The salt tectonics of the lower slope of the northwestern Gulf of Mexico (GOM) in the Keathley Canyon and Walker Ridge protraction areas (Fig. 1) involves the interaction of allochthonous salt with its attendant cover, creating a range of map-scale geometries due to the kinematics of contraction, extension, and growth. Depth-converted structure mapping on a regional scale documents withdrawal basin morphology and trends formed during the evolution of major salt lobes in the mid to late Tertiary period. These observations aid exploration efforts in regions dominated by mobile salt in the GOM. The Sigsbee salt province serves as a data-rich analog for other salt provinces world-wide.