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SUMMARY:Glacial landsystems: modern polar and alpine analogues for Quatern
 ary palaeoglaciology - Professor David Evans\, Durham University
DTSTART:20130130T163000Z
DTEND:20130130T173000Z
UID:TALK41508@talks.cam.ac.uk
CONTACT:Steven Palmer
DESCRIPTION:Accelerated historical recession of glacier snouts throughout 
 the world has resulted in the exposure of large areas of former glacier be
 ds and the abandonment of substantial ice-marginal landforms such as morai
 nes and glacifluvial depocenters. Inset sequences of these landforms docum
 ent the pattern\, pace\, and timing of glacier recession and also readvanc
 es triggered by regional climate oscillations. In high latitude and high a
 ltitude regions\, glacier recession has resulted in the development of sub
 stantial ice-cored terrain\, which demonstrates the importance of retarded
  deglaciation in the evolution of glacial landforms. Therefore\, the wide 
 range of landform assemblages that characterizes these deglaciated landsca
 pes provides a set of invaluable modern analogues or process-form models f
 or use in paleoglaciological reconstruction\, especially where spatial and
  temporal variability in glacier dynamics and thermal characteristics resu
 lts in the juxtaposition of different diagnostic terrain types. A landsyst
 em framework is used to classify a range of deglaciated terrains\, focusin
 g specifically on moraines and glacifluvial depo-centers as the most signi
 ficant landforms charting glacier recession. Landsystem signatures vary ac
 cording to glacier morphology and dynamics and therefore the initial focus
  of this presentation is on the role of glacier thermal regimes in moraine
 /till construction and the operation of the glacifluvial depositional syst
 em.
LOCATION:Scott Polar Research Institute\, main lecture theatre
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