University of California, Department of Earth & Planetary Sci. MC 4767, Berkeley, CA 94720 United States ; Lawrence Livermore Natl. Lab., Earth Sciences Division PO Box 808, L--206, Livermore, CA 94551 United States
Lawrence Livermore Natl. Lab., Earth Sciences Division PO Box 808, L--206, Livermore, CA 94551 United States
University of California, Department of Earth & Planetary Sci. MC 4767, Berkeley, CA 94720 United States ; Lawrence Berkeley Natl. Lab., Earth Sciences Division MS 90R-1116, Berkeley, CA 94720 United States