Crustal temperature evolution of a thermally-relaxed rift system computed with the model setup of Jourdon et al. (2019) for the first 32.5 Myrs of rift evolution and thermal reequilibration replacing smooth plate boundary inversion and convergence for the last 60.25 Myrs of the simulation (Model B). The location of the fourteen upper crustal basement particles selected for forward modelling of low-temperature thermochronology data is indicated and initial position of the particles within the rift system is similar to that in Model A (Fig. 1).