Resumen de Desarrollo simultáneo reciente de pliegues y fallas en las Cordilleras Béticas: la Falla de Zafarraya y el Pliegue de Sierra Tejeda

Jesús Galindo Zaldívar, A.J. Gil, María J. Borque Arancón, Francisco González Lodeiro, Antonio Jabaloy Sánchez, Carlos Marín Lechado, Patricia Ruano Roca, Carlos Sanz de Galdeano Equiza

• The present-day relief of the Betic Cordilleras is the result of the interaction between kilometresized folds and faults that developed since the Late Miocene, by the oblique convergence between the Eurasian and African plates. Folds clearly determine the E-W orientation of the main mountain ranges and valleys in the central Betic Cordillera. Although faults have a complex kinematic evolution, the most abundant faults are normal, and NW-SE and E-W oriented sets are well developed.

  The study o f the Zafarraya fault and the Sierra Tejeda antiform, by field observations and the installation of a new GPS network, provides new data to discuss their relationships. The present-day NW-SE horizontal shortening is compatible with the development o f the NW-SE extensional fault system located in the southwest periclinal end of the folds. However, the simultaneous development o f E-W oriented normal faults and folds may be a consequence of the accommodation of blind thrust structures that join in a detachment level where most o f the seismicity of the region is concentrated.