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SUMMARY:Folding within deep-marine deposits: large contorted rafts and sma
 ll convolutions - Dr Lotty Gladstone\, BP Institute
DTSTART:20160602T103000Z
DTEND:20160602T113000Z
UID:TALK65180@talks.cam.ac.uk
CONTACT:Catherine Pearson
DESCRIPTION:I will present two examples of deformation found in deep-marin
 e deposits laid down by turbulent flows\, both of which can tell us a litt
 le about the nature of the flows. In the first part of the talk\, I shall 
 describe field examples of metre-scale folded rafts that are often found e
 ncased within the deposits. These have recently been interpreted as an imp
 ortant diagnostic feature of hybrid event beds\, a particular complex type
  of deep-marine deposit. I will discuss an alternative hypothesis based on
  new field data suggesting that the raft transport direction is transverse
  to the turbidity current flow direction. In the second part of the talk I
  will describe small-scale folds\, termed convolute lamination\, that may 
 represent Rayleigh Taylor instability combined with current shear. Support
 ing ancient and modern field evidence will be presented.
LOCATION:Open Plan Area\, BP Institute\, Madingley Rise CB3 0EZ
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