In situ $^{10}$Be exposure ages from southeastern Norway: implications for the geometry of the Weichselian Scandinavian ice sheet
As an initial attempt to constrain the geometry and history of the southern part of the Scandinavian ice sheet, in situ 10Be concentrations in bedrock samples have been measured from four sites in southeastern Norway. Among our results are a number of pre-Last Glacial Maximum (LGM) exposure ages. Be...
Published in: | Quaternary Science Reviews |
---|---|
Main Authors: | , , , , , |
Other Authors: | , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
HAL CCSD
2006
|
Subjects: | |
Online Access: | https://hal.in2p3.fr/in2p3-00068780 https://doi.org/10.1016/j.quascirev.2005.10.007 |
id |
ftunivnantes:oai:HAL:in2p3-00068780v1 |
---|---|
record_format |
openpolar |
spelling |
ftunivnantes:oai:HAL:in2p3-00068780v1 2023-05-15T16:40:02+02:00 In situ $^{10}$Be exposure ages from southeastern Norway: implications for the geometry of the Weichselian Scandinavian ice sheet Linge, H. Brook, E.J. Nesje, A. Raisbeck, G.M. Yiou, F. Clark, H. Centre de Spectrométrie Nucléaire et de Spectrométrie de Masse (CSNSM) Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS) 2006 https://hal.in2p3.fr/in2p3-00068780 https://doi.org/10.1016/j.quascirev.2005.10.007 en eng HAL CCSD Elsevier info:eu-repo/semantics/altIdentifier/doi/10.1016/j.quascirev.2005.10.007 in2p3-00068780 https://hal.in2p3.fr/in2p3-00068780 doi:10.1016/j.quascirev.2005.10.007 ISSN: 0277-3791 Quaternary Science Reviews https://hal.in2p3.fr/in2p3-00068780 Quaternary Science Reviews, 2006, 25, pp.1097-1109. ⟨10.1016/j.quascirev.2005.10.007⟩ [PHYS.PHYS.PHYS-GEO-PH]Physics [physics]/Physics [physics]/Geophysics [physics.geo-ph] info:eu-repo/semantics/article Journal articles 2006 ftunivnantes https://doi.org/10.1016/j.quascirev.2005.10.007 2023-03-08T00:11:37Z As an initial attempt to constrain the geometry and history of the southern part of the Scandinavian ice sheet, in situ 10Be concentrations in bedrock samples have been measured from four sites in southeastern Norway. Among our results are a number of pre-Last Glacial Maximum (LGM) exposure ages. Bedrock outcrops in high elevation blockfields typically give surface exposure ages older than 20 10Be ka, whereas glacially moulded bedrock surfaces at lower elevations yield surface exposure ages younger than 15 10Be ka. These results clearly indicate the preservation of surfaces and landforms predating the LGM. Most ice-sheet models predict a thick ice mass in southeastern Norway at the LGM. Pre-LGM 10Be ages either contradict the models, supporting geomorphological reconstructions of a thin LGM ice sheet, or indicate preservation of previously exposed surfaces beneath cold-based ice. In the latter case, models of 10Be production incorporating regional glacial chronology and periodic burial suggest that the surfaces with the highest 10Be concentrations may have existed for more than one million years. Article in Journal/Newspaper Ice Sheet Université de Nantes: HAL-UNIV-NANTES Norway Quaternary Science Reviews 25 9-10 1097 1109 |
institution |
Open Polar |
collection |
Université de Nantes: HAL-UNIV-NANTES |
op_collection_id |
ftunivnantes |
language |
English |
topic |
[PHYS.PHYS.PHYS-GEO-PH]Physics [physics]/Physics [physics]/Geophysics [physics.geo-ph] |
spellingShingle |
[PHYS.PHYS.PHYS-GEO-PH]Physics [physics]/Physics [physics]/Geophysics [physics.geo-ph] Linge, H. Brook, E.J. Nesje, A. Raisbeck, G.M. Yiou, F. Clark, H. In situ $^{10}$Be exposure ages from southeastern Norway: implications for the geometry of the Weichselian Scandinavian ice sheet |
topic_facet |
[PHYS.PHYS.PHYS-GEO-PH]Physics [physics]/Physics [physics]/Geophysics [physics.geo-ph] |
description |
As an initial attempt to constrain the geometry and history of the southern part of the Scandinavian ice sheet, in situ 10Be concentrations in bedrock samples have been measured from four sites in southeastern Norway. Among our results are a number of pre-Last Glacial Maximum (LGM) exposure ages. Bedrock outcrops in high elevation blockfields typically give surface exposure ages older than 20 10Be ka, whereas glacially moulded bedrock surfaces at lower elevations yield surface exposure ages younger than 15 10Be ka. These results clearly indicate the preservation of surfaces and landforms predating the LGM. Most ice-sheet models predict a thick ice mass in southeastern Norway at the LGM. Pre-LGM 10Be ages either contradict the models, supporting geomorphological reconstructions of a thin LGM ice sheet, or indicate preservation of previously exposed surfaces beneath cold-based ice. In the latter case, models of 10Be production incorporating regional glacial chronology and periodic burial suggest that the surfaces with the highest 10Be concentrations may have existed for more than one million years. |
author2 |
Centre de Spectrométrie Nucléaire et de Spectrométrie de Masse (CSNSM) Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS) |
format |
Article in Journal/Newspaper |
author |
Linge, H. Brook, E.J. Nesje, A. Raisbeck, G.M. Yiou, F. Clark, H. |
author_facet |
Linge, H. Brook, E.J. Nesje, A. Raisbeck, G.M. Yiou, F. Clark, H. |
author_sort |
Linge, H. |
title |
In situ $^{10}$Be exposure ages from southeastern Norway: implications for the geometry of the Weichselian Scandinavian ice sheet |
title_short |
In situ $^{10}$Be exposure ages from southeastern Norway: implications for the geometry of the Weichselian Scandinavian ice sheet |
title_full |
In situ $^{10}$Be exposure ages from southeastern Norway: implications for the geometry of the Weichselian Scandinavian ice sheet |
title_fullStr |
In situ $^{10}$Be exposure ages from southeastern Norway: implications for the geometry of the Weichselian Scandinavian ice sheet |
title_full_unstemmed |
In situ $^{10}$Be exposure ages from southeastern Norway: implications for the geometry of the Weichselian Scandinavian ice sheet |
title_sort |
in situ $^{10}$be exposure ages from southeastern norway: implications for the geometry of the weichselian scandinavian ice sheet |
publisher |
HAL CCSD |
publishDate |
2006 |
url |
https://hal.in2p3.fr/in2p3-00068780 https://doi.org/10.1016/j.quascirev.2005.10.007 |
geographic |
Norway |
geographic_facet |
Norway |
genre |
Ice Sheet |
genre_facet |
Ice Sheet |
op_source |
ISSN: 0277-3791 Quaternary Science Reviews https://hal.in2p3.fr/in2p3-00068780 Quaternary Science Reviews, 2006, 25, pp.1097-1109. ⟨10.1016/j.quascirev.2005.10.007⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.quascirev.2005.10.007 in2p3-00068780 https://hal.in2p3.fr/in2p3-00068780 doi:10.1016/j.quascirev.2005.10.007 |
op_doi |
https://doi.org/10.1016/j.quascirev.2005.10.007 |
container_title |
Quaternary Science Reviews |
container_volume |
25 |
container_issue |
9-10 |
container_start_page |
1097 |
op_container_end_page |
1109 |
_version_ |
1766030398261821440 |