1. GeoZentrum Nordbayern, Department of Geography and Geosciences, Friedrich-Alexander-University Erlangen-Nuremberg, Erlangen, Germany
2. Department of Geosciences, University of Tübingen, Tübingen, Germany
3. Eidgenössisches Nuklearsicherheitsinspektorat ENSI, Brugg, Switzerland
4. Laboratoire des Bio-Indicateurs Actuels et Fossiles, LUNAM Université, Université d'Angers, Angers, France