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SUMMARY:Characterising geomorphic responses to tectonic perturbation:  Ins
 ights and implications. - Alex Whittaker\, Imperial College London
DTSTART:20090303T163000Z
DTEND:20090303T173000Z
UID:TALK15300@talks.cam.ac.uk
CONTACT:John Maclennan
DESCRIPTION:Understanding the transient dynamics of the Earth's landscape 
 in response to tectonic forcing remains an outstanding challenge in the fi
 eld of geomorphology. In principle\, it should give insight into long term
  fluvial erosion processes\, is vital in order to characterise the sensiti
 vity of landscape to changing boundary conditions\, and is essential if we
  are to improve our ability to extract tectonic information from topograph
 ic data sets.  Here we present detailed data from rivers crossing active n
 ormal faults that differ in their rate\, history and spatial distribution 
 of uplift.  These data allow diagnostic field criteria for transience in t
 he landscape to be defined\, enable the quantification of landscape respon
 se time as a function of dominant fluvial erosion law and provide improved
  constraints for landscape evolution models.  We use these results to eval
 uate the extent to which it is now possible to extract tectonic uplift rat
 es from transient landscapes.
LOCATION:Harker 1 seminar room\, Department of Earth Sciences
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