The presence of shallow, tectonized salt is a major impediment to exploration efforts in many sedimentary basins, including the northern Gulf of Mexico. The salt there forms a shallow tongue of high-velocity material emplaced between lower-velocity Tertiary and Quaternary sediments. Using conventional seismic reflection techniques, explorationists often have difficulty identifying the base of the salt tongue. Only in a very few instances (e.g., Buffler, 1983; Buffler et al., 1978; Watkins et al., 1978) have they been able to identify the base of the shallow salt. Interfaces below the salt are even more rarely observed.