GEOMORPHOLOGICAL SUBMARINE FEATURES IN THE MENORCA CHANNEL (WESTERN MEDITERRANEAN)
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AuthorsPalomino, D. (Desirée); Martínez-Carreño N., N.; Díaz, D. (David); Ramírez-Amaro, S.(Sergio); Farriols, M.T. (Maria Teresa); Marcos-Herrero, E. (Elena); Fernandez-Arcaya, U. (Ulla); Muñoz-Caballero, A. (Anabel); Mallol, S. (Sandra); Díaz, J.A. (Julio); Ordines, F. (Francesc); de la Ballina, N.(Núria); Vázquez, J.T. (Juan Tomás); Massutí, E. (Enric)
Keywordsgeomorphology, carbonated sediments, sedimentary processes, Menorca Channel, Balearic Island
Based on geophysical (multibeam echosounder and very high resolution parametric profiles) and sedimentological (Shipek dredge) data acquired during the INTEMARESCANAL0419 expedition, different geomorphologic features have been identified. The study area is located in the continental shelf of the Menorca Channel between 37 and 116 m water depth (mwd). Shallower zones are dominated by lense shaped bedforms, up to 1 m high. They are characterized by very low backscatter values. Also small circular -or slightly elongated- mounds are very frequent morphologies occurring up to 100 mwd. Their sizes range from 1 to 5 m high and 20 to 80 m of diameter with high backscatter values. The most prominent morphological features at intermediate depths are a set of channels that dig in the shelf from 60 to 90 mwd. They show vertical walls and extend up to several km. In the parametric profiles, paleochannels filled by a sedimentary layer approximately 30 ms (two-way time) thick can be observed. ...