Compresión Cenozoica en la Cuenca de la Unión y Monte Submarino Armoricano (Llanura Abisal de Vizcaya)
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AuthorsMedialdea, T.; Somoza-Losada, L. (Luis); Bohoyo, F.; Vázquez, J.T. (Juan Tomás); Patriat, M.; Thinon, I.; Vegas, R.; Ercilla, G.; León, R.
Cuenca de la Unión
Golfo de Vizcaya
A multidisciplinary study was carried out in the area of the Celtic Sea and the Bay of Biscay to elaborate the Joint Submission of France, Great Britain, Ireland and Spain tothe United Nations in support of the establishment of the outer limits of their continental shelf. As part ofthe study an oceanographic survey was carried out during which geophysical data was acquired in the Union Basin, located betweenthe Charcot Seamounts to the south and the Armorican Seamount to the north. The Pyrenean deformation phases affected not only the continental domain of the Bay of Biscay but also the oceanic domain. The Union Basin is characterized by an intense deformation mainly developed during the Eocene phase that affects the sedimentary cover and the oceanic basement. The structures generated by the compressive events consist of folds and reverse faults, small domes and diapirs in the basal unit of “Black Shales” as well as sedimentary instabilities.