Views and interpretations of trenches and ground penetrating radar (GPR) results. (A and B) T1 southern wall exhibiting reverse faulting of upper layers by a low-angle plane, rooted in a preexistent fabric in metamorphic bedrock. (C and D) The T1 southern wall highlights previous ductile and brittle deformation. (E) View of the scarp and colluvium in the eastern wall of T2. (F) Fault trench log for the eastern wall of T2 showing flexure with no faulting. (G) GPR Line 02 (location in Fig. 2E), highlighting a low-angle south-dipping reflector. SR—surface rupture.