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Detailed study of exploration wells penetrating the Wilcox interval in the Walker Ridge and Keathley Canyon protraction areas, Gulf of Mexico, support the presence of an extensive, correlative, Wilcox depositional system. They also reveal differences in structural styles and timing of formation. While mobilization of the Jurassic autochthonous salt layer results in many deep structures, their evolution and style varies across the region. South of Green Knoll in Walker Ridge, the structural style exhibits characteristics of compression and inflation, and greatest growth is in the middle to late Miocene. This style transitions into structures along remnant polygonal salt ridges resulting from evacuation of the autochthonous salt layer into the allochthonous salt canopy during the middle to late Miocene. Farther west into Keathley Canyon, earlier salt movement, possibly generated by up-dip Oligocene extension, creates structures along remnant salt ridges associated with salt evacuation and inflation.

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