GNGTS 2014 - Atti del 33° Convegno Nazionale

Fig. 1 – a) Bathymetry of the Paola Ridge, seismicity is from Castello et al. (2006) and focal mechanisms are from Pondrelli et al. (2006). Information about symbols and features are provided in the legend. b) Geodynamic setting of the study area. first with the aid of only full-ocean depth multibeam and backscatter data (Gamberi and Rovere, 2010). The Paola Ridge is a NNW-SSE 60-km-elongated anticline that confines the Paola Basin westward. The Paola Basin lies at the rear of the Calabrian Arc, in the upper plate of the Ionian subducting slab (Faccenna et al. , 2011), and formed due to the extensional tectonics that led to the opening of the Tyrrhenian Sea (Fig. 1b). On land, the Calabrian Arc is dissected by extensional fault zones (Van Dijk et al. , 2000) and rift basins such as the Crati Graben (Fig. 1a), with ≈ 1 mm/yr E-W-oriented extension rate (D’Agostino et al. , 2011). 170 GNGTS 2014 S essione 1.2