Submarine Paleo-Failure Morphology On A Glaciated Continental Margin From 3d Seismic Data

  • J. S. Laberg
  • K. Andreassen
Part of the Advances in Natural and Technological Hazards Research book series (NTHR, volume 27)

The morphology of two lower – middle Pleistocene paleo-slope surfaces within a muddy glacigenic succession was studied on 3D seismic data. The lower surface is characterised by irregular relief. It terminates upslope by an escarpment that represents the upper part of a paleo-slide scar. The slide scar morphology is relatively similar to that of modern slide scars and failure is inferred to have occurred during or after a glacial maximum when the ice reached the paleo-shelf break. A large area immediately outside the paleo-slide scar was affected by sediment creep or sliding, thus the area of unstable sediments extends beyond the paleo-slide scar. The upper surface morphology is dominated by three straight to slightly meandering paleo-channels, at least one of them formed by mass wasting. Together, the two paleo-surfaces exemplify slope morphology that may result from sediment instability on glaciated margins.


Submarine Landslide Generic Mapping Tool Slide Scar Glaciate Margin Storegga Slide 
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Copyright information

© Springer 2007

Authors and Affiliations

  • J. S. Laberg
    • 1
  • K. Andreassen
    • 1
  1. 1.Department of GeologyUniversity of TromsøNorway

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