Physiography and deposition on a distal deep-sea system: The Valencia Fan (Northwestern Mediterranean) |
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Authors: | Andrés Maldonado Alberto Palanques Belén Alonso Kim A Kastens C Hans Nelson Suzanne O'Connell William B F Ryan |
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Institution: | (1) Instituto Jaime Almera, C.S.I.C., Apto. 30102, 08028 Barcelona, Spain;(2) Lamont Doherty Geological Observatory, 10964 Palisades, NY;(3) U.S. Geological Survey, 94025 Menlo Park, CA |
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Abstract: | The Valencia Fan developed as the distal fill of a deep-sea valley, detached from the continental slope and the main sedimentary source. A survey of side-scan sonar, Sea Beam and reflection seismics shows that the sediment is largely fed through the Valencia Valley. The upper fan comprises large channels with low-relief levees, and the middle fan has sinuous distributary channels. Depositional bedforms predominate on the valley floor and levees, and erosional bedforms are common in the valley walls. A change to slope on the fan apex and the presence of volcanoes on the upper fan are the main factors influencing fan-growth pattern. |
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