Schmidt-Hammer Dating of Five Rock Slope Failures in the Westfjords of Iceland
Rock slopes failures (RSF) are numerous in Iceland, especially in the eastern, northern and northwestern regions, which correspond to Tertiary basaltic formations. Five sites have been specifically studied in the Westfjords around Bolungarvík: Óshólar, Minni-Hlið, Sunddalur, Vatnadalur and Meira-Hra...
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ftunivparis1:oai:HAL:hal-04117985v1 2024-02-11T10:02:35+01:00 Schmidt-Hammer Dating of Five Rock Slope Failures in the Westfjords of Iceland Portier, Émilie Mercier, Denis Decaulne, Armelle Sorbonne Université (SU) Laboratoire de géographie physique : Environnements Quaternaires et Actuels (LGP) Université Paris 1 Panthéon-Sorbonne (UP1)-Université Paris-Est Créteil Val-de-Marne - Paris 12 (UPEC UP12)-Centre National de la Recherche Scientifique (CNRS) IPEV Programme PARI 1266 Chamonix (74400), France 2023-06-09 https://hal.science/hal-04117985 en eng HAL CCSD hal-04117985 https://hal.science/hal-04117985 European Young Geomorphologists Meeting https://hal.science/hal-04117985 European Young Geomorphologists Meeting, Jun 2023, Chamonix (74400), France SHED radiocarbon dating landslides Paraglacial Deglaciation [SDE]Environmental Sciences [SDU.STU.GM]Sciences of the Universe [physics]/Earth Sciences/Geomorphology info:eu-repo/semantics/conferenceObject Conference papers 2023 ftunivparis1 2024-01-23T23:37:40Z Rock slopes failures (RSF) are numerous in Iceland, especially in the eastern, northern and northwestern regions, which correspond to Tertiary basaltic formations. Five sites have been specifically studied in the Westfjords around Bolungarvík: Óshólar, Minni-Hlið, Sunddalur, Vatnadalur and Meira-Hraun. The aim is to obtain dating of RSF to better understand the chronosequence of post-glacial events.The use of Schmidt-hammer on RSF deposits, consisting in measuring the hardness of the deposited blocks, made it possible to establish relative dating between the different elements of the RSF, and to calibrate datings of the different RSF taking into account carbon-14 dates obtained onto and in the close vicinity of the same landforms, taking benefits of the landform superimposition. For this purpose, macroremains of Betula sp. and paleo-soils were sampled from pits dug in peaty depressions.The SHED results (Schmidt-hammer exposure age dating) thus date the oldest of Óshólar’s RSF to 11,000 cal BP, the Minni-Hlið’s RSF to 9,500 cal BP, that of Sunddalur at 8,700 cal BP, the Vatnadalur one to 8,200 cal BP and finally that of Meira-Hraun at 8,700 cal BP.The chronology of the RSFs dated to the beginning of the deglaciation or the first times of the Holocene therefore fits a paraglacial logic of the emplacement of these deposits. Conference Object Bolungarvík Iceland Université Paris 1 Panthéon-Sorbonne: HAL Bolungarvík ENVELOPE(-23.249,-23.249,66.159,66.159) Hraun ENVELOPE(-19.263,-19.263,63.507,63.507) Óshólar ENVELOPE(-23.200,-23.200,66.150,66.150) Sunddalur ENVELOPE(-23.552,-23.552,66.099,66.099) |
institution |
Open Polar |
collection |
Université Paris 1 Panthéon-Sorbonne: HAL |
op_collection_id |
ftunivparis1 |
language |
English |
topic |
SHED radiocarbon dating landslides Paraglacial Deglaciation [SDE]Environmental Sciences [SDU.STU.GM]Sciences of the Universe [physics]/Earth Sciences/Geomorphology |
spellingShingle |
SHED radiocarbon dating landslides Paraglacial Deglaciation [SDE]Environmental Sciences [SDU.STU.GM]Sciences of the Universe [physics]/Earth Sciences/Geomorphology Portier, Émilie Mercier, Denis Decaulne, Armelle Schmidt-Hammer Dating of Five Rock Slope Failures in the Westfjords of Iceland |
topic_facet |
SHED radiocarbon dating landslides Paraglacial Deglaciation [SDE]Environmental Sciences [SDU.STU.GM]Sciences of the Universe [physics]/Earth Sciences/Geomorphology |
description |
Rock slopes failures (RSF) are numerous in Iceland, especially in the eastern, northern and northwestern regions, which correspond to Tertiary basaltic formations. Five sites have been specifically studied in the Westfjords around Bolungarvík: Óshólar, Minni-Hlið, Sunddalur, Vatnadalur and Meira-Hraun. The aim is to obtain dating of RSF to better understand the chronosequence of post-glacial events.The use of Schmidt-hammer on RSF deposits, consisting in measuring the hardness of the deposited blocks, made it possible to establish relative dating between the different elements of the RSF, and to calibrate datings of the different RSF taking into account carbon-14 dates obtained onto and in the close vicinity of the same landforms, taking benefits of the landform superimposition. For this purpose, macroremains of Betula sp. and paleo-soils were sampled from pits dug in peaty depressions.The SHED results (Schmidt-hammer exposure age dating) thus date the oldest of Óshólar’s RSF to 11,000 cal BP, the Minni-Hlið’s RSF to 9,500 cal BP, that of Sunddalur at 8,700 cal BP, the Vatnadalur one to 8,200 cal BP and finally that of Meira-Hraun at 8,700 cal BP.The chronology of the RSFs dated to the beginning of the deglaciation or the first times of the Holocene therefore fits a paraglacial logic of the emplacement of these deposits. |
author2 |
Sorbonne Université (SU) Laboratoire de géographie physique : Environnements Quaternaires et Actuels (LGP) Université Paris 1 Panthéon-Sorbonne (UP1)-Université Paris-Est Créteil Val-de-Marne - Paris 12 (UPEC UP12)-Centre National de la Recherche Scientifique (CNRS) IPEV Programme PARI 1266 |
format |
Conference Object |
author |
Portier, Émilie Mercier, Denis Decaulne, Armelle |
author_facet |
Portier, Émilie Mercier, Denis Decaulne, Armelle |
author_sort |
Portier, Émilie |
title |
Schmidt-Hammer Dating of Five Rock Slope Failures in the Westfjords of Iceland |
title_short |
Schmidt-Hammer Dating of Five Rock Slope Failures in the Westfjords of Iceland |
title_full |
Schmidt-Hammer Dating of Five Rock Slope Failures in the Westfjords of Iceland |
title_fullStr |
Schmidt-Hammer Dating of Five Rock Slope Failures in the Westfjords of Iceland |
title_full_unstemmed |
Schmidt-Hammer Dating of Five Rock Slope Failures in the Westfjords of Iceland |
title_sort |
schmidt-hammer dating of five rock slope failures in the westfjords of iceland |
publisher |
HAL CCSD |
publishDate |
2023 |
url |
https://hal.science/hal-04117985 |
op_coverage |
Chamonix (74400), France |
long_lat |
ENVELOPE(-23.249,-23.249,66.159,66.159) ENVELOPE(-19.263,-19.263,63.507,63.507) ENVELOPE(-23.200,-23.200,66.150,66.150) ENVELOPE(-23.552,-23.552,66.099,66.099) |
geographic |
Bolungarvík Hraun Óshólar Sunddalur |
geographic_facet |
Bolungarvík Hraun Óshólar Sunddalur |
genre |
Bolungarvík Iceland |
genre_facet |
Bolungarvík Iceland |
op_source |
European Young Geomorphologists Meeting https://hal.science/hal-04117985 European Young Geomorphologists Meeting, Jun 2023, Chamonix (74400), France |
op_relation |
hal-04117985 https://hal.science/hal-04117985 |
_version_ |
1790598621127770112 |