Fig. 5 

Detailed Geological Map of the study area, projected in the CH1903 + LV95 coordinate system. Based on the stratigraphic compilation (Fig. 3), the two existing vector maps of the BRGM (Egal, 2007; Nagel, 2007) have been harmonized. Based on Rusillon (2017) and Brentini (2018), the lithological legend, used here, follows the swiss HARMOS formations. New dip data from fieldwork and wells used for building the cross-section have been located on the map. The wells names are the: GEo-1, L-112, SPM-1, SPM-2, SPM-3, G1, F1, F2, F3. This resulting harmonization helped to well constrain the surface structures of the initial cross-section (Fig. 7). The bold black line corresponds to the initial and the final cross-section of this study (Figs. 7, 11). The section trace with a calculated best-fit orientation crosses four major thrusts (Reculet, Crêt Chalam, Tacon and Bienne Thrusts) and ends in the north-west at the front of the Oyonnax Backthrust. The cross-section avoids the major strike-slip faults in order to have a balanced kinematic 2D forward model