1. Department of Geological SciencesStanford UniversityStanford California USA
2. Department of Earth, Atmospheric, and Planetary SciencesMassachusetts Institute of TechnologyCambridge Massachusetts USA
3. Marine Palynology and Paleoceanography Group, Department of Earth SciencesUtrecht UniversityUtrecht Netherlands
4. Department of Earth SciencesUniversity of California, RiversideRiverside California USA