Abstract
The misfit problems raised by the pre-drift reconstructions of the South and Equatorial Atlantic compel us to resort to intraplate deformations. It is shown that acceptable deformations of the African plate in line with the Benue Trough and the Transafrican rifts and shear zones provide a far from satisfactory solution to the geometrical misfit problems in the South Atlantic. These problems can instead be alleviated by considering a degree of deformation of the South American plate along an intraplate boundary in line with the Parana Province, the Rio Grande Rise and the Walvis Ridge. In spite of the scarcity of field observations in this area of South America, we show that such a deformation cannot be ruled out, but it will have to be associated with deformations in the Equatorial Atlantic and in other areas of the African and South American plates.
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