Limited glacial erosion during the last glaciation in mid-latitude cirques (Retezat Mts, Southern Carpathians, Romania)
International audience The studied dataset from the Southern Carpathians permitted the quantification of a considerable amount of inherited 10 Be in the glacial boulders and bedrock samples in the cirque area. The samples from the glacial phases of largest extension display no signs of significant i...
Published in: | Geomorphology |
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Main Authors: | , , , , |
Other Authors: | , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
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HAL CCSD
2021
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Online Access: | https://hal.archives-ouvertes.fr/hal-03204190 https://hal.archives-ouvertes.fr/hal-03204190/document https://hal.archives-ouvertes.fr/hal-03204190/file/1-s2.0-S0169555X21001276-main.pdf https://doi.org/10.1016/j.geomorph.2021.107719 |
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Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) |
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language |
English |
topic |
[SDU.STU.TE]Sciences of the Universe [physics]/Earth Sciences/Tectonics [SDU.STU.GM]Sciences of the Universe [physics]/Earth Sciences/Geomorphology [SDE.MCG]Environmental Sciences/Global Changes [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment |
spellingShingle |
[SDU.STU.TE]Sciences of the Universe [physics]/Earth Sciences/Tectonics [SDU.STU.GM]Sciences of the Universe [physics]/Earth Sciences/Geomorphology [SDE.MCG]Environmental Sciences/Global Changes [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment Ruszkiczay-Rüdiger, Zsófia Kern, Zoltán Urdea, Petru Madarász, Balázs Braucher, Régis Limited glacial erosion during the last glaciation in mid-latitude cirques (Retezat Mts, Southern Carpathians, Romania) |
topic_facet |
[SDU.STU.TE]Sciences of the Universe [physics]/Earth Sciences/Tectonics [SDU.STU.GM]Sciences of the Universe [physics]/Earth Sciences/Geomorphology [SDE.MCG]Environmental Sciences/Global Changes [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment |
description |
International audience The studied dataset from the Southern Carpathians permitted the quantification of a considerable amount of inherited 10 Be in the glacial boulders and bedrock samples in the cirque area. The samples from the glacial phases of largest extension display no signs of significant inheritance, and enabled the establishment of a deglaciation chronology in the southern valleys of the Retezat Mts. The timing of the maximum glacier extent (20.6 +0.8 / −1.3 ka) coincided with the Last Glacial Maximum, which was followed by five deglaciation phases during the Lateglacial having partly overlapping ages due to fast glacier retreat (at 18.4 +0.7 / −1.1 ka; 16.9 ± 0.9 ka, 15.8 +0.9 / −0.6 ka, 15.6 +0.8 / −0.8 ka and 14.4 ± 0.5 ka) but could be distinguished by the position of their terminal moraines. The currently available geochronological data do not support the assumption of any major glacial re-advance after Greenland Stadial 2.1a in the Retezat Mts. Given the lack of independent geochronological data, the amount of inherited cosmogenic nuclides is tentatively estimated by accepting the youngest cosmic ray exposure age(s) as the time of moraine deposition and abandonment by the glacier. The calculated amount of inherited 10 Be enables the estimation of a glacial erosion depth of 1.1-1.6 m for the bedrock samples and 1.4-1.8 m for the glacial boulders. The duration of the ice-covered and ice-free periods was adjusted in relation to independent paleoenvironmental and paleoclimatological data. The glacial denudation rate in the cirques was estimated at 19-28 mm/kyr and 24-33 mm/kyr for bedrock and boulders, respectively. The limited glacial erosion in the cirques during the last glaciation is attributed to frozen-bed conditions with no considerable glacial deepening during the more extended glacial phases. Only when warming led to the retreat of the glaciers to their cirques, they become steeper and shift to being warm-based and thus more erosive. However, the limited time spent under these conditions ... |
author2 |
Institute for Geological and Geochemical Research, Research Centre for Astronomy and Earth Sciences Centre européen de recherche et d'enseignement des géosciences de l'environnement (CEREGE) Institut de Recherche pour le Développement (IRD)-Aix Marseille Université (AMU)-Collège de France (CdF (institution))-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE) National Research, Development and Innovation Office of Hungary124807119039European CommissionGINOP-2.3.2-15-2016-00009Centre National de la Recherche Scientifique (CNRS)French National Research Agency (ANR)IRD |
format |
Article in Journal/Newspaper |
author |
Ruszkiczay-Rüdiger, Zsófia Kern, Zoltán Urdea, Petru Madarász, Balázs Braucher, Régis |
author_facet |
Ruszkiczay-Rüdiger, Zsófia Kern, Zoltán Urdea, Petru Madarász, Balázs Braucher, Régis |
author_sort |
Ruszkiczay-Rüdiger, Zsófia |
title |
Limited glacial erosion during the last glaciation in mid-latitude cirques (Retezat Mts, Southern Carpathians, Romania) |
title_short |
Limited glacial erosion during the last glaciation in mid-latitude cirques (Retezat Mts, Southern Carpathians, Romania) |
title_full |
Limited glacial erosion during the last glaciation in mid-latitude cirques (Retezat Mts, Southern Carpathians, Romania) |
title_fullStr |
Limited glacial erosion during the last glaciation in mid-latitude cirques (Retezat Mts, Southern Carpathians, Romania) |
title_full_unstemmed |
Limited glacial erosion during the last glaciation in mid-latitude cirques (Retezat Mts, Southern Carpathians, Romania) |
title_sort |
limited glacial erosion during the last glaciation in mid-latitude cirques (retezat mts, southern carpathians, romania) |
publisher |
HAL CCSD |
publishDate |
2021 |
url |
https://hal.archives-ouvertes.fr/hal-03204190 https://hal.archives-ouvertes.fr/hal-03204190/document https://hal.archives-ouvertes.fr/hal-03204190/file/1-s2.0-S0169555X21001276-main.pdf https://doi.org/10.1016/j.geomorph.2021.107719 |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
glacier Greenland |
genre_facet |
glacier Greenland |
op_source |
ISSN: 0169-555X Geomorphology https://hal.archives-ouvertes.fr/hal-03204190 Geomorphology, Elsevier, 2021, 384, pp.107719. ⟨10.1016/j.geomorph.2021.107719⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.geomorph.2021.107719 hal-03204190 https://hal.archives-ouvertes.fr/hal-03204190 https://hal.archives-ouvertes.fr/hal-03204190/document https://hal.archives-ouvertes.fr/hal-03204190/file/1-s2.0-S0169555X21001276-main.pdf doi:10.1016/j.geomorph.2021.107719 WOS: 000645638200003 |
op_rights |
http://creativecommons.org/licenses/by/ info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1016/j.geomorph.2021.107719 |
container_title |
Geomorphology |
container_volume |
384 |
container_start_page |
107719 |
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1766009487025504256 |
spelling |
ftccsdartic:oai:HAL:hal-03204190v1 2023-05-15T16:21:29+02:00 Limited glacial erosion during the last glaciation in mid-latitude cirques (Retezat Mts, Southern Carpathians, Romania) Ruszkiczay-Rüdiger, Zsófia Kern, Zoltán Urdea, Petru Madarász, Balázs Braucher, Régis Institute for Geological and Geochemical Research, Research Centre for Astronomy and Earth Sciences Centre européen de recherche et d'enseignement des géosciences de l'environnement (CEREGE) Institut de Recherche pour le Développement (IRD)-Aix Marseille Université (AMU)-Collège de France (CdF (institution))-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE) National Research, Development and Innovation Office of Hungary124807119039European CommissionGINOP-2.3.2-15-2016-00009Centre National de la Recherche Scientifique (CNRS)French National Research Agency (ANR)IRD 2021-07 https://hal.archives-ouvertes.fr/hal-03204190 https://hal.archives-ouvertes.fr/hal-03204190/document https://hal.archives-ouvertes.fr/hal-03204190/file/1-s2.0-S0169555X21001276-main.pdf https://doi.org/10.1016/j.geomorph.2021.107719 en eng HAL CCSD Elsevier info:eu-repo/semantics/altIdentifier/doi/10.1016/j.geomorph.2021.107719 hal-03204190 https://hal.archives-ouvertes.fr/hal-03204190 https://hal.archives-ouvertes.fr/hal-03204190/document https://hal.archives-ouvertes.fr/hal-03204190/file/1-s2.0-S0169555X21001276-main.pdf doi:10.1016/j.geomorph.2021.107719 WOS: 000645638200003 http://creativecommons.org/licenses/by/ info:eu-repo/semantics/OpenAccess ISSN: 0169-555X Geomorphology https://hal.archives-ouvertes.fr/hal-03204190 Geomorphology, Elsevier, 2021, 384, pp.107719. ⟨10.1016/j.geomorph.2021.107719⟩ [SDU.STU.TE]Sciences of the Universe [physics]/Earth Sciences/Tectonics [SDU.STU.GM]Sciences of the Universe [physics]/Earth Sciences/Geomorphology [SDE.MCG]Environmental Sciences/Global Changes [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment info:eu-repo/semantics/article Journal articles 2021 ftccsdartic https://doi.org/10.1016/j.geomorph.2021.107719 2021-10-23T22:57:07Z International audience The studied dataset from the Southern Carpathians permitted the quantification of a considerable amount of inherited 10 Be in the glacial boulders and bedrock samples in the cirque area. The samples from the glacial phases of largest extension display no signs of significant inheritance, and enabled the establishment of a deglaciation chronology in the southern valleys of the Retezat Mts. The timing of the maximum glacier extent (20.6 +0.8 / −1.3 ka) coincided with the Last Glacial Maximum, which was followed by five deglaciation phases during the Lateglacial having partly overlapping ages due to fast glacier retreat (at 18.4 +0.7 / −1.1 ka; 16.9 ± 0.9 ka, 15.8 +0.9 / −0.6 ka, 15.6 +0.8 / −0.8 ka and 14.4 ± 0.5 ka) but could be distinguished by the position of their terminal moraines. The currently available geochronological data do not support the assumption of any major glacial re-advance after Greenland Stadial 2.1a in the Retezat Mts. Given the lack of independent geochronological data, the amount of inherited cosmogenic nuclides is tentatively estimated by accepting the youngest cosmic ray exposure age(s) as the time of moraine deposition and abandonment by the glacier. The calculated amount of inherited 10 Be enables the estimation of a glacial erosion depth of 1.1-1.6 m for the bedrock samples and 1.4-1.8 m for the glacial boulders. The duration of the ice-covered and ice-free periods was adjusted in relation to independent paleoenvironmental and paleoclimatological data. The glacial denudation rate in the cirques was estimated at 19-28 mm/kyr and 24-33 mm/kyr for bedrock and boulders, respectively. The limited glacial erosion in the cirques during the last glaciation is attributed to frozen-bed conditions with no considerable glacial deepening during the more extended glacial phases. Only when warming led to the retreat of the glaciers to their cirques, they become steeper and shift to being warm-based and thus more erosive. However, the limited time spent under these conditions ... Article in Journal/Newspaper glacier Greenland Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) Greenland Geomorphology 384 107719 |