1. Terrestrial Paleoclimatology Research Group Department of Geosciences Baylor University Waco TX USA
2. Department of Earth and Atmospheric Sciences University of Houston Houston TX USA
3. Department of Earth and Environmental Sciences Wesleyan University Middletown CT USA
4. Department of Earth, Environmental and Planetary Sciences Brown University Providence RI USA
5. Department of Paleobiology National Museum of Natural History Smithsonian Institution Washington DC USA