Membership The USNC/IUGS roster includes scientists drawn from academia, research, government, and industry who have expertise in a variety of geological disciplines and have received honors in their field. Roster Chair Farouk El-Baz, Boston University Center for Remote Sensing Lunar science planning in NASA’s Apollo Program; Earth observations; arid landscapes; and remote sensing. Vice Chair Susan W. Kieffer, Department of Geology, University of Illinois, Urbana-Champaign Planetary sciences; solid-state geophysics; mineral thermodynamics; shock wave physics, geological fluid dynamics, including geothermal, epithermal, and volcanic environments; river hydraulics; and theoretical modeling with supercomputers. Members Thomas J. Casadevall, U.S. Geological Survey Jonathan Fink, Arizona State University Vulcanology, structural geology, igneous petrology, and fluid mechanics. Susan M. Landon, Thomasson Partner Associates Petroleum geology and oil and natural gas exploration and development. Jill McCarthy, U.S. Geological Survey William Shilts, Illinois State Geological Survey Deposits of continental glaciers, physical and chemical characteristics of glacial sediments, environmental geochemistry, and the relationship of disrupted sediments to the recurrence rate and strength of prehistoric earthquakes. M. Nafi Toksoz, Earth Resources Laboratory, Massachusetts Institute of Technology Advanced geophysical parallel computing. Past Chair Grant Heiken, retired, Los Alamos National Laboratory Ex-Officio Member Eldridge Moores, Department of Geology, University of California, Davis Vice-President, IUGS Executive Committee Liaison Richard Calnan, U.S. Geological Survey Chief of International Programs