Vedde Ash constrains Younger Dryas glacier re-advance and rapid glacio-isostatic rebound on Svalbard
The distal deposition of tephra from explosive volcanism has the potential to geochronologically constrain sedimentary archives and landforms. With this technique, we constrain a Late Glacial glacier re-advance on Svalbard and suggest that glacioisostatic emergence rates during the Younger Dryas chr...
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ftethz:oai:www.research-collection.ethz.ch:20.500.11850/520263 2023-05-15T16:22:08+02:00 Vedde Ash constrains Younger Dryas glacier re-advance and rapid glacio-isostatic rebound on Svalbard Farnsworth, Wesley R. Ingólfsson, Ólafur Mannerfelt, Erik S. Kalliokoski, Maarit H. Guðmundsdóttir, Esther R. Retelle, Michael Allaart, Lis Brynjólfsson, Skafti Furze, Mark F.A. Hancock, Holt J. Kjær, Kurt H. Pieńkowski, Anna J. Schomacker, Anders 2022-01 application/application/pdf https://hdl.handle.net/20.500.11850/520263 https://doi.org/10.3929/ethz-b-000520263 en eng Elsevier info:eu-repo/semantics/altIdentifier/doi/10.1016/j.qsa.2021.100041 info:eu-repo/semantics/altIdentifier/wos/000903538600002 http://hdl.handle.net/20.500.11850/520263 doi:10.3929/ethz-b-000520263 info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/4.0/ Creative Commons Attribution 4.0 International CC-BY Quaternary Science Advances, 5 Cryptotephra Glacio-isostatic adjustment Restrained rebound Relative sea level info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion 2022 ftethz https://doi.org/20.500.11850/520263 https://doi.org/10.3929/ethz-b-000520263 https://doi.org/10.1016/j.qsa.2021.100041 2023-02-13T00:59:06Z The distal deposition of tephra from explosive volcanism has the potential to geochronologically constrain sedimentary archives and landforms. With this technique, we constrain a Late Glacial glacier re-advance on Svalbard and suggest that glacioisostatic emergence rates during the Younger Dryas chronozone were at least three times greater than previous estimates. The identification of cryptotephra (i.e., non-visible) horizons, outside the extent of visible fallout, has greatly expanded the field of application of tephrochronology. While the cryptotephra revolution has triggered a burst of investigations using low-concentration tephra to constrain distal sedimentary sequences, as of yet, few investigations have used this tool to constrain the age of glacial landforms. Here we constrain a moraine formed during a glacier re-advance (12.8–12.2 cal ka BP) into a high relative sea level during the early Younger Dryas chronozone, with the first identified occurrence of the Icelandic Vedde Ash on Svalbard. Low concentrations (∼63 shards/g dried sediment) of the bimodal Vedde Ash (rhyolitic long axis c. 30–90 μm; basaltic c. 35–100 μm) were identified in a lake sediment sequence collected from the Heftyebreen glacier foreland, in a tributary valley to Grønfjorden, western Spitsbergen. Given that the cryptotephra was deposited within a lacustrine isolation basin, we further reconstruct a minimum rate of glacio-isostatic emergence during the end of the Late Glacial. Strong and longstanding evidence suggests Svalbard's west-coast cirque glaciers were less extensive during the Late Glacial than the Late Holocene. However, the Late Glacial Heftyebreen moraine suggests Svalbard glacier dynamics during this period may have been more complex. ISSN:2666-0334 Article in Journal/Newspaper glacier Svalbard Spitsbergen ETH Zürich Research Collection Svalbard Dryas Glacier ENVELOPE(-70.994,-70.994,82.035,82.035) Heftyebreen ENVELOPE(14.033,14.033,78.000,78.000) |
institution |
Open Polar |
collection |
ETH Zürich Research Collection |
op_collection_id |
ftethz |
language |
English |
topic |
Cryptotephra Glacio-isostatic adjustment Restrained rebound Relative sea level |
spellingShingle |
Cryptotephra Glacio-isostatic adjustment Restrained rebound Relative sea level Farnsworth, Wesley R. Ingólfsson, Ólafur Mannerfelt, Erik S. Kalliokoski, Maarit H. Guðmundsdóttir, Esther R. Retelle, Michael Allaart, Lis Brynjólfsson, Skafti Furze, Mark F.A. Hancock, Holt J. Kjær, Kurt H. Pieńkowski, Anna J. Schomacker, Anders Vedde Ash constrains Younger Dryas glacier re-advance and rapid glacio-isostatic rebound on Svalbard |
topic_facet |
Cryptotephra Glacio-isostatic adjustment Restrained rebound Relative sea level |
description |
The distal deposition of tephra from explosive volcanism has the potential to geochronologically constrain sedimentary archives and landforms. With this technique, we constrain a Late Glacial glacier re-advance on Svalbard and suggest that glacioisostatic emergence rates during the Younger Dryas chronozone were at least three times greater than previous estimates. The identification of cryptotephra (i.e., non-visible) horizons, outside the extent of visible fallout, has greatly expanded the field of application of tephrochronology. While the cryptotephra revolution has triggered a burst of investigations using low-concentration tephra to constrain distal sedimentary sequences, as of yet, few investigations have used this tool to constrain the age of glacial landforms. Here we constrain a moraine formed during a glacier re-advance (12.8–12.2 cal ka BP) into a high relative sea level during the early Younger Dryas chronozone, with the first identified occurrence of the Icelandic Vedde Ash on Svalbard. Low concentrations (∼63 shards/g dried sediment) of the bimodal Vedde Ash (rhyolitic long axis c. 30–90 μm; basaltic c. 35–100 μm) were identified in a lake sediment sequence collected from the Heftyebreen glacier foreland, in a tributary valley to Grønfjorden, western Spitsbergen. Given that the cryptotephra was deposited within a lacustrine isolation basin, we further reconstruct a minimum rate of glacio-isostatic emergence during the end of the Late Glacial. Strong and longstanding evidence suggests Svalbard's west-coast cirque glaciers were less extensive during the Late Glacial than the Late Holocene. However, the Late Glacial Heftyebreen moraine suggests Svalbard glacier dynamics during this period may have been more complex. ISSN:2666-0334 |
format |
Article in Journal/Newspaper |
author |
Farnsworth, Wesley R. Ingólfsson, Ólafur Mannerfelt, Erik S. Kalliokoski, Maarit H. Guðmundsdóttir, Esther R. Retelle, Michael Allaart, Lis Brynjólfsson, Skafti Furze, Mark F.A. Hancock, Holt J. Kjær, Kurt H. Pieńkowski, Anna J. Schomacker, Anders |
author_facet |
Farnsworth, Wesley R. Ingólfsson, Ólafur Mannerfelt, Erik S. Kalliokoski, Maarit H. Guðmundsdóttir, Esther R. Retelle, Michael Allaart, Lis Brynjólfsson, Skafti Furze, Mark F.A. Hancock, Holt J. Kjær, Kurt H. Pieńkowski, Anna J. Schomacker, Anders |
author_sort |
Farnsworth, Wesley R. |
title |
Vedde Ash constrains Younger Dryas glacier re-advance and rapid glacio-isostatic rebound on Svalbard |
title_short |
Vedde Ash constrains Younger Dryas glacier re-advance and rapid glacio-isostatic rebound on Svalbard |
title_full |
Vedde Ash constrains Younger Dryas glacier re-advance and rapid glacio-isostatic rebound on Svalbard |
title_fullStr |
Vedde Ash constrains Younger Dryas glacier re-advance and rapid glacio-isostatic rebound on Svalbard |
title_full_unstemmed |
Vedde Ash constrains Younger Dryas glacier re-advance and rapid glacio-isostatic rebound on Svalbard |
title_sort |
vedde ash constrains younger dryas glacier re-advance and rapid glacio-isostatic rebound on svalbard |
publisher |
Elsevier |
publishDate |
2022 |
url |
https://hdl.handle.net/20.500.11850/520263 https://doi.org/10.3929/ethz-b-000520263 |
long_lat |
ENVELOPE(-70.994,-70.994,82.035,82.035) ENVELOPE(14.033,14.033,78.000,78.000) |
geographic |
Svalbard Dryas Glacier Heftyebreen |
geographic_facet |
Svalbard Dryas Glacier Heftyebreen |
genre |
glacier Svalbard Spitsbergen |
genre_facet |
glacier Svalbard Spitsbergen |
op_source |
Quaternary Science Advances, 5 |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.qsa.2021.100041 info:eu-repo/semantics/altIdentifier/wos/000903538600002 http://hdl.handle.net/20.500.11850/520263 doi:10.3929/ethz-b-000520263 |
op_rights |
info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/4.0/ Creative Commons Attribution 4.0 International |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/20.500.11850/520263 https://doi.org/10.3929/ethz-b-000520263 https://doi.org/10.1016/j.qsa.2021.100041 |
_version_ |
1766010110181638144 |