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dc.contributor.authorGarcia, Men
dc.contributor.authorDowdeswell, Julianen
dc.contributor.authorNoormets, Ren
dc.contributor.authorHogan, KAen
dc.contributor.authorEvans, Jen
dc.contributor.authorÓ Cofaigh, Cen
dc.contributor.authorLarter, RDen
dc.date.accessioned2017-01-19T10:57:08Z
dc.date.available2017-01-19T10:57:08Z
dc.date.issued2016-12-01en
dc.identifier.issn0277-3791
dc.identifier.urihttps://www.repository.cam.ac.uk/handle/1810/261921
dc.description.abstractDetailed bathymetric and sub-bottom acoustic observations in Bourgeois Fjord (Marguerite Bay, Antarctic Peninsula) provide evidence on sedimentary processes and glacier dynamics during the last glacial cycle. Submarine landforms observed in the 50 km-long fjord, from the margins of modern tidewater glaciers to the now ice-distal Marguerite Bay, are described and interpreted. The landforms are grouped into four morpho-sedimentary systems: (i) glacial advance and full-glacial; (ii) subglacial and ice-marginal meltwater; (iii) glacial retreat and neoglaciation; and (iv) Holocene mass-wasting. These morpho-sedimentary systems have been integrated with morphological studies of the Marguerite Bay continental shelf and analysed in terms of the specific sedimentary processes and/or stages of the glacial cycle. They demonstrate the action of an ice-sheet outlet glacier that produced drumlins and crag-and-tail features in the main and outer fjord. Meltwater processes eroded bedrock channels and ponds infilled by fine-grained sediments. Following the last deglaciation of the fjord at about 9000 yr BP, subsequent Holocene neoglacial activity involved minor readvances of a tidewater glacier terminus in Blind Bay. Recent stillstands and/or minor readvances are inferred from the presence of a major transverse moraine that indicates grounded ice stabilization, probably during the Little Ice Age, and a series of smaller landforms that reveal intermittent minor readvances. Mass-wasting processes also affected the walls of the fjord and produced scars and fan-shaped deposits during the Holocene. Glacier-terminus changes during the last six decades, derived from satellite images and aerial photographs, reveal variable behaviour of adjacent tidewater glaciers. The smaller glaciers show the most marked recent retreat, influenced by regional physiography and catchment-area size.
dc.description.sponsorshipM. Garcia's work at the Scott Polar Research Institute, University of Cambridge, was funded by an EU Marie Curie Fellowship (PIEF-GA-2009-236526-CLIFORM).
dc.language.isoenen
dc.publisherElsevier
dc.rightsAttribution 4.0 Internationalen
dc.rightsAttribution 4.0 Internationalen
dc.rightsAttribution 4.0 Internationalen
dc.rightsAttribution 4.0 Internationalen
dc.rightsAttribution 4.0 Internationalen
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/en
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/en
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/en
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/en
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/en
dc.subjectAntarctic Peninsulaen
dc.subjectfjord systemsen
dc.subjectlast glacial maximumen
dc.subjectglacial sedimentary processesen
dc.subjectgeomorphologyen
dc.subjectROV-derived bathymetryen
dc.titleGeomorphic and shallow-acoustic investigation of an Antarctic Peninsula fjord system using high-resolution ROV and shipboard geophysical observations: Ice dynamics and behaviour since the Last Glacial Maximumen
dc.typeArticle
prism.endingPage138
prism.publicationDate2016en
prism.publicationNameQuaternary Science Reviewsen
prism.startingPage122
prism.volume153en
dc.identifier.doi10.17863/CAM.7159
dcterms.dateAccepted2016-10-20en
rioxxterms.versionofrecord10.1016/j.quascirev.2016.10.014en
rioxxterms.versionVoRen
rioxxterms.licenseref.urihttp://creativecommons.org/licenses/by/4.0/en
rioxxterms.licenseref.startdate2016-12-01en
dc.contributor.orcidDowdeswell, Julian [0000-0003-1369-9482]
rioxxterms.typeJournal Article/Reviewen
pubs.funder-project-idNERC (NE/C506372/1)
cam.issuedOnline2016-10-30en
cam.orpheus.successThu Jan 30 12:56:39 GMT 2020 - Embargo updated*
rioxxterms.freetoread.startdate2017-10-30


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Attribution 4.0 International
Except where otherwise noted, this item's licence is described as Attribution 4.0 International