Superposición de estructuras en el Anticlinal de Santa María de las Hoyas. Borde meridional de la Cadena Ibérica (provincias de Burgos y Soria)

Abstract

The Santa María de las Hoyas anticline is located in the southern front of the Iberian Chain in the limit of Burgos and Soria provinces. The the geological map and the cross-sections show a carbonated formations of the upper Cretaceous deformed by thrust sheets, faults and related folds with SW vergency, overthrusting onto Duero Basin. The oldest structures recognised are thrust sheets with SW tectonic transport direction.

Other set of the out of sequence thrusts and related folds deform the oldest thrust. The best represented tear fault is Espeja fault with dextral component. Lateral an oblique ramps are also recognised. The calculated shortening along the cross section A-A' is about 7 km, but very important variations in the shortening can be observed in other cross sections