(a) Present day isodepth map to base of syn-orogenic sediments in km in the onshore Ebro and Aquitaine basins compiled from Angrand et al. (2018) for the Aquitaine basin and Garcia-Castellanos et al. (2003) for the Ebro Basin. (b) Total and tectonic synorogenic subsidence curves for ten boreholes in the central and eastern Aquitaine basin. Boreholes are located in (a). Data compiled from Grool et al. (2018; 1–4), Ford et al. (2016; 5–8) and Rougier et al. (2016, 9–10) where details of data and calculations can be found. (c) Total and tectonic synorogenic subsidence curves for seven boreholes in the eastern Ebro basin (for details see Grool et al., 2018). Boreholes and stratigraphic logs used in these calculations are located in (a). The orogenic stages of early convergence, quiescence (stasis) and main collision are indicated by colored bands on the graphs. For abbreviations see Figure 3 caption.