Deformaciones neotectónicas en la Zona Transicional de la región del Banco de Galicia
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AuthorsVázquez-Garrido, J.T. (Juan Tomás); Ercilla, G. (Gemma); Medialdea, T.; Somoza-Losada, L. (Luis); Bohoyo, F.; Estrada, F.; León, R.
Multichannel high resolution seismic data acquired during the ERGAP 1 and ERGAP 2 allowed the interpretation of a set of NW-SE to N-S morphological features, mainly ridges, scarps and depressions, recognized in the multibeam data. These features correspond to structures of deformation (faults and folds) that have been developed over the most recent sedimentary units defined in this margin. The Unit 3 has worked as a viscous layer, favouring the upper units deformation and decoupling their deformation from basement structures. The deformation of these units must be considered as the results of a factors addition: i) the presence of viscous layers in the base of postrifts units and ii) the deformation of the margin along Cenozoic Pyrenean compressive phases that has flexured the basement and the margin physiography, generating gravitational gradients, and reactivated basement structures.