ABSTRACT
The first general description and map of the geology of the Sudan was that given by Dunn in Bulletin No. 1 of the then Geological Survey of the Anglo-Egyptian Sudan. The oldest rocks in the Sudan are loosely referred to as the Basement Complex, and a Precambrian age is implied. There is reason to suspect that the gneisses making up the Nile-Congo watershed along the south-western borders of the Sudan adjacent to Central African Republic and Zaire might also be Archaean, although there is little direct evidence in the Sudan for this. One area in the Sudan has been considered to contain Middle Proterozoic or older age rocks, and that is the Red Sea Hills province of NE Sudan between the Egyptian and Ethiopian borders. Geological events during the Palaeozoic in the Sudan are relatively sparsely recorded.
