http://www.cag23.co.za/ Colloquium of African Geology Johannesburg, South Africa January 8-14, 2011 Scientific Program [snip] Session S3 (special): Geodynamic of Africa and contiguous parts of Gondwana. A tribute to Prof. T. Clifford, Wits, South Africa [snip] * S3.7 African meteorites and impact craters