Tracing marine cryptotephras in the North Atlantic during the last glacial period: Improving the North Atlantic marine tephrostratigraphic framework
© 2018 Elsevier Ltd Tephrochronology is increasingly being recognised as a key tool for the correlation of disparate palaeoclimatic archives, underpinning chronological models and facilitating climatically independent comparisons of climate proxies. Tephra frameworks integrating both distal and prox...
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ftqueenmaryuniv:oai:qmro.qmul.ac.uk:123456789/55005 2023-05-15T16:29:50+02:00 Tracing marine cryptotephras in the North Atlantic during the last glacial period: Improving the North Atlantic marine tephrostratigraphic framework Abbott, PM Griggs, AJ BOURNE, AJ Chapman, MR Davies, SM 2018-06-01 169 - 186 https://qmro.qmul.ac.uk/xmlui/handle/123456789/55005 https://doi.org/10.1016/j.quascirev.2018.03.023 en eng Quaternary Science Reviews 0277-3791 https://qmro.qmul.ac.uk/xmlui/handle/123456789/55005 doi:10.1016/j.quascirev.2018.03.023 © 2018 Elsevier Ltd. All rights reserved. Article 2018 ftqueenmaryuniv https://doi.org/10.1016/j.quascirev.2018.03.023 2022-09-25T20:18:03Z © 2018 Elsevier Ltd Tephrochronology is increasingly being recognised as a key tool for the correlation of disparate palaeoclimatic archives, underpinning chronological models and facilitating climatically independent comparisons of climate proxies. Tephra frameworks integrating both distal and proximal tephra occurrences are essential to these investigations providing key details on their spatial distributions, geochemical signatures, eruptive sources as well as any available chronological and/or stratigraphic information. Frameworks also help to avoid mis-correlation of horizons and provide important information on volcanic history. Here we present a comprehensive chronostratigraphic framework of 14 tephra horizons from North Atlantic marine sequences spanning 60-25 cal ka BP. Horizons previously discovered as visible or coarse-grained deposits have been combined with 11 newly recognised volcanic deposits, identified through the application of cryptotephra identification and characterisation methods to a wide network of marine sequences. Their isochronous integrity has been assessed using their physical characteristics. All horizons originated from Iceland with the vast majority having a basaltic composition sourced from the Grímsvötn, Kverkfjöll, Hekla/Vatnafjöll and Katla volcanic systems. New occurrences, improved stratigraphic placements and a refinement of the geochemical signature of the NAAZ II are reported and the range of the FMAZ IV has been extended. In addition, several significant geochemical populations that further investigations could show to be isochronous are reported. This tephra framework provides the foundation for the correlation and synchronisation of these marine records to the Greenland ice-cores and European terrestrial records to investigate the phasing, rate, timing and mechanisms controlling rapid climate changes that characterised the last glacial period. Article in Journal/Newspaper Greenland Greenland ice cores Hekla Iceland Katla North Atlantic Queen Mary University of London: Queen Mary Research Online (QMRO) Greenland Katla ENVELOPE(-19.062,-19.062,63.631,63.631) Kverkfjöll ENVELOPE(-16.700,-16.700,64.650,64.650) Vatnafjöll ENVELOPE(-19.600,-19.600,63.933,63.933) Quaternary Science Reviews 189 169 186 |
institution |
Open Polar |
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Queen Mary University of London: Queen Mary Research Online (QMRO) |
op_collection_id |
ftqueenmaryuniv |
language |
English |
description |
© 2018 Elsevier Ltd Tephrochronology is increasingly being recognised as a key tool for the correlation of disparate palaeoclimatic archives, underpinning chronological models and facilitating climatically independent comparisons of climate proxies. Tephra frameworks integrating both distal and proximal tephra occurrences are essential to these investigations providing key details on their spatial distributions, geochemical signatures, eruptive sources as well as any available chronological and/or stratigraphic information. Frameworks also help to avoid mis-correlation of horizons and provide important information on volcanic history. Here we present a comprehensive chronostratigraphic framework of 14 tephra horizons from North Atlantic marine sequences spanning 60-25 cal ka BP. Horizons previously discovered as visible or coarse-grained deposits have been combined with 11 newly recognised volcanic deposits, identified through the application of cryptotephra identification and characterisation methods to a wide network of marine sequences. Their isochronous integrity has been assessed using their physical characteristics. All horizons originated from Iceland with the vast majority having a basaltic composition sourced from the Grímsvötn, Kverkfjöll, Hekla/Vatnafjöll and Katla volcanic systems. New occurrences, improved stratigraphic placements and a refinement of the geochemical signature of the NAAZ II are reported and the range of the FMAZ IV has been extended. In addition, several significant geochemical populations that further investigations could show to be isochronous are reported. This tephra framework provides the foundation for the correlation and synchronisation of these marine records to the Greenland ice-cores and European terrestrial records to investigate the phasing, rate, timing and mechanisms controlling rapid climate changes that characterised the last glacial period. |
format |
Article in Journal/Newspaper |
author |
Abbott, PM Griggs, AJ BOURNE, AJ Chapman, MR Davies, SM |
spellingShingle |
Abbott, PM Griggs, AJ BOURNE, AJ Chapman, MR Davies, SM Tracing marine cryptotephras in the North Atlantic during the last glacial period: Improving the North Atlantic marine tephrostratigraphic framework |
author_facet |
Abbott, PM Griggs, AJ BOURNE, AJ Chapman, MR Davies, SM |
author_sort |
Abbott, PM |
title |
Tracing marine cryptotephras in the North Atlantic during the last glacial period: Improving the North Atlantic marine tephrostratigraphic framework |
title_short |
Tracing marine cryptotephras in the North Atlantic during the last glacial period: Improving the North Atlantic marine tephrostratigraphic framework |
title_full |
Tracing marine cryptotephras in the North Atlantic during the last glacial period: Improving the North Atlantic marine tephrostratigraphic framework |
title_fullStr |
Tracing marine cryptotephras in the North Atlantic during the last glacial period: Improving the North Atlantic marine tephrostratigraphic framework |
title_full_unstemmed |
Tracing marine cryptotephras in the North Atlantic during the last glacial period: Improving the North Atlantic marine tephrostratigraphic framework |
title_sort |
tracing marine cryptotephras in the north atlantic during the last glacial period: improving the north atlantic marine tephrostratigraphic framework |
publishDate |
2018 |
url |
https://qmro.qmul.ac.uk/xmlui/handle/123456789/55005 https://doi.org/10.1016/j.quascirev.2018.03.023 |
long_lat |
ENVELOPE(-19.062,-19.062,63.631,63.631) ENVELOPE(-16.700,-16.700,64.650,64.650) ENVELOPE(-19.600,-19.600,63.933,63.933) |
geographic |
Greenland Katla Kverkfjöll Vatnafjöll |
geographic_facet |
Greenland Katla Kverkfjöll Vatnafjöll |
genre |
Greenland Greenland ice cores Hekla Iceland Katla North Atlantic |
genre_facet |
Greenland Greenland ice cores Hekla Iceland Katla North Atlantic |
op_relation |
Quaternary Science Reviews 0277-3791 https://qmro.qmul.ac.uk/xmlui/handle/123456789/55005 doi:10.1016/j.quascirev.2018.03.023 |
op_rights |
© 2018 Elsevier Ltd. All rights reserved. |
op_doi |
https://doi.org/10.1016/j.quascirev.2018.03.023 |
container_title |
Quaternary Science Reviews |
container_volume |
189 |
container_start_page |
169 |
op_container_end_page |
186 |
_version_ |
1766019540780580864 |