01634nas a2200277   4500000000100000008004100001260002400042653003600066100001400102700001200116700001600128700001400144700001500158700001600173700001900189700001300208700001600221700001900237700001300256245011300269856005100382300001000433490000700443520088400450020002201334       2007                            d  bSpringeraDordrecht10aEarth and Environmental Science1 aR. Arzola1 aR. Wynn1 aD.G. Masson1 aP. Weaver1 aG. Lastras1 aV. Lykousis1 aD. Sakellariou1 aJ. Locat1 aV. Lykousis1 aD. Sakellariou1 aJ. Locat00aLandslide And Gravity Flow Features And Processes Of The Nazar\ e And Set\ ubal Canyons, West Iberian Margin  uhttp://dx.doi.org/10.1007/978-1-4020-6512-5_10  a89-980 v273 aThe Nazar\ e and Set\ ubal Canyons of the west Iberian margin are highly complex seafloor environments, displaying a range of sedimentary features and processes that reflect the transition from erosive upper to depositional lower canyon. Upper sections are characterised by a deeply incised, narrow, V-shaped thalweg, and frequent localised intra-canyon slope failures. Lower sections have a U-shaped floor with heterogeneous sediment distribution. Two types of gravity flow are observed: thin-bedded, finegrained deposits that may be the result of frequent turbidity currents generated by high sediment supply to canyon heads, and thicker, siliciclastic coarse sandy turbidites, probably generated by larger earthquake-triggered slope failures on much longer timescales. Our results highlight the complex interplay of sedimentary processes operating within major canyon systems.  a978-1-4020-6512-5