A: Surface topography (in meters) along the westernmost Pyrenean transect (Fig. 3B) which crosses from south to north the South Pyrenean Zone (SPZ), Axial Zone (AZ), North Pyrenean Zone (NZ) and Aquitaine Basin (AB). B: Section of migrated receiver functions. The Iberian and European Moho are delineated with black lines. The grey lines mark the seismic interfaces characterized by a negative downward velocity jump. C: V_s (top) and D: V_p (bottom) models (in m/s) obtained by full waveform inversion of teleseismic P waves. The thin black lines in C propose a preliminary geological interpretation of the tomographic model (from Wang et al., 2016).