Seismic salt-analog structure. (A) Seismic cross-section from Rowan et al. (2016), showing a putative geometry for the Kef N’Hal structure, before compression and squeezing leading to weld formation. White arrow show the equivalent position of southern flank of Kef N’Hal weld. (B) Extract of cross-section by Kergaravat et al. (2016) showing the squeezing and inversion of a salt limit between two minibasins. This geometry could likely account for the geometry now observed at the SAK. Black arrow shows the equivalent position of the SAK flap, i.e., the pre-Aptian layers grouped in a flap south of the weld (see Figs. 2 and 15A). (C) Examples of recumbent geometries that could explain the GP deformation during Aptian-Albian (slightly modified after Dooley et al., 2015). On the left, the result of an analog modeling. On the right, the reproduction of a seismic line from the Santos Basin.