Three structural traps A, B C, in a Miocene Gulf of Mexico deltaic sequence. A and C are downthrown closures set up by large south-dipping normal faults. B is an upthrown closure against two intersecting north-dipping fault. Notice that the downthrown closures do not show any amplitude signature. The upthrown closure has a well-developed amplitude anomaly with excellent structural fit. All three traps have been drilled: the downthrown traps are wet, while the uptrown trap has gas pay.