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SUMMARY:The ‘fingerprint’ left by icebergs that plough through sedimen
 t: Glacial Lake Agassiz\, Manitoba\, Canada - Dr Lorna Linch\, University 
 of Brighton
DTSTART:20130612T153000Z
DTEND:20130612T163000Z
UID:TALK45654@talks.cam.ac.uk
CONTACT:Steven Palmer
DESCRIPTION:Icebergs plough through unconsolidated lake/sea sediments goug
 ing out kilometre long grooves\, 100s of metres wide and tens of metres de
 ep. Although the surface morphology of iceberg scours is well-documented\,
  little is known about what scours look like in stratigraphic section\, pa
 rticularly where surface characteristics are absent (e.g. through decay or
  burial). This investigation establishes a definitive suite of diagnostic 
 criteria for identifying iceberg scours in clays by macroscopically and mi
 croscopically (2D thin sections) examining sediment deformation below iceb
 erg scours in former Glacial Lake Agassiz\, Manitoba\, Canada. This suite 
 of structures is unlike those found in subglacial tills and mass-wasting d
 eposits. This research will be particularly valuable in palaeoenvironmenta
 l reconstruction and in predicting glacial dynamics. In addition\, it may 
 eventually aid structural engineering on polar shelves\, which could be of
  great value to oil and gas companies.
LOCATION:Scott Polar Research Institute\, main lecture theatre
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