Fig. 12

a A tentative paleotectonic frame for late Palaeozoic in Tuscany showing the linked transtensional setting with pull-apart basins in the “intermediate” Tuscan domain and the “hidden” East Tuscan Fault whose remnants in terms of basement and cover may be found in subsurface in the northern (Pontremoli) and southern Tuscany (Larderello, Amiata). Also represented the possible trends of Permian basins in Tuscan and Umbria-Marche domains (Rau and Tongiorgi 1974; Scisciani et al. 2014); b geological sketch (not to scale) illustrating the inferred tectonic context of the late Palaeozoic tectonics in Tuscany. Pull-apart basins developed in splay structures of a major regional fault whose mid-crustal relict remnants may be found in Pontremoli and Larderello deep well with their Carboniferous-Permian cover in the M.Amiata subsurface occurences