Fig. 1. The Gondwana supercontinent. West Gondwana is shaded in light blue and East Gondwana is shaded yellow. Neoproterozoic orogenic belts criss-cross the supercontinent. Those associated with the final amalgamation of the supercontinent are the East African orogen (red), the Brasiliano – Damara orogen (blue) and the Kuungan orogen (green). (For interpretation of the references to colour in this figure legend, the reader is referred to the web version of this article.)