Abstract: Salt-Tectonics Provinces and Superposed Deformation Across the Continental-Oceanic boundary in Offshore Angola

Angolan margin is the type area for raft tectonics. New seis- mic data reveal the contractional buffer for this thin-skinned extension. A composite section hm the Lower Congo Basin and Kwanza Basin illustrates a complex history of superposed defor- mation caused by (1) progradation of the margin and (2) episod- ic Tertiary epeirogenic uplift. Late Cretaceous tectonic movement was driven by a gentle slope created by thermal subsidence. Extensional rafting took place updip, contractional thrusting and buckling downdip. Some distal folds were possibly unroofed to form massive salt walls.