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Title

Grounding zone wedges, Kveithola Trough (NW Barents Sea)

AuthorsRebesco, Michele; Urgeles, Roger ; Llopart, Jaume ; Camerlenghi, Angelo
Issue Date1-May-2014
PublisherEuropean Geosciences Union
CitationGeophysical Research Abstracts 16: EGU2014-16840 (2014)
AbstractSwath bathymetry within Kveithola Trough (NW Barents Sea) shows a seafloor characterized by E-W trending megascale glacial lineations (MSGLs) overprinted by transverse Grounding Zone Wedges (GZWs), which give the trough a stair profile (Rebesco et al., 2011). GZWs are formed by deposition of subglacial till at temporarily stable ice-stream fronts in between successive episodic retreats (Rüther et al., 2012; Bjarnadóttir et al., 2012). Sub-bottom data show that present-day morphology is largely inherited from palaeo-seafloor topography of GZWs, which is draped by a deglacial to early Holocene glaciomarine sediments (about 15 m thick). The ice stream that produced such subglacial morphology was flowing from East to West inside Kveithola Trough during Last Glacial Maximum. Its rapid retreat was likely associated with progressive lift-offs, and successive rapid melting of the grounded ice, induced by the eustatic sea-level rise (Lucchi et al., 2013)
DescriptionRebesco, Michele ... et al.-- European Geosciences Union General Assembly 2014 (EGU2014), 27 april - 2 may 2014, Vienna, Austria.-- 1 page
Publisher version (URL)http://meetingorganizer.copernicus.org/EGU2014/posters/14252
URIhttp://hdl.handle.net/10261/115147
DOI1607-7962
Appears in Collections:(ICM) Comunicaciones congresos
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