Figure 31-Reconstruction of a regional cross section across the Wilcox, upper Eocene, and Frio fault systems, onshore central Texas. The Wilcox fault system is perched above autochthonous salt (black). The Frio-age growth faults are interpreted to sole into an evacuated Paleogene canopy now forming the Oligocene-Miocene salt-based detachment that continues offshore (Figure 24). LK = Lower Cretaceous. See Figure 2 for location.