Ice sheet erosion patterns in valley systems in northern Sweden investigated using cosmogenic nuclides
Abstract Erosion patterns associated with glaciation of trunk and hanging valley systems in northern Sweden were investigated using cosmogenic nuclide 10 Be apparent exposure ages and inferred nuclide inheritance. Sequences of samples taken across valleys known to have been covered repeatedly by the...
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crwiley:10.1002/esp.1261 2024-04-28T08:18:43+00:00 Ice sheet erosion patterns in valley systems in northern Sweden investigated using cosmogenic nuclides Li, Yingkui Harbor, Jon Stroeven, Arjen P. Fabel, Derek Kleman, Johan Fink, David Caffee, Marc Elmore, David 2005 http://dx.doi.org/10.1002/esp.1261 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fesp.1261 https://onlinelibrary.wiley.com/doi/pdf/10.1002/esp.1261 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Earth Surface Processes and Landforms volume 30, issue 8, page 1039-1049 ISSN 0197-9337 1096-9837 Earth and Planetary Sciences (miscellaneous) Earth-Surface Processes Geography, Planning and Development journal-article 2005 crwiley https://doi.org/10.1002/esp.1261 2024-04-02T08:47:00Z Abstract Erosion patterns associated with glaciation of trunk and hanging valley systems in northern Sweden were investigated using cosmogenic nuclide 10 Be apparent exposure ages and inferred nuclide inheritance. Sequences of samples taken across valleys known to have been covered repeatedly by the Fennoscandian ice sheet revealed two primary patterns of erosion. In Vávlávágge the exposure age pattern is consistent with >2 m of glacial erosion during the last glacial cycle along the entire profile. At Rávtasvággi, Dievssavággi and Alisvággi, exposure ages in the valley bottom contrast with apparent exposure ages two to four times older on the valley sides. The older ages on the valley sides reflect cosmogenic nuclide inheritance due to limited (<2 m) bedrock erosion of the valley sides during the last glacial cycle. The pattern and scale of erosion in these valleys indicates that glacial valley formation is a result of multiple glacial cycles rather than the result of topographic modification during a single glacial cycle. Initial data comparing hanging valley and trunk valley sites do not show distinct differences in apparent exposure ages. Slightly older ages for samples from hanging valley bottoms may suggest nuclide inheritance indicating lower erosion than in trunk valley bottoms, as would be expected given the marked topographic step between hanging and trunk valleys. Although quantifying the amount of erosion depends on the assumed cosmogenic nuclide inheritance prior to the onset of erosion, the pattern of erosion is independent of this. Hence the observed pattern of cosmogenic nuclide concentrations provides constraints on spatial patterns of erosion and helps to refine understanding of the timing and extent of landform modification by glaciation. Copyright © 2005 John Wiley & Sons, Ltd. Article in Journal/Newspaper Fennoscandian Ice Sheet Northern Sweden Wiley Online Library Earth Surface Processes and Landforms 30 8 1039 1049 |
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Open Polar |
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Wiley Online Library |
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crwiley |
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English |
topic |
Earth and Planetary Sciences (miscellaneous) Earth-Surface Processes Geography, Planning and Development |
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Earth and Planetary Sciences (miscellaneous) Earth-Surface Processes Geography, Planning and Development Li, Yingkui Harbor, Jon Stroeven, Arjen P. Fabel, Derek Kleman, Johan Fink, David Caffee, Marc Elmore, David Ice sheet erosion patterns in valley systems in northern Sweden investigated using cosmogenic nuclides |
topic_facet |
Earth and Planetary Sciences (miscellaneous) Earth-Surface Processes Geography, Planning and Development |
description |
Abstract Erosion patterns associated with glaciation of trunk and hanging valley systems in northern Sweden were investigated using cosmogenic nuclide 10 Be apparent exposure ages and inferred nuclide inheritance. Sequences of samples taken across valleys known to have been covered repeatedly by the Fennoscandian ice sheet revealed two primary patterns of erosion. In Vávlávágge the exposure age pattern is consistent with >2 m of glacial erosion during the last glacial cycle along the entire profile. At Rávtasvággi, Dievssavággi and Alisvággi, exposure ages in the valley bottom contrast with apparent exposure ages two to four times older on the valley sides. The older ages on the valley sides reflect cosmogenic nuclide inheritance due to limited (<2 m) bedrock erosion of the valley sides during the last glacial cycle. The pattern and scale of erosion in these valleys indicates that glacial valley formation is a result of multiple glacial cycles rather than the result of topographic modification during a single glacial cycle. Initial data comparing hanging valley and trunk valley sites do not show distinct differences in apparent exposure ages. Slightly older ages for samples from hanging valley bottoms may suggest nuclide inheritance indicating lower erosion than in trunk valley bottoms, as would be expected given the marked topographic step between hanging and trunk valleys. Although quantifying the amount of erosion depends on the assumed cosmogenic nuclide inheritance prior to the onset of erosion, the pattern of erosion is independent of this. Hence the observed pattern of cosmogenic nuclide concentrations provides constraints on spatial patterns of erosion and helps to refine understanding of the timing and extent of landform modification by glaciation. Copyright © 2005 John Wiley & Sons, Ltd. |
format |
Article in Journal/Newspaper |
author |
Li, Yingkui Harbor, Jon Stroeven, Arjen P. Fabel, Derek Kleman, Johan Fink, David Caffee, Marc Elmore, David |
author_facet |
Li, Yingkui Harbor, Jon Stroeven, Arjen P. Fabel, Derek Kleman, Johan Fink, David Caffee, Marc Elmore, David |
author_sort |
Li, Yingkui |
title |
Ice sheet erosion patterns in valley systems in northern Sweden investigated using cosmogenic nuclides |
title_short |
Ice sheet erosion patterns in valley systems in northern Sweden investigated using cosmogenic nuclides |
title_full |
Ice sheet erosion patterns in valley systems in northern Sweden investigated using cosmogenic nuclides |
title_fullStr |
Ice sheet erosion patterns in valley systems in northern Sweden investigated using cosmogenic nuclides |
title_full_unstemmed |
Ice sheet erosion patterns in valley systems in northern Sweden investigated using cosmogenic nuclides |
title_sort |
ice sheet erosion patterns in valley systems in northern sweden investigated using cosmogenic nuclides |
publisher |
Wiley |
publishDate |
2005 |
url |
http://dx.doi.org/10.1002/esp.1261 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fesp.1261 https://onlinelibrary.wiley.com/doi/pdf/10.1002/esp.1261 |
genre |
Fennoscandian Ice Sheet Northern Sweden |
genre_facet |
Fennoscandian Ice Sheet Northern Sweden |
op_source |
Earth Surface Processes and Landforms volume 30, issue 8, page 1039-1049 ISSN 0197-9337 1096-9837 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1002/esp.1261 |
container_title |
Earth Surface Processes and Landforms |
container_volume |
30 |
container_issue |
8 |
container_start_page |
1039 |
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1049 |
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1797582566163742720 |