OSSERVAZIONI PRELIMINARI SULL'EVOLUZIONE MORFOSTRUTTURALE DEL BACINO DI CASTROVILLARI (CALABRIA SETTENTRIONALE)

Abstract

Plio-Quaternary clastic sediments, geomorphological fea­tures and recent brittle deformations of the Castrovillari Ba­sin in Northern Calabria have been studied on the grounds of a wide review of previous data and by means of a new survey. The research showed the existence of two different tectonic stages responsible for the genesis, the evolution and the disactivation of the basin. The reconstruction of three sedimentary sequences, separated by unconformities, allowed to ascribe those tectonic events to the Emilian and Sicilian (Lower Pleistocene). The first tectonic stage occurred under transtensive conditions, related to the kinematics of the Pol­lino left-lateral strike-slip fault, while the second one took place into an extensional strain field characterized by a counter-apenninic extension axis. Yet, both tectonic stages should be interpreted as a normai consequence of a continu­ous reorganization of the locai stress fields due to a rotational field acting along the Pollino Fault System.