Published online by Cambridge University Press: 01 May 2009
At the International Geological Congress held in Sydney, Australia, in August 1976 a Symposium of papers and discussion on ‘The Precambrian–Cambrian Boundary Problem’ was organized by the author in his capacity as Project-Leader/Chairman of the international Project 29 Working Group on the Precambrian–Cambrian Boundary. The following seven papers arose from this symposium. Project 29 is part of the current research under the auspices of the International Geological Correlation Programme (I.G.C.P.). which is sponsored jointly by the United Nations Educational. Scientific and Cultural Organization (U.N.E.S.C.O.) and the International Union of Geological Sciences (I.U.G.S.).