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Tectonic classification of Cenozoic Iberian foreland basins Vicente Muñoz, Gerardo De Cloetingh, S. Van Wees, J.D. Cunha, P.P. The Iberian microcontinent stands out because of its intense Alpine intraplate deformation. This is reflected in a large number of Cenozoic basins of very different sizes. Most of the contacts between topographic highs and basins are thrust or strike-slip faults. All these basins seem to have undergone a common sedimentary evolution, comprising four stages: initiation of sedimentation, intense syn-tectonic infilling, change from endorheic to exorheic drainage, and accelerated erosion related to fluvial incision. This simple evolutionary model shows a migration from East to West, in which basins are still tectonically active at the Atlantic margin of Iberia. This common evolution is also found in a series of geometrical characteristics, such as the ratio r of length of strike-slip fault and length of thrust fault, that are very similar in both types of basin border settings. Thrust-related basins are mainly associated with segmented pop-downs, whereas the main basins have the characteristics of open-ramp basins. Strike-slip related basins are mostly transpressive structures, although small pull-apart basins are usual along the Vilariça and Messejana faults. For basin areas larger than 100– 1000 km2, a constant r value of 0.6 is found (including the Ebro, Duero, Madrid, Lower Tagus and Badajoz basins). Within the Iberian microcontinent, the total amount of Cenozoic contractional deformation was distributed between strike-slip and thrust faults with an r ratio close to 0.6. However, for small basins this parameter seems to depend on the type of fault, range or deformation belt (pure strike-slip, transtension, transpression, and pop-up) independently of its local tectonic development. 2023-11-07T18:46:45Z 2023-11-07T18:46:45Z 2023-11-07T18:46:45Z 2011 journal article https://hdl.handle.net/20.500.14352/88631 XXXX-XXXX 10.1016/j.tecto.2011.02.007 eng info:eu-repo/grantAgreement/CSD2006-00041 info:eu-repo/grantAgreement/CGL2006-13926-C02-01-02 De Vicente, G., et al. «Tectonic Classification of Cenozoic Iberian Foreland Basins». Tectonophysics, vol. 502, n.o 1-2, abril de 2011, pp. 38-61. DOI.org (Crossref), https://doi.org/10.1016/j.tecto.2011.02.007. restricted access Elsevier