1. Institute for Earth and Environmental Science Albert‐Ludwigs‐University Freiburg Germany
2. Geological Survey of Saxony Saxon State Agency for Environment, Agriculture and Geology Freiberg Germany
3. Steinmann Institut University of Bonn Bonn Germany
4. Max‐Planck‐Research Group Paleobiogeochemistry University of Bremen Bremen Germany
5. Dezernat Rohstoffgeologie (Mineralogie, Petrologie, Geochemie) Hessisches Landesamt für Naturschutz, Umwelt und Geologie Wiesbaden Germany
6. Institute of Geology and Mineralogy University of Cologne Cologne Germany