Isopach maps of Priabonian (a) and of syn-rift (b) sequences in the Hérault basin, superimposed onto a simplified geological map (same legend as in Fig. 2, and location in Fig. 2). Contouring of depocenters in metres. The seismic profiles used in the study are represented in stippled green lines; plain green lines with labels correspond to the profiles shown in Figures 16 and 17. Faults are represented in red.