"The Geological Society of South Africa (GSSA) is a not-for-profit Scientific and Professional Society for earth scientists first established in 1895, and since regarded as the professional home for southern African geoscientists in academia, industry and government. It is the largest and oldest Society of its kind in southern Africa, and publishes a scientific journal, the South African Journal of Geology, as well as a quarterly news journal, Geobulletin. While the Society is focused on the African continent, the membership of the Society is global. New members from around the world are welcome to apply for membership."

http://www.gssa.org.za/index.html