Batobeleng Fisah Monareng, University of KwaZulu-Natal, Durban, South Africa, John W Geissman, University of Texas at Dallas, Department of Geosciences, Richardson, TX, United States, Gonasagren A Naidoo, University of KwaZulu-Natal, Geology, Durban, South Africa and Tesfaye K Birke, University of KwaZulu-Natal, School of Earth Sciences, Durban, South Africa