[Parameters: Topic='OCEANS', Term='MARINE SEDIMENTS', Variable_Level_1='STRATIGRAPHIC SEQUENCE']
AFI 02/48_02 - Ice-rafted debris on the Antarctic continental margin and dynamics of the Antarctic Ice Sheet - Vibro gravity cores, and sediments data collected from the Weddell Sea, Marguerite Bay, Feb - March 2002Entry ID: GB-NERC-BAS-AEDC-00289
Abstract: Ice-rafted (Heinrich) layers in the North Atlantic provide clear evidence that basins of large Quaternary ice sheets have, in the past, exhibited major dynamic instabilities. The presence of large ice sheets on the modern Antarctic continent provides an important opportunity to investigate the deposition of ice-rafted debris in a region where the dynamics of the parent drainage basins are known. ... The aim of the project was to reconstruct the Late Quaternary dynamics of the Antarctic Peninsula Ice Sheet in Marguerite Bay and to compare sedimentation and IRD records with the Larsen Ice Shelf area, on the other side of the Antarctic Peninsula. Two cruises were undertaken to collect the data. The JR71 (2002) cruise builds on the swath bathymetry and TOPAS survey undertaken on the JR59 (2001) cruise. Successful coring and examination of sediments now on and immediately beneath the sea floor, which provided the deforming bed of the former ice stream, enhanced our understanding
of conditions beneath ice streams.
Start Date: 2002-02-01Stop Date: 2002-03-01
Paleo Temporal Coverage
CRYOSPHERE > GLACIERS/ICE SHEETS > ICE SHEETS
TERRESTRIAL HYDROSPHERE > GLACIERS/ICE SHEETS > ICE SHEETS
OCEANS > MARINE SEDIMENTS > SEDIMENT TRANSPORT
OCEANS > MARINE SEDIMENTS > STRATIGRAPHIC SEQUENCE
PALEOCLIMATE > OCEAN/LAKE RECORDS > SEDIMENTS
PALEOCLIMATE > OCEAN/LAKE RECORDS > STRATIGRAPHIC SEQUENCE
CRYOSPHERE > GLACIERS/ICE SHEETS > GLACIER MOTION/ICE SHEET MOTION
TERRESTRIAL HYDROSPHERE > GLACIERS/ICE SHEETS > GLACIER MOTION/ICE SHEET MOTION
ISO Topic Category
Access Constraints This data is governed by the NERC Data Policy
Use Constraints This data is governed by the NERC Data Policy
Data Set Progress
Role: DIF AUTHOR
Phone: +44 (0)1223 221594
Phone: +44 (0) 1223 221312
Fax: +44 (0)1223 362616
Email: aedc at bas.ac.uk
Antarctic Environmental Data Centre British Antarctic Survey High Cross, Madingley Road
Province or State: Cambridgeshire
Postal Code: CB3 0ET
Country: UNITED KINGDOM
Scott Polar Research Institute
Dowdeswell, J.A., Ottesen, D., Evans, J., Ó Cofaigh, C. and Anderson, J.B., 2008. Submarine glacial landforms and rates of ice-stream collapse. Geology, v. 36, p. 819-822.
Cofaigh, C., Dowdeswell, J.A., Evans, J. and Larter, R.D., 2008. Geological constraints on Antarctic palaeo-ice stream retreat rates. Earth Surface Processes and Landforms, v. 33, p. 513-525.
... Cofaigh, C., Evans, J., Dowdeswell, J.A. and Larter, R.D., 2007. Till characteristics, genesis and transport beneath Antarctic paleo-ice streams. Journal of Geophysical Research, v. 112, F03006, doi:101029/2006JF000606.
Dowdeswell, J.A., 2006. Ice sheets and marine sedimentation on high-latitude continental margins. Blackwell. 30. Glacier Science and Environmental Change.
Cofaigh, C., Dowdeswell, J.A., Allen, C.S., Hiemstra, J., Pudsey, C.J., Evans, J. and Evans, D.J.A. 2005. Flow dynamics and till genesis associated with a marine-based Antarctic palaeo-ice stream. Quaternary Science Reviews. 24, 709-740.
Dowdeswell, J.A., Ó Cofaigh, C. and Pudsey, C.J. 2004. Thickness and extent of the subglacial till layer beneath an Antarctic paleo-ice stream. Geology. 32, 13-16.
Dowdeswell, J.A., Ó Cofaigh, C. and Pudsey, C.J. 2004. Continental slope morphology and sedimentary processes at the mouth of an Antarctic palaeo-ice stream. Marine Geology. 204, 203-214.
Cofaigh, C., Dowdeswell, J. A. and Pudsey, C. J. 2004. Sedimentation and Flow Dynamics Associated with a Marine-Based Antarctic Palaeo-Ice Stream. Antarctic Funding Initiative, Third Workshop, New Hall, Cambridge, 28-29 September 2004.
Cofaigh, C., Taylor, J., Dowdeswell, J.A. and Pudsey, C.J. 2003. Palaeo-ice streams, trough-mouth fans and high-latitude continental slope sedimentation. Boreas. 32, 37-55.
Dowdeswell, J. A., Pudsey, C. J. and Cofaigh, C. 2003. Geophysical and Geological Investigations of an Antarctic Peninsula Palaeo-Ice Stream. Antarctic Funding Initiative, Second Workshop, New Hall, Cambridge, 2-3 October 2003
Dowdeswell, J., Pudsey, C. and Ó Cofaigh, C. 2002. Ice Rafted Debris on the Antarctic Continental Margin and the Dynamics of the Antarctic Ice Sheet. Antarctic Funding Initiative [AFI], First Workshop, New Hall, Cambridge, 24 Sep 2002.
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Creation and Review Dates
DIF Creation Date: 2007-11-13
Last DIF Revision Date: 2010-04-27