1. Earth and Atmospheric Sciences; Purdue University; West Lafayette Indiana USA
2. Laboratory of Palaeobotany and Palynology; Utrecht University; Utrecht Netherlands
3. School of Earth, Ocean and Planetary Sciences; Cardiff University; Cardiff UK
4. Department of Meteorology; Stockholm University; Stockholm Sweden
5. Department of Geological Sciences; San Diego State University; San Diego California USA
6. Geological Survey of Canada (Atlantic); Dartmouth, Nova Scotia Canada