1. Institute of Geology and Mineralogy, University of Cologne, Zuelpicher Strasse 49a, D-50674 Cologne, Germany.
2. Department of Geosciences, University of Massachusetts, 611 North Pleasant Street, Amherst, MA 01003, USA.
3. Far East Branch Russian Academy of Sciences, North-East Interdisciplinary Scientific Research Institute, 16 Portovaya Street, 685000 Magadan, Russia.
4. Helmholtz Centre Potsdam, GFZ German Research Centre for Geosciences, Telegrafenberg C321, D-14473 Potsdam, Germany.
5. Department of Earth and Space Sciences, University of Washington, Box 351310, Seattle, WA 98195–1310, USA.
6. Climate Impacts Research Centre, Umeå University, SE-981 07 Abisko, Sweden.
7. Institute of Geological Sciences, Free University Berlin, Malteserstrasse 74-100, Haus D, D-12249 Berlin, Germany.