Fig. 3

a Interpreted seismic section Crossline 315, passing through the Middle part of the study area and running NW–SE direction (Fig. 1). This section illustrates the two depositional sequences and their bounding sequence boundaries (DSB2 and DSB3). The lower sequence boundary (DSB1) is not recorded due to poor processing. b Geologic interpretation of the seismic section Crossline 315 reveals the different lithologic facies of the Miocene units of the two depositional sequences (for legend see Fig. 5)