Born in London 2 March 1926.
Studied geology in Belfast, received Ph.D. at the University of Leeds, 1956. His thesis topic concerned the Early Tertiary igneous rocks of Northern Ireland, in particular their hydrothermal alteration minerals.
Lecturer at Imperial College, London 1951-1978.
Geological research in Iceland 1955-1965. Visits e.g. in 1973, 1974, 1977, 1980, 1982, 1988, and 1995.
Geological research in the Azores, Italy, the Canary Islands, New Zealand, Indonesia and Hawaii.
After 1978 he lived in New Zealand, then went to Hawaii and moved back to Gloucester in 1996.
Walker passed away at the age of 78, 17 January 2005.