1. Department of Geology Ghent University Krijgslaan 281‐S8 B‐9000 Ghent Belgium
2. Department of Archaeology Ghent University Sint‐Pietersnieuwstraat 35 B‐9000 Ghent Belgium
3. Geological Survey of Belgium Royal Belgium Institute of Natural Sciences Jennerstreet 131000 Brussels Belgium
4. Research Department Meise Botanic Garden Nieuwelaan 38 1860 Meise Belgium
5. Department of Biology University of Antwerp, ECOSPHERE Universiteitsplein 1 2610 Wilrijk Belgium
6. Ruben Willaert nv Ten Briele 14.15 8200 Sint‐Michiels Belgium