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Abstract

abstract

Advances in geological and geophysical research in Antarctica and the Southern Ocean have contributed to an understanding of crustal evolution. Petrologic and structural studies of magmatic, metamorphic and sedimentary sequences have provided a more detailed base for geological correlations between western Dronning Maud Land and south-eastern Africa. Airborne geophysical surveys have identified prominent magnetic anomalies similar to those previously recognised in southern Africa, which corroborates these findings. Isotopic analysis has shown considerable similarity in the chronostratigraphy of the two continents. Marine geophysics and geochemical studies of ocean floor basalts have contributed to the elucidation of the spreading history and evolution of the Southern Ocean.