study, a novel approach has been applied to distinguish event layers from the continuous background sedimentation, using Rb/Sr-ratios from X-Ray Fluorescence data. Grain-size distribution and the sedimentological parameters ‘mean’ and ‘sorting’ were used to further infer the depositional processes behind each layer. Our data suggest a record dominated by snow-avalanches, with the largest activity occurring during the ‘Little Ice Age’ (LIA). This increase in snow-avalanche activity observed during the LIA was probably caused by a combination of generally increasing winter precipitation and the advance of local glaciers towards the steep valley sides. Several fluctuations in snow-avalanche activity are also recognized prior to the LIA. Proxies of glacial activity from the background sediments indicate a similar development as earlier palaeoclimatic reconstructions from the area. It differs from previous reconstructions, however, by suggesting a lower glacial activity in the period from 2200 to 1000 cal. yr BP. Article in Journal/Newspaper glacier SAGE Publications The Holocene 21 4 597 614 |
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English |
description |
Two lacustrine sediment cores from Oldevatnet in western Norway have been studied in order to produce a record of floods, mass-wasting events and glacier fluctuations during the last 7300 years. River floods, density currents and snow-avalanches have deposited distinct ‘event layers’ at the lake floor throughout this time interval. In this study, a novel approach has been applied to distinguish event layers from the continuous background sedimentation, using Rb/Sr-ratios from X-Ray Fluorescence data. Grain-size distribution and the sedimentological parameters ‘mean’ and ‘sorting’ were used to further infer the depositional processes behind each layer. Our data suggest a record dominated by snow-avalanches, with the largest activity occurring during the ‘Little Ice Age’ (LIA). This increase in snow-avalanche activity observed during the LIA was probably caused by a combination of generally increasing winter precipitation and the advance of local glaciers towards the steep valley sides. Several fluctuations in snow-avalanche activity are also recognized prior to the LIA. Proxies of glacial activity from the background sediments indicate a similar development as earlier palaeoclimatic reconstructions from the area. It differs from previous reconstructions, however, by suggesting a lower glacial activity in the period from 2200 to 1000 cal. yr BP. |
format |
Article in Journal/Newspaper |
author |
Vasskog, Kristian Nesje, Atle Støren, Eivind Nagel Waldmann, Nicolas Chapron, Emmanuel Ariztegui, Daniel |
spellingShingle |
Vasskog, Kristian Nesje, Atle Støren, Eivind Nagel Waldmann, Nicolas Chapron, Emmanuel Ariztegui, Daniel A Holocene record of snow-avalanche and flood activity reconstructed from a lacustrine sedimentary sequence in Oldevatnet, western Norway |
author_facet |
Vasskog, Kristian Nesje, Atle Støren, Eivind Nagel Waldmann, Nicolas Chapron, Emmanuel Ariztegui, Daniel |
author_sort |
Vasskog, Kristian |
title |
A Holocene record of snow-avalanche and flood activity reconstructed from a lacustrine sedimentary sequence in Oldevatnet, western Norway |
title_short |
A Holocene record of snow-avalanche and flood activity reconstructed from a lacustrine sedimentary sequence in Oldevatnet, western Norway |
title_full |
A Holocene record of snow-avalanche and flood activity reconstructed from a lacustrine sedimentary sequence in Oldevatnet, western Norway |
title_fullStr |
A Holocene record of snow-avalanche and flood activity reconstructed from a lacustrine sedimentary sequence in Oldevatnet, western Norway |
title_full_unstemmed |
A Holocene record of snow-avalanche and flood activity reconstructed from a lacustrine sedimentary sequence in Oldevatnet, western Norway |
title_sort |
holocene record of snow-avalanche and flood activity reconstructed from a lacustrine sedimentary sequence in oldevatnet, western norway |
publisher |
SAGE Publications |
publishDate |
2011 |
url |
http://dx.doi.org/10.1177/0959683610391316 http://journals.sagepub.com/doi/pdf/10.1177/0959683610391316 |
genre |
glacier |
genre_facet |
glacier |
op_source |
The Holocene volume 21, issue 4, page 597-614 ISSN 0959-6836 1477-0911 |
op_rights |
http://journals.sagepub.com/page/policies/text-and-data-mining-license |
op_doi |
https://doi.org/10.1177/0959683610391316 |
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The Holocene |
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21 |
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4 |
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597 |
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614 |
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1810445240268488704 |