The Paul W. Gast Lecture Series honors the Geochemical Society's first Goldschmidt Medalist. The lecture is awarded to a mid-career scientist (under 45 years old) and is presented at the GS/EAG annual Goldschmidt Conference. Lecturer selection alternates between the GS Board of Directors and the EAG Council depending on the location of the Goldschmidt Conference.
| Year | Lecturer | Title |
| 2008 |
Jerome Gaillardet |
Direct coupling between chemical and physical erosion rates in the West Indies |
| 2007 |
Kathrine H. Freeman |
Molecular and Isotopic Proxies--from Microbes to Mountains |
| 2006 |
John Eiler |
Clumped isotope geochemistry |
| 2005 |
Eric Oelkers |
Mineral Surface Reactivity from the Global to the Atomic Scale |
| 2004 |
Peggy O'Day |
Cheeseburger in Paradise: Nutrients, Contaminants, and Cycling Across the Abiotic-Biotic Divide |
| 2003 |
Hiroshi Ohmoto |
Chemical and Biological Evolution of the Early Earth: A Minority Report |
| 2002 |
Patricia Dove |
Deciphering the Physical Basis of Biomineralization through the Lens of Mineral Assembly |
| 2001 |
Don DePaolo |
Ca Isotope Geochemistry |
| 2000 |
Jill Banfield |
|
| 1999 |
Bernard J. Wood |
Trace Element Partitioning: A Blunt Geochemical Instrument |
| 1998 |
Everett Shock |
|
| 1997 |
Edouard Bard |
Geochemical and Geophysical Implications of the Radiocarbon Calibration |
|
