1. OD Earth and History of Life; Royal Belgian Institute of Natural Sciences; Brussels Belgium
2. Géosciences Environnement Toulouse (OMP); Université de Toulouse (UPS); Toulouse France
3. Institut für Geologie und Mineralogie; Universität zu Köln; Cologne Germany
4. Laboratory of Geosciences; Hassan II University; Casablanca Morocco
5. Department of Geology; University of Liège; Liège Belgium