The Colloquium of African Geology (CAG) is a major biennial meeting, held under the auspices of the Geological Society of Africa (GSAf). Launched in Europe in 1964 at the University of Leeds (England), it was called into being by Professor W. Q. Kennedy and Dr Tom Clifford, themselves notable experts in the field of African geology, to provide a platform for earth scientists from around the globe engaging in research on the African continent to gather and exchange information and ideas. Since then, CAG has grown exponentially and become a forum not only for academics but for exploration geologists, mineral economists, IT specialists and a host of others, covering the entire spectrum of geoscientific applications and supporting services. Of the 28 events held to date, 18 were staged in Europe, while 10 were hosted by various African countries, i. e. South Africa, Ethiopia, Tanzania, Zimbabwe, Nigeria, Mozambique, Swaziland, Morocco (twice) and Tunisia.