Harold C. (Hal) Helgeson, professor at the University of California, Berkeley, was widely regarded as the preeiminent practioner of theoretical geochemistry for more than 40 years, a career he embraced after a colorful set of experiences in the military and the mining industry.
Harold C. (Hal) Helgeson (November 13,1931--May 28,2007) was a professor at the University of California, Berkeley. He was widely regarded as the preeiminent practioner of theoretical geochemistry for more than 40 years, a career he embraced after a colorful set of experiences in the military and the mining industry.