Abstract:The mode of emplacement of the dolerites and their relation with the overlying basalts are revisited in the light of new information provided by a recent resistivity study of the structure of the Karoo basin and augmented by an analysis of age and palaeomagnetic data. The different styles of intrusion from the bottom to the top are explained in terms of anisotropy, lithology and increasing upward bending stresses accompanied by a decrease in overburden thickness. The lowermost zone 3 consisting of flat lying d… Show more
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