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SUMMARY:The separation of Britain from mainland Europe in the late Quatern
 ary  - Jenny Collier\, Imperial College London
DTSTART:20161027T163000Z
DTEND:20161027T173000Z
UID:TALK67660@talks.cam.ac.uk
CONTACT:Della Murton
DESCRIPTION:It has been previously suggested that the separation of Britai
 n from mainland Europe in the late Quaternary was a consequence of a catas
 trophic flood caused by a spillover of a proglacial lake that occupied the
  present-day southern North Sea basin during the Elsterian glaciation. Suc
 h an event would have significant palaeogeographic\, biological and archae
 ological implications\, but it remains controversial. Ten years ago we dis
 covered a drainage system carved into the floor of the English Channel tha
 t is consistent with the catastrophic flood model.  In this talk I will pr
 esent a new compilation of seabed bathymetry and sub-bottom profiler data 
 that we have used to analyse key landform features both within the downstr
 eam region and at the proposed breach point at the Straits of Dover.  Our 
 observations support the hypothesis that the landforms were initially carv
 ed by high-water volume flows via a unique catastrophic drainage of a pro-
 glacial lake in the southern North Sea at the Dover Strait rather than by 
 fluvial erosion throughout the Pleistocene.  The system also shows evidenc
 e for modification by a second flood that may have been a consequence of s
 pillover of younger ice-marginal lake systems to the east\, either in the 
 North Sea basin or mainland Europe.
LOCATION:Latimer Room (Old Court)\, Clare College\, Trinity Lane
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