Fig. 6.40. Cross-sections and illustrations of the modes of petroleum entrapment in deltas. Note that the alluvial pinch-out (A) is a simple stratigraphic
trap. Types (B) and (C) are combined stratigraphic and structural traps. Types (D) and (E) are both contingent on the presence of overpressured
muds in the distal part of the delta. Examples of each type of trap are cited in the text.