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Figure 5. Sequential palinspastic sections extracted from the restored 3-D models depicting the structural evolution of the fold. Sections were extracted from the 3-D model parallel to the maximum shortening direction (189o). The cross sections have no vertical exaggeration. (a) Present-day geometry. (b) Restoration of the Base Tertiary surface. (c) Restoration of the Top Campanian surface. (d) Restoration of the Top Santonian surface. (e) Restoration of the Near Base Cretaceous (or "Base Santonian") surface. (f) Restoration of the Base Cretaceous surface. (g) Plot of shortening versus geological age taken from restorations shown in (a-f). Age data are based on Harland et al. (1989). Note that the absolute age for the "Near Base Cretaceous" horizon has been taken to represent the Base Santonian (97 Ma).