Acoustical logging Applications Basement Bathymetry Buchan Field Clastic rocks Continental crust Crust Cyclic processes Devonian Environment Ferrar Group Flexure Fluvial environment Free-air anomalies Gamma-ray methods Geophysical methods Geophysical surveys Gravity anomalies Gravity methods Isostasy Jurassic Karoo Supergroup Lithofacies Lithosphere Magnetic anomalies Mantle plumes Mesozoic Oceanic crust Offshore