Bachelor of Science in Geology, California Institute of Technology, Pasadena, California, 1957; Master of Science in Geology, California Institute of Technology, Pasadena, California, 1961; Doktortitel in Geochemistry, California Institute of Technology, Pasadena, California, 1963; Semifinalist bei der Astronautenauswahl der NASA-Gruppe 4; NASA Assistant Director for Space Science (1993-1996); seit 1997 Adjunct Professor, Rice University, Houston, Texas.