Evidence for slope instability and current-induced sediment transport,the RMSTitanic wreck search area,Newfoundland rise |
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| Authors: | P Cochonat G Ollier J L Michel |
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| Institution: | 1. IFREMER (Institut Fran?ais de Recherche pour l'Exploitation de la Mer), Centre de Brest, BP 70, 29263, Plouzané, France
2. IFREMER, Centre de Toulon, BP 330, 83507, La Seyne, France
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| Abstract: | The first map of the sea bed morphology and sedimentary features within the RMSTitanic search area is proposed from the interpretation of SAR side-scan sonar images. Downslope sedimentary features such as erosional
furrows and crown scarps constitute a 7 km wide instability corridor. A large field (15 km2) of asymmetrical sediment waves indicating a downslope transport is identified. Current-induced features corresponding to
associated sand ribbons and barchan dunes resulting from the Western Boundary Undercurrent action are mapped. The morphology
of theTitanic Canyon is also precised from the SAR images. Finally, the origin of the sea bed features is discussed in an attempt to link
each bed form to a sedimentary process. |
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