1. Geological Survey of Norway, Trondheim Norway
2. Nordic Volcanological Center, Institute of Earth Sciences, University of Iceland, Reykjavik Iceland
3. NTNU University Museum, Norwegian University of Science and Technology, Trondheim Norway
4. The National Laboratory for Age Determination, Norwegian University of Science and Technology, Trondheim Norway
5. Department of Biology University of Waterloo Waterloo ON Canada
6. Stockholm University, Department of Physical Geography Stockholm Sweden