Geological Society of London 1964 time scale and its 1971 supplement. In the influential A Geologic Time Scale 1982, second edition 1989, the chronometric scale, based on units of duration, is calibrated with the chronostratic scale, based on a scale of rock sequences with standardised reference points, to form the geochronogic scale. He was a key protagonist of the International Geological Correlation Programme (IGCP) and was its first secretary from 1969 to 1972, when a professional secretariat in UNESCO took over. He was committed to raising standards of scientific clarity and precision and on standardising the international chronostratic scale. Arising out of this he initiated two projects: the Precambrian Cambrian Boundary Project and the Pre-Pleistocene Tillite Project, which concluded with a volume of over 211 contributions. His prime stratigraphic interest was the working group on Terminal Precambrian systems with their tillites. He was Chairman of the Stratigraphy Committee of the Geological Society of London (GSSC) 1969-1973 and served on the International Sub-commission for Stratigraphy Classification (ISSC). Earth science publications Apart from being a prolific writer and collaborator himself, Harland promoted and facilitated the publication of geological research. For over 30 years from 1956 to 1988, he edited the Geological Magazine: the international journal published bi-monthly by the Cambridge University Press. As Honorary Secretary of the Geological Society of London from 1963 to 1970 he led plans for the Society to become a centre for collaborative research. He initiated a series of multi-contribution books, which led to the Society's flagship series of Special Publications that had by his death in 2003, produced more than 200 volumes. From 1966 to 1981 he was Chairman of the Editorial Board of the Earth Science Series at Cambridge University Press, and continued on the Board until 1986. Administration Harland was thoroughly involved in administration throughout his career. He was secretary of the Department of Geology, later University of Cambridge Department of Earth Sciences from 1946 to 1966, and undertook all aspects of administration for two Woodwardian Professors Woodwardian Professors, W.B.R.King and Oliver Bulman. From 1947 to 1964 he served on the Board of Faculty of Geography and Geology and also the Degree Committee and Appointments Committee at the University. He served on the Scott Polar Research Institute, Committee of Management from 1953 to 1957, when it was taken over by the University, and then continued to serve on its advisory committee. He was Librarian at