Education: B.S., Natural Science, Cambridge University, 1958 Ph.D., Department of Geodesy and Geophysics, Cambridge University, 1961 Positions: Scripps Institution of Oceanography, Postdoctoral Fellow, 1961-62. Gulf Research and Development Laboratory, Research Geophysicist, 1962-65. University of Pittsburgh, Associate Professor, 1965-68, Professor, 1968-74, (Chair, Department of Earth & Planetary Sciences, 1966-1972). University of California, Santa Barbara, Professor, 1974-1994 (Chair, Department of Geological Sciences, 1986-1991). Professor Emeritus University of California, Santa Barbara, 1994- Research Professor, University of Hawaii, HIGP-SOEST, Senior Researcher 1997-2010HIGP Affiliate 2010