Publications [#202157] of Lincoln F Pratson

Papers Accepted

1. David Amblas, Thomas P. Gerber, Ben De Mol, Roger Urgeles, Daniel Garcia-Castellanos, Miquel Canals, Lincoln F. Pratson, Angelo Camerlenghi, The survival of a submarine canyon during long-term outbuilding of a continental margin, Geology (2011)
   (last updated on 2012/01/17)

   Abstract:
   Net-depositional submarine canyons are common in slope strata but how they survive and prograde on constructional margins is poorly understood. In this study we present field evidence for the co-evolution of a submarine canyon and the adjacent continental slope. Using a 3D seismic data cube that images the Ebro Margin (NW Mediterranean), we identify a preserved canyon on a Middle Pleistocene paleo-surface and relate it directly to its modern form on the present-day seafloor. A subparallel stacking pattern of seismic reflections, similar to that seen between prograding clinoforms in intercanyon areas, is observed between the modern and paleo-canyon thalwegs. The concavity of the modern long-profile differs from the convex-concave long-profile on the Middle Pleistocene surface, suggesting a long-term change in canyon sedimentation. We interpret this change as shift to a canyon dominated by turbidity currents from one strongly influenced by the pattern of sedimentation that built the open-slope canyon interfluves. We uncover support for our interpretation in previous studies of the Ebro Margin.