Supplementary Material

Table S1: Depth of the base of Pliocene in boreholes or outcrops. Depth values are in meter.

Figure S1: Location of seismic lines studied on a simplified geological map, in addition to boreholes used for analysis and construction of the MES model (see Table S1).

Figure S2: Stack in time after conventional processing.

Figure S3: Final interval velocity model.

Figure S4: RMS velocity model derivated from the time based interval velocity model that has been tested in a stack process to validate its reliability.

Figure S5: Stack with « deep » statics in time → improvement of the quality of the stack under the Paleo-Ardéche canyon.

Figure S6: Comparison of the MES surface at depth from Roure et al. (2009) and our new model of the MES at depth. We used the same color-scales for both maps. Note the different course of the ardéche and Rhône rivers.

Figure S7: Uninterpreted seismic lines used in this manuscript.

© D. Do Couto et al., Published by EDP Sciences 2024