1. Baltic Sea Research Institute; Warnemuende Germany
2. Institute of Paleontology and Historical Geology; University of Munich; Munich Germany
3. Laboratoire de Paléobiologie et Palynologie; Université Pierre et Marie Curie; Paris France
4. Leibniz-Laboratory for Radiometric Dating and Stable Isotope Research; Kiel University; Kiel Germany
5. Department of Geological Sciences; University of South Carolina; Columbia South Carolina USA
6. Faculty of Earth Sciences; Vrije Universiteit Amsterdam; Amsterdam Netherlands
7. Alfred-Wegener-Institut für Polar- und Meeresforschung; Bremerhaven Germany
8. The Education Bureau of Aomori Prefecture; Seihoku Educational Office; Goshogawara Japan
9. Graduate School of Environmental Earth Science; Hokkaido University; Sapporo Japan
10. Department of Earth and Planetary Sciences, Graduate School of Science; Hokkaido University; Sapporo Japan