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Postglacial relative sea-level changes in northwest Iceland: Evidence from isolation basins, coastal lowlands and raised shorelines

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dc.contributor Háskóli Íslands
dc.contributor University of Iceland
dc.contributor.author Brader, Martin D.
dc.contributor.author Lloyd, Jeremy M.
dc.contributor.author Barlow, Natasha L.M.
dc.contributor.author Norddahl, Hreggvidur
dc.contributor.author Bentley, Michael J.
dc.contributor.author Newton, Anthony J.
dc.date.accessioned 2018-02-26T15:50:26Z
dc.date.available 2018-02-26T15:50:26Z
dc.date.issued 2017-08
dc.identifier.citation Brader, M. D., Lloyd, J. M., Barlow, N. L. M., Norðdahl, H., Bentley, M. J., & Newton, A. J. (2017). Postglacial relative sea-level changes in northwest Iceland: Evidence from isolation basins, coastal lowlands and raised shorelines. Quaternary Science Reviews, 169, 114-130. doi:https://doi.org/10.1016/j.quascirev.2017.05.022
dc.identifier.issn 0277-3791
dc.identifier.issn 1873-457X (eISSN)
dc.identifier.uri https://hdl.handle.net/20.500.11815/580
dc.description Open Access funded by Natural Environment Research Council
dc.description.abstract Relative sea-level (RSL) data provide constraints on land uplift associated with former ice loading and can be used to differentiate between contrasting ice unloading scenarios. Isolation basin, coastal lowland and geomorphological evidence is employed to reconstruct RSL changes in northwest (NW) Iceland, which may have experienced contrasting uplift patterns. Under local (NW) uplift, highest RSL would be expected in central Vestfirðir, whereas highest RSL would be closest to the main ice-loading centre under regional (central Iceland) uplift. Four new RSL records are presented based on 16 sea-level index points and 4 limiting ages from sites principally focussed along a transect away from central Iceland. The new RSL records highlight spatial variability of Holocene RSL changes and provide constraints on deglaciation. There is an increase in marine limit elevation with proximity to the proposed principal ice loading centre in central Iceland. Highest recorded marine limit shorelines are found in Hrútafjörður-Heggstaðanes (southeast), the lowest in Hlöðuvík and Rekavík bak Látrum (north), and at an intermediate elevation in Reykjanes-Laugardalur (central Vestfirðir). Evidence from Breiðavik-Látrar records early rapid deglaciation in Breiðafjörður or a complex interplay of multiple uplift centres. RSL fell rapidly following deglaciation in several locations as a result of the quick response of the Icelandic lithosphere to unloading. The RSL data along the transect show an uplift pattern consistent with extensive regional glaciation emanating from central Iceland, which could have implications for ice sheet configuration and patterns of deglaciation, glacio-isostatic adjustment modelling and the volume of meltwater input into the North Atlantic.
dc.description.sponsorship MDB was supported by an RGS-IBG Postgraduate Research Award, BGS Postgraduate Award, Van Mildert College Postgraduate Award, QRA Dudley Stamp Memorial Award and a Van Mildert College Principal's Award. Support in the field was provided by Sam Gunter, Harry Inman, Chris Darvill and Matthew Edwards. The authors would like to acknowledge the support of NERC Radiocarbon Allocations (Allocation No. 1689.0313 and 1748.1013) and NERC TAU Support (NERC TAU78/1012) and the assistance of Chris Hayward with electron microprobe analyses. We would also like to thank RANNIS (The Icelandic Centre for Research) and Umhverfisstofnun Islands for permission to undertake the research in Iceland. We also thank two anonymous reviewers for their valuable comments, which greatly improved the manuscript.
dc.format.extent 114-130
dc.language.iso en
dc.publisher Elsevier BV
dc.relation.ispartofseries Quaternary Science Reviews;169(1)
dc.rights info:eu-repo/semantics/openAccess
dc.subject Holocene
dc.subject Sea level changes
dc.subject Europe
dc.subject Micropalaeontology
dc.subject Diatoms
dc.subject Isolation basin
dc.subject Iceland
dc.subject Jarðsaga
dc.subject Nýlífsöld
dc.subject Sjávarstaða
dc.subject Steingervingafræði
dc.subject Dalir
dc.title Postglacial relative sea-level changes in northwest Iceland: Evidence from isolation basins, coastal lowlands and raised shorelines
dc.type info:eu-repo/semantics/article
dcterms.license This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/)
dc.description.version Peer Reviewed
dc.identifier.journal Quaternary Science Reviews
dc.identifier.doi 10.1016/j.quascirev.2017.05.022
dc.contributor.department Jarðvísindadeild (HÍ)
dc.contributor.department Faculty of Earth Sciences (UI)
dc.contributor.school Verkfræði- og náttúruvísindasvið (HÍ)
dc.contributor.school School of Engineering and Natural Sciences (UI)

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