Email: gjw@gps.caltech.edu

S.B., University of Chicago, 1951; S.M., 1952; Ph.D., 1954; D.h.c., University of Brussels; University of Paris; Sc.D.h.c., Arizona State University; D.Sc.h.c., University of Chicago; Dr.h.c., Rennes I University. Assistant Professor of Geology, Caltech, 1955-59; Associate Professor, 1959-62; Professor of Geology and Geophysics, 1963-82; MacArthur Professor, 1982-2001; MacArthur Professor Emeritus, 2001-. Chairman, Division of Geological and Planetary Sciences, 1987-89; Executive Officer for Geochemistry, 1987-89.

Application of chemical physics to problems in the origin and evolution of the earth and the solar system; study of radioactive dating and time scales for the transport of isotopes in natural waters.