Neotectonic evolution and geomorphology of the Cascia and Norcia depressions (Umbria-Marche Apennines)

In this area, during the Plio-Pleistocene period, a low relief energy landscape (Paleosurface) was modelled, probably also in relation to climatic conditions favorable to areal erosion. The above paleosurface has subsequently (lower-middle Peleistocene) been uplifted and dislocated by normal faults connected with the presence of a tensional stress field. The extensional tectonic phase has continued up to the present time as demostrated by the direct faults, which dislocate the filling deposits of the depressions, and the seismic activity of the area, which fits very well the tensional type framework.