Title | Landslide And Gravity Flow Features And Processes Of The Nazaré And Setúbal Canyons, West Iberian Margin |
Publication Type | Book Chapter |
Year of Publication | 2007 |
Authors | Arzola, R, Wynn, R, Masson, DG, Weaver, P, Lastras, G, Lykousis, V, Sakellariou, D, Locat, J |
Editor | Lykousis, V, Sakellariou, D, Locat, J |
Book Title | Submarine Mass Movements and Their Consequences |
Series Title | Advances in Natural and Technological Hazards Research |
Volume | 27 |
Pagination | 89-98 |
Publisher | Springer |
City | Dordrecht |
ISBN Number | 978-1-4020-6512-5 |
Keywords | Earth and Environmental Science |
Abstract | The Nazaré and Setúbal 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. |
URL | http://dx.doi.org/10.1007/978-1-4020-6512-5_10 |
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