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dc.contributor.authorRüther, Denise Christina
dc.contributor.authorWinsborrow, Monica
dc.contributor.authorAndreassen, Karin
dc.contributor.authorForwick, Matthias
dc.date.accessioned2018-07-30T11:15:08Z
dc.date.available2018-07-30T11:15:08Z
dc.date.issued2017-05-12
dc.description.abstractGeomorphological evidence suggests that ice streams undergo frequent dynamic changes towards the end of their life cycles, but the associated sedimentary characteristics and processes remain poorly understood. Here, we present new sedimentological data from a Late Weichselian marine‐based ice stream in upper Bjørnøyrenna, northern Barents Sea, which experienced accelerated flow, intense calving of large icebergs, ice stream stagnation, ice shelf formation and disintegration. Observed till characteristics support the idea of spatially and temporally variable basal drag underneath ice streams. In addition, fast flow may have been accommodated in dilatant deforming till as well as through basal sliding over sticky spots of stiffer till. The grounding zone is shown to be highly transient and spatially variable during the final ice stream readvances, thus making the categories subglacial/proglacial of little value. In line with previous radiocarbon dates, we find that uppermost Bjørnøyrenna was deglaciated before ∼11.3–12.0k cal a BP. Finally, the provenances for the latest ice stream advance and an older ice flow event are inferred based on a novel way of using element geochemistry, helping define ice dome configuration in the northern Barents Sea.en_US
dc.descriptionThis is the peer reviewed version of the following article: Rüther, D.C., Winsborrow, M., Andreassen, K. & Forwick, M. (2017). Grounding line proximal sediment characteristics at a marine-based, late-stage ice stream margin. Journal of Quaternary Science, 32(4), 463-474. https://doi.org/10.1002/jqs.2939, which has been published in final form at <a href=https://doi.org/10.1002/jqs.2939> https://doi.org/10.1002/jqs.2939</a>. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Use of Self-Archived Versions.en_US
dc.identifier.citationRüther, D.C., Winsborrow, M., Andreassen, K. & Forwick, M. (2017). Grounding line proximal sediment characteristics at a marine-based, late-stage ice stream margin. Journal of Quaternary Science, 32(4), 463-474. https://doi.org/10.1002/jqs.2939en_US
dc.identifier.cristinIDFRIDAID 1472671
dc.identifier.doi10.1002/jqs.2939
dc.identifier.issn0267-8179
dc.identifier.issn1099-1417
dc.identifier.urihttps://hdl.handle.net/10037/13305
dc.language.isoengen_US
dc.publisherWileyen_US
dc.relation.journalJournal of Quaternary Science
dc.relation.projectIDinfo:eu-repo/grantAgreement/RCN/SFF/223259/Norway/Centre for Arctic Gas Hydrate, Environment and Climate/CAGE/en_US
dc.rights.accessRightsopenAccessen_US
dc.subjectVDP::Matematikk og Naturvitenskap: 400::Geofag: 450en_US
dc.subjectVDP::Mathematics and natural science: 400::Geosciences: 450en_US
dc.subjectgrounding line proximal sedimentationen_US
dc.subjectice stream dynamicsen_US
dc.subjectlate Weichselian deglaciationen_US
dc.subjectmega‐scale glacial lineationsen_US
dc.subjectnorthern Barents Seaen_US
dc.titleGrounding line proximal sediment characteristics at a marine-based, late-stage ice stream marginen_US
dc.typeJournal articleen_US
dc.typeTidsskriftartikkelen_US
dc.typePeer revieweden_US


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