The Angolan Mesozoic volcanic suites are concentrated along the continental margin and are charac terized by voluminous sheet-like acid rock-types overlying stratoid tholeiitic basalts. The acid volcanics closely correspond in terms of stratigraphy, petrology and Sr-Nd isotope compositions to those of Lower Cretaceous age (135 ± 3 Ma) in the northem Parana basin (SE-Brazil). The Mesozoic tholeiitic volcanic suites of Angola (and Namibia), which crop out close to the continental margin represent the easterly extension of the vast volcanic activity of the Parana basin which occurred before the opening of the S. Atlantic ocean.
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