Fig. 6 

Differences between the single layer velocity model A and the multi-layered velocity model B on the seismic lines 81-JU-06 and 80-JU-01. The seismic traces are localized on Fig. 7. The multi-layered velocity model considers the duplication of the Mesozoic cover by applying three different velocities depending on the rheology. This method allows to have a more precise depth-converted seismic lines than simple conversion model and to well constrain the elevation of the horizons. C The seismic lines have been converted into depth by the multi-layered velocity model. 50 m depth difference is observed at the Near-Top Basement horizon between the two models (B). In this study, the more precise multi-layered velocity model has been used to interpret the seismic lines in the vicinity of the cross-section (Fig. 7). The major thrusts (Crêt Chalam, Tacon and Bienne Thrusts) have been built in the kinematic 2D forward model. Topo Topography horizon, NTDo Near-Top Dogger horizon, NTKeu Near-Top Keuper horizon, m.d. main décollement, NTBas Near-Top Basement, InPal Intra-Paleozoic