Mark Williams has served on the council of the Palaeontographical Society both as an editor and vice-president. Currently he is a member of the United States Geological Survey 'PRISM paleoclimate group', the Anthropocene Working Group of the International Commission on Stratigraphy, and the Stratigraphy Commission of the Geological Society of London. He is special publications editor for The Micropalaeontological Society.
readable and absorbing account Guardian, Devorah Bennu exhilirating foray Barbara Kiser, Nature