Kimberlites, accelerated erosion and evolution of the lithospheric mantle beneath the Kaapvaal craton during the mid-Cretaceous - Brown, R.W.; Gallagher, K.; Griffin, W.L.; Ryan, C.G.; de Wit, M.C.J.; Belton, D.X.; Harman, R. (International Kimberlite Conference: Extended Abstracts, 1998)