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SUMMARY:Sourcing Antarctic ice rafted debris: potential and pitfalls for r
 ecording past ice sheet dynamics - Dr. Michael Flowerdew
DTSTART:20130121T170000Z
DTEND:20130121T180000Z
UID:TALK39807@talks.cam.ac.uk
CONTACT:Lois Salem
DESCRIPTION:The age\, composition and shifts in the provenance of ice raft
 ed debris can potentially independently test models for the past evolution
  of ice sheets.  Interpreting Antarctic derived material is\, however\, co
 mpromised by its largely unknown geology\, an apparent lack of suitable pr
 ovenance techniques and an incomplete understanding of subglacial processe
 s. As shall be shown\, possible solutions to these shortcomings can come t
 hrough measuring the Pb isotopic composition of ice rafted feldspars.   Th
 e resulting improved provenance signal can help identify regions where sub
 glacial erosion has occurred but ultimately\, any interpretation from ice 
 rafted material must be treated with caution until the concealed geology i
 s better understood.
LOCATION:Harker Room 1\, Department of Earth Sciences
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