
Structural interpretation of the thrust belt (A), offshore Namibia, and restoration (B) used to estimate the amount of stratal shortening represented in the contractional domain. The section is shown with no significant vertical exaggeration (assuming a seismic velocity of 2.7 km/s). Thrusts are numbered for reference and do not imply a sequence of formation. The deformed distance between the pin line and trail line 2A (blue horizon) is 58.5 km; its restored equivalent distance is 77 km, so the net contraction is 18.5 km. The deformed distance between the pin line and trail line 2B (green horizon) is 60 km; its restored equivalent is 85 km, so the net contraction is 25 km.