Drumlin formation within the Bustarfell drumlin field, northeast Iceland: integrating sedimentological and ground‐penetrating radar data
Drumlins are important bedforms of former glaciated landscapes as they demonstrate past ice-flow directions and elucidate processes that operated at the ice/bed interface. Recently mapped drumlins and other streamlined subglacial bedforms in northeast Iceland reveal the flow-sets of cross-cutting pa...
Published in: | Journal of Quaternary Science |
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Format: | Article in Journal/Newspaper |
Language: | English |
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Wiley
2023
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Online Access: | http://nora.nerc.ac.uk/id/eprint/534482/ https://nora.nerc.ac.uk/id/eprint/534482/1/Arado%CC%81ttir%20et%20al._2023_Bustarfell.pdf https://doi.org/10.1002/jqs.3481 |
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ftnerc:oai:nora.nerc.ac.uk:534482 2023-12-24T10:17:37+01:00 Drumlin formation within the Bustarfell drumlin field, northeast Iceland: integrating sedimentological and ground‐penetrating radar data Aradóttir, Nína Benediktsson, Ívar Örn Ingólfsson, Ólafur Sturkell, Erik Brynjólfsson, Skafti Farnsworth, Wesley R. Phillips, Emrys 2023-04 text http://nora.nerc.ac.uk/id/eprint/534482/ https://nora.nerc.ac.uk/id/eprint/534482/1/Arado%CC%81ttir%20et%20al._2023_Bustarfell.pdf https://doi.org/10.1002/jqs.3481 en eng Wiley https://nora.nerc.ac.uk/id/eprint/534482/1/Arado%CC%81ttir%20et%20al._2023_Bustarfell.pdf Aradóttir, Nína; Benediktsson, Ívar Örn; Ingólfsson, Ólafur; Sturkell, Erik; Brynjólfsson, Skafti; Farnsworth, Wesley R.; Phillips, Emrys. 2023 Drumlin formation within the Bustarfell drumlin field, northeast Iceland: integrating sedimentological and ground‐penetrating radar data. Journal of Quaternary Science, 38 (3). 386-402. https://doi.org/10.1002/jqs.3481 <https://doi.org/10.1002/jqs.3481> cc_by_nc_nd_4 Publication - Article PeerReviewed 2023 ftnerc https://doi.org/10.1002/jqs.3481 2023-11-24T00:03:12Z Drumlins are important bedforms of former glaciated landscapes as they demonstrate past ice-flow directions and elucidate processes that operated at the ice/bed interface. Recently mapped drumlins and other streamlined subglacial bedforms in northeast Iceland reveal the flow-sets of cross-cutting palaeo-ice streams that were active within the Iceland Ice Sheet (IIS) during and following the Last Glacial Maximum. Here we study the Bustarfell drumlin field within the Vopnafjörður–Jökuldalsheiði flow-set. The internal architecture of two drumlins was investigated using sedimentological analysis and ground-penetrating radar (GPR, 50 and 100 MHz) to illuminate subglacial processes that contributed to drumlin formation, as well as the history and dynamics of the IIS. On the stoss side of one of the drumlins, two subglacial traction till units were identified, separated by a thick unit of deformed glaciofluvial sand and gravel. The core of glaciofluvial material suggests that the drumlin formed around well-drained patches (sticky spots) in the subglacial bed that retarded the ice flow locally through increased basal drag and encouraged till deposition. Furthermore, our GPR data indicate a combination of erosional and depositional processes. We suggest that the glaciofluvial sediments were deposited as small ice-marginal fans on the Bustarfell plateau, possibly during the Bølling–Allerød interstadial, and that the drumlins were formed around these fans during a subsequent readvance during the Younger Dryas. Article in Journal/Newspaper Ice Sheet Iceland Natural Environment Research Council: NERC Open Research Archive Vopnafjörður ENVELOPE(-14.828,-14.828,65.757,65.757) Jökuldalsheiði ENVELOPE(-15.400,-15.400,65.283,65.283) Bustarfell ENVELOPE(-21.433,-21.433,65.917,65.917) Journal of Quaternary Science 38 3 386 402 |
institution |
Open Polar |
collection |
Natural Environment Research Council: NERC Open Research Archive |
op_collection_id |
ftnerc |
language |
English |
description |
Drumlins are important bedforms of former glaciated landscapes as they demonstrate past ice-flow directions and elucidate processes that operated at the ice/bed interface. Recently mapped drumlins and other streamlined subglacial bedforms in northeast Iceland reveal the flow-sets of cross-cutting palaeo-ice streams that were active within the Iceland Ice Sheet (IIS) during and following the Last Glacial Maximum. Here we study the Bustarfell drumlin field within the Vopnafjörður–Jökuldalsheiði flow-set. The internal architecture of two drumlins was investigated using sedimentological analysis and ground-penetrating radar (GPR, 50 and 100 MHz) to illuminate subglacial processes that contributed to drumlin formation, as well as the history and dynamics of the IIS. On the stoss side of one of the drumlins, two subglacial traction till units were identified, separated by a thick unit of deformed glaciofluvial sand and gravel. The core of glaciofluvial material suggests that the drumlin formed around well-drained patches (sticky spots) in the subglacial bed that retarded the ice flow locally through increased basal drag and encouraged till deposition. Furthermore, our GPR data indicate a combination of erosional and depositional processes. We suggest that the glaciofluvial sediments were deposited as small ice-marginal fans on the Bustarfell plateau, possibly during the Bølling–Allerød interstadial, and that the drumlins were formed around these fans during a subsequent readvance during the Younger Dryas. |
format |
Article in Journal/Newspaper |
author |
Aradóttir, Nína Benediktsson, Ívar Örn Ingólfsson, Ólafur Sturkell, Erik Brynjólfsson, Skafti Farnsworth, Wesley R. Phillips, Emrys |
spellingShingle |
Aradóttir, Nína Benediktsson, Ívar Örn Ingólfsson, Ólafur Sturkell, Erik Brynjólfsson, Skafti Farnsworth, Wesley R. Phillips, Emrys Drumlin formation within the Bustarfell drumlin field, northeast Iceland: integrating sedimentological and ground‐penetrating radar data |
author_facet |
Aradóttir, Nína Benediktsson, Ívar Örn Ingólfsson, Ólafur Sturkell, Erik Brynjólfsson, Skafti Farnsworth, Wesley R. Phillips, Emrys |
author_sort |
Aradóttir, Nína |
title |
Drumlin formation within the Bustarfell drumlin field, northeast Iceland: integrating sedimentological and ground‐penetrating radar data |
title_short |
Drumlin formation within the Bustarfell drumlin field, northeast Iceland: integrating sedimentological and ground‐penetrating radar data |
title_full |
Drumlin formation within the Bustarfell drumlin field, northeast Iceland: integrating sedimentological and ground‐penetrating radar data |
title_fullStr |
Drumlin formation within the Bustarfell drumlin field, northeast Iceland: integrating sedimentological and ground‐penetrating radar data |
title_full_unstemmed |
Drumlin formation within the Bustarfell drumlin field, northeast Iceland: integrating sedimentological and ground‐penetrating radar data |
title_sort |
drumlin formation within the bustarfell drumlin field, northeast iceland: integrating sedimentological and ground‐penetrating radar data |
publisher |
Wiley |
publishDate |
2023 |
url |
http://nora.nerc.ac.uk/id/eprint/534482/ https://nora.nerc.ac.uk/id/eprint/534482/1/Arado%CC%81ttir%20et%20al._2023_Bustarfell.pdf https://doi.org/10.1002/jqs.3481 |
long_lat |
ENVELOPE(-14.828,-14.828,65.757,65.757) ENVELOPE(-15.400,-15.400,65.283,65.283) ENVELOPE(-21.433,-21.433,65.917,65.917) |
geographic |
Vopnafjörður Jökuldalsheiði Bustarfell |
geographic_facet |
Vopnafjörður Jökuldalsheiði Bustarfell |
genre |
Ice Sheet Iceland |
genre_facet |
Ice Sheet Iceland |
op_relation |
https://nora.nerc.ac.uk/id/eprint/534482/1/Arado%CC%81ttir%20et%20al._2023_Bustarfell.pdf Aradóttir, Nína; Benediktsson, Ívar Örn; Ingólfsson, Ólafur; Sturkell, Erik; Brynjólfsson, Skafti; Farnsworth, Wesley R.; Phillips, Emrys. 2023 Drumlin formation within the Bustarfell drumlin field, northeast Iceland: integrating sedimentological and ground‐penetrating radar data. Journal of Quaternary Science, 38 (3). 386-402. https://doi.org/10.1002/jqs.3481 <https://doi.org/10.1002/jqs.3481> |
op_rights |
cc_by_nc_nd_4 |
op_doi |
https://doi.org/10.1002/jqs.3481 |
container_title |
Journal of Quaternary Science |
container_volume |
38 |
container_issue |
3 |
container_start_page |
386 |
op_container_end_page |
402 |
_version_ |
1786205880374525952 |