The cooperation of members of the SEG could be of value to those involved with one program of the U.S. portion of the International Geodynamics Project—the endeavor to map the layers of the deep crust and upper mantle in areas of geologic interest. The Geodynamics Project, designed to exploit the many opportunities for new insights resulting from recent advances in earth science, is an international program of research on the dynamics and dynamic history of the earth with emphasis on phenomena that affect surface or near-surface processes and structures. There are 49 countries participating, each with its own program. The development of the U.S. program is in the hands of the U.S. Geodynamics Committee, which was established in the National Academy of Sciences under the Geophysics Research Board with the support of the National Science Foundation. A report with full details of the organization, research objectives, and participants has been published and is available from the National Academy of Sciences.