Graduated from the University of St. Andrews, Scotland after a four year Honours Geology degree course in 1959. Gained Ph.D. degree from University of Bristol graduating in geology and mineralogy in 1963. Joined Australia National University to work on isotope geochronology, 1963-65. Continued this work during a post-doctoral fellowship at the University of Leeds, 1965-68. Accepted Professorship at the Department of Geology, University of Florida, USA and later at the Department of Environmental Studies, University of Virginia, USA. On return to the UK in 1995 became interested in natural zeolites which led to current work on biological plant fertilizers at the Department of Earth Sciences, University of Cambridge.