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dc.contributor.authorLovell, Harold
dc.contributor.authorBenn, Douglas I.
dc.contributor.authorLukas, Sven
dc.contributor.authorSpagnolo, Matteo
dc.contributor.authorCook, Simon J.
dc.contributor.authorSwift, Darrel A.
dc.contributor.authorClark, Chris D.
dc.contributor.authorYde, Jacob C.
dc.contributor.authorWatts, Tom P.
dc.date.accessioned2018-10-31T00:48:38Z
dc.date.available2018-10-31T00:48:38Z
dc.date.issued2018-01-01
dc.identifier.citationLovell , H , Benn , D I , Lukas , S , Spagnolo , M , Cook , S J , Swift , D A , Clark , C D , Yde , J C & Watts , T P 2018 , ' Geomorphological investigation of multiphase glacitectonic composite ridge systems in Svalbard ' , Geomorphology , vol. 300 , pp. 176-188 . https://doi.org/10.1016/j.geomorph.2017.10.024en
dc.identifier.issn0169-555X
dc.identifier.otherPURE: 251464534
dc.identifier.otherPURE UUID: 554a77b6-22e8-4118-be85-91808d97923e
dc.identifier.otherRIS: urn:57120CA605DC764B31FDB955F0AFDB0F
dc.identifier.otherScopus: 85033561227
dc.identifier.otherWOS: 000418981700013
dc.identifier.otherORCID: /0000-0002-3604-0886/work/64697382
dc.identifier.urihttp://hdl.handle.net/10023/16357
dc.descriptionHL was funded by a NERC PhD studentship (NE/I528050/1) at Queen Mary University of London, the Queen Mary Postgraduate Research Fund, and an Arctic Field Grant from the Research Council of Norway through the University Centre in Svalbard (UNIS). SL acknowledges funding from the Westfield Trust. JCY was funded by a Carlsberg Foundation grant (2007/01/0383). A Royal Geographical Society Peter Fleming Award and a grant from the National Geographic Committee for Research and Exploration to Andy Hodson helped fund some of the fieldwork.en
dc.description.abstractSome surge-type glaciers on the High-Arctic archipelago of Svalbard have large glacitectonic composite ridge systems at their terrestrial margins. These have formed by rapid glacier advance into proglacial sediments during the active surge phase, creating multicrested moraine complexes. Such complexes can be formed during single surge advances or multiple surges to successively less-extensive positions. The few existing studies of composite ridge systems have relied on detailed information on internal structure and sedimentology to reconstruct their formation and links to surge processes. However, natural exposures of internal structure are commonly unavailable, and the creation of artificial exposures is often problematic in fragile Arctic environments. To compensate for these issues, we investigate the potential for reconstructing composite ridge system formation based on geomorphological evidence alone, focusing on clear morphostratigraphic relationships between ridges within the moraine complex and relict meltwater channels/outwash fans. Based on mapping at the margins of Finsterwalderbreen (in Van Keulenfjorden) and Grønfjordbreen (in Grønfjorden), we show that relict meltwater channels that breach outer parts of the composite ridge systems are in most cases truncated upstream within the ridge complex by an inner pushed ridge or ridges at their ice-proximal extents. Our interpretation of this relationship is that the entire composite ridge system is unlikely to have formed during the same glacier advance but is instead the product of multiple advances to successively less-extensive positions, whereby younger ridges are emplaced on the ice-proximal side of older ridges. This indicates that the Finsterwalderbreen composite ridge system has been formed by multiple separate advances, consistent with the cyclicity of surges. Being able to identify the frequency and magnitude of former surges is important as it provides insight into the past behaviour of surge-type glaciers and, if absolute dating is possible, allows for the assessment of surge-type glacier response to climate change on decadal to centennial timescales. Although further investigations into the internal structure of these deposits should be sought where possible, our study demonstrates that geomorphology could be an invaluable tool for reconstructing the formation of composite ridge systems.
dc.format.extent13
dc.language.isoeng
dc.relation.ispartofGeomorphologyen
dc.rights© 2017 Elsevier Ltd. This work has been made available online in accordance with the publisher’s policies. This is the author created, accepted version manuscript following peer review and may differ slightly from the final published version. The final published version of this work is available at https://doi.org/10.1016/j.geomorph.2017.10.024en
dc.subjectGlacitectonic composite ridge systemen
dc.subjectGlacier surgeen
dc.subjectGlacial geomorphologyen
dc.subjectSvalbarden
dc.subjectG Geography (General)en
dc.subjectGE Environmental Sciencesen
dc.subjectNDASen
dc.subject.lccG1en
dc.subject.lccGEen
dc.titleGeomorphological investigation of multiphase glacitectonic composite ridge systems in Svalbarden
dc.typeJournal articleen
dc.description.versionPostprinten
dc.contributor.institutionUniversity of St Andrews.School of Geography & Sustainable Developmenten
dc.contributor.institutionUniversity of St Andrews.Bell-Edwards Geographic Data Instituteen
dc.identifier.doihttps://doi.org/10.1016/j.geomorph.2017.10.024
dc.description.statusPeer revieweden
dc.date.embargoedUntil2018-10-31


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