The MAMBA geophysical project aims to explore the ocean-continent transition at the passive continental margin of Namibia, just south of the Walvis Ridge. This continental edge shows typical phenomena of volcanic margin formation, including flood volcanism, intrusions of continental crust by ring complexes, and dike swarms. The continental breakup and related magmatism was probably influenced by pre-existing Pan-African structures. Controversy exists on the nature of the ocean-continent transition in terms of its location, the width of the rifted zone, the degree of thinning of continental crust, and the magmatic impact.