Fig. 1

Tectonic map of the arc of the Western Alps after Schmid et al. (2004) and Bousquet et al. (2012b) with indication of the traces of the profiles depicted in Fig. 2. The selected faults indicated in red are: RSL Rhone-Simplon Line, PL Periadriatic Line, PF Penninic Front, ACL Argentera-Cuneo Line, AFSV front of the metamorphic core of the Alps and Sestri-Voltaggio line, VVL Villalvernia-Varzi line. Abbreviations in black are: LA Ligurian Alps, TH Torino hills, MH Monferrato hills, GB Giudicarie transpressive belt