About the Authors

Valentin Fischer

v.fischer@ulg.ac.be

Affiliations Department of Geology, University of Liège, Liège, Belgium, Operational Directory ‘Earth and History of Life’, Royal Belgian Institute of Natural Sciences, Brussels, Belgium

Nathalie Bardet

Affiliation CNRS UMR 7207, Département Histoire de la Terre, Muséum National d'Histoire Naturelle, Paris, France

Myette Guiomar

Affiliation Réserve naturelle géologique de Haute Provence, Digne-les-bains, France

Pascal Godefroit

Affiliation Operational Directory ‘Earth and History of Life’, Royal Belgian Institute of Natural Sciences, Brussels, Belgium

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: VF NB. Performed the experiments: VF. Analyzed the data: VF NB PG. Contributed reagents/materials/analysis tools: VF MG. Wrote the paper: VF.