University of Washington, Earth and Space Sciences Box 351310, Seattle, WA 98195
Lawrence Livermore Laboratory, L-350 P.O. Box 808, Livermore, CA 94551
Geophysical Laboratory, Carnegie Institution of Washington 5251 Broad Branch Road NW, Washington DC, 20015
Lawrence Livermore Laboratory, L-350 P.O. Box 808, Livermore, CA 94551
Geophysical Laboratory, Carnegie Institution of Washington 5251 Broad Branch Road NW, Washington DC, 20015 ; Northwestern University, Department of Geological Sciences, Evanston, IL 60208