Next Figure 11 is A SW to NE section linking the Coroni well on the shelf with the North Coroni well, drilled in a basinal setting. The contrast between the sand dominated shelf with the occasional carbonate development and the clay dominated sequence in the basin is striking. The flexure zone is highlighted in red. This section also illustrates the important outbuilding of the shelf.
In the Coroni well several carbonate sequences were drilled. The Eocene carbonate stands out as a high amplitude reflection.

Figure 12 shows a SW to NE striking section across the deep water realm of the Suriname offshore. Note the length of the profile as well as the time scale (down to 8.5 secs).
The anticlinal feature is mostly chaotic and underlain by flat events. It is interpreted that the the pelagic clay sequence became unstable and started to move, much like salt, into diapirs. Movement continued until present as can be noted from the distortion of the sea floor. Of note is the chaotic sequence intercalated in the younger series.

Figure 13 elucidates the transition from the Demerara Plateau to the deep water realm of the Basin.
The Demerara high is is located on the SE side of the section. It is characterised by a well stratified mildly folded sequence (Demerara-1 penetrated Early Cretaceous carbonates) underlying a hardly structured Late Cretaceous to Tertiary sequence (from the Break-up unconformity onwards). Towards the basin the sequence steps down through a series of faults. This fault system represents a boundary fault system within the initial graben system. The actual rift boundary, i.e. the prolongation of the rift boundary faults on the shelf remained on the African continent. Half way the section, the continental crust may change into oceanic crust.

 
Figure 14  is a 3D image of the Base Tertiary Unconformity.
Vertical exaggeration 25 x. It illustrates the undisturbed shelf, the terrace of the Demerara high and the dramatic drop into the deep pull-apart basin. Also note the anticlinal feature in the basin (clay diapir?).