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...
Published in: | Quaternary Science Advances |
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Language: | English |
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2022
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Online Access: | https://doi.org/10.1016/j.qsa.2021.100041 https://doaj.org/article/46dfba213e3b4861ac93e38c2bd0a1a3 |
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ftdoajarticles:oai:doaj.org/article:46dfba213e3b4861ac93e38c2bd0a1a3 2023-05-15T16:22:08+02:00 Vedde Ash constrains Younger Dryas glacier re-advance and rapid glacio-isostatic rebound on Svalbard Wesley R. Farnsworth Ólafur Ingólfsson Erik S. Mannerfelt Maarit H. Kalliokoski Esther R. Guðmundsdóttir Michael Retelle Lis Allaart Skafti Brynjólfsson Mark F.A. Furze Holt J. Hancock Kurt H. Kjær Anna J. Pieńkowski Anders Schomacker 2022-01-01T00:00:00Z https://doi.org/10.1016/j.qsa.2021.100041 https://doaj.org/article/46dfba213e3b4861ac93e38c2bd0a1a3 EN eng Elsevier http://www.sciencedirect.com/science/article/pii/S2666033421000204 https://doaj.org/toc/2666-0334 2666-0334 doi:10.1016/j.qsa.2021.100041 https://doaj.org/article/46dfba213e3b4861ac93e38c2bd0a1a3 Quaternary Science Advances, Vol 5, Iss , Pp 100041- (2022) Cryptotephra Glacio-isostatic adjustment Restrained rebound Relative sea level Geography. Anthropology. Recreation G Archaeology CC1-960 article 2022 ftdoajarticles https://doi.org/10.1016/j.qsa.2021.100041 2022-12-31T08:09:05Z 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. Article in Journal/Newspaper glacier Svalbard Spitsbergen Directory of Open Access Journals: DOAJ Articles Dryas Glacier ENVELOPE(-70.994,-70.994,82.035,82.035) Heftyebreen ENVELOPE(14.033,14.033,78.000,78.000) Svalbard Quaternary Science Advances 5 100041 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Cryptotephra Glacio-isostatic adjustment Restrained rebound Relative sea level Geography. Anthropology. Recreation G Archaeology CC1-960 |
spellingShingle |
Cryptotephra Glacio-isostatic adjustment Restrained rebound Relative sea level Geography. Anthropology. Recreation G Archaeology CC1-960 Wesley R. Farnsworth Ólafur Ingólfsson Erik S. Mannerfelt Maarit H. Kalliokoski Esther R. Guðmundsdóttir Michael Retelle Lis Allaart Skafti Brynjólfsson Mark F.A. Furze Holt J. Hancock Kurt H. Kjær Anna J. Pieńkowski Anders Schomacker 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 Geography. Anthropology. Recreation G Archaeology CC1-960 |
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. |
format |
Article in Journal/Newspaper |
author |
Wesley R. Farnsworth Ólafur Ingólfsson Erik S. Mannerfelt Maarit H. Kalliokoski Esther R. Guðmundsdóttir Michael Retelle Lis Allaart Skafti Brynjólfsson Mark F.A. Furze Holt J. Hancock Kurt H. Kjær Anna J. Pieńkowski Anders Schomacker |
author_facet |
Wesley R. Farnsworth Ólafur Ingólfsson Erik S. Mannerfelt Maarit H. Kalliokoski Esther R. Guðmundsdóttir Michael Retelle Lis Allaart Skafti Brynjólfsson Mark F.A. Furze Holt J. Hancock Kurt H. Kjær Anna J. Pieńkowski Anders Schomacker |
author_sort |
Wesley R. Farnsworth |
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://doi.org/10.1016/j.qsa.2021.100041 https://doaj.org/article/46dfba213e3b4861ac93e38c2bd0a1a3 |
long_lat |
ENVELOPE(-70.994,-70.994,82.035,82.035) ENVELOPE(14.033,14.033,78.000,78.000) |
geographic |
Dryas Glacier Heftyebreen Svalbard |
geographic_facet |
Dryas Glacier Heftyebreen Svalbard |
genre |
glacier Svalbard Spitsbergen |
genre_facet |
glacier Svalbard Spitsbergen |
op_source |
Quaternary Science Advances, Vol 5, Iss , Pp 100041- (2022) |
op_relation |
http://www.sciencedirect.com/science/article/pii/S2666033421000204 https://doaj.org/toc/2666-0334 2666-0334 doi:10.1016/j.qsa.2021.100041 https://doaj.org/article/46dfba213e3b4861ac93e38c2bd0a1a3 |
op_doi |
https://doi.org/10.1016/j.qsa.2021.100041 |
container_title |
Quaternary Science Advances |
container_volume |
5 |
container_start_page |
100041 |
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1766010110580097024 |