P.G. Eriksson, D. Twist, C.P. Snyman and L. Burger 454 The setting of mineralization in a portion of the Eersteling goldfield, Pietersburg granite-greenstone terrane, South Africa C.L. Byron and J.M. Barton 463 Siesmicity and plate boundary evolution in southeastern Africa CJ.HHartnady 473 Geology, geochemistry and mineralisation of the Erongo Volcanic Complex, Namibia F. Pirajno 485 Clay miner...

Palaeomagnetism of climatically sensitive sedimentary rock types, such as glacial deposits and evaporites, can test the uniformitarianism of ancient geomagnetic fields and palaeoclimate zones. Proterozoic glacial deposits laid down in near-equatorial palaeomagnetic latitudes can be explained by ‘snowball Earth’ episodes, high orbital obliquity or markedly non-uniformitarian geomagnetic fields. ...