Luke N J Wedmore¹, Juliet Biggs², Jack Nicholas Williams³, Ake Fagereng⁴, Zuze Dulanya⁵, Hassan S. Mdala⁶ and Felix Mphepo⁶, (1)University of Bristol, Bristol, BS8, United Kingdom, (2)University of Bristol, COMET, School of Earth Sciences, Bristol, United Kingdom, (3)University of Otago, Dunedin, New Zealand, (4)University of Cape Town, Department of Geological Sciences, Cape Town, South Africa, (5)University of Malawi, Geography and Earth Sciences Department, Malawi, (6)Geological Survey of Malawi, Zomba, Malawi