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Crustal structures in central southern Africa


WE announce preliminary results from the geophysical reconnaissance of Botswana carried out during 1972 and 1973. Tertiary to Recent sands and sediments in the Kalahari Basin totally obscure the solid geology over 70% of the country, but these new results give exciting first indications of the disposition of geological features in the concealed ‘basement’ when related to the better known geology of the surrounding territories. The new data also suggest the extent of the concealed sedimentary and volcanic strata of Karroo age, and their possible relationship to the recent, if slight, tectonic instability in the heart of the continental plate. This work forms part of Botswana's contribution to the International Geodynamics Project1.

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    Report No. 3, Inter-Union Commission on Geodynamics, 160 Botswana, (1972).

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