1. Paleoclimatology Program, National Geophysical Data Center, National Oceanic and Atmospheric Administration, 325 Broadway, Boulder, CO 80303 and Lamont-Doherty Geological Observatory, Palisades, NY 10964
2. Department of Geography, University of Oregon, Eugene, OR 97403
3. Department of Geological Sciences, Brown University, Provsdence, RI 02912