1. Department of Geology and Paleontology, Faculty of Natural Sciences Comenius University in Bratislava Ilkovičova 6 842 15 Bratislava Slovakia
2. CNRS‐IRD‐Collège de France‐INRA, CEREGE Aix‐Marseille Univ. 13545 Aix‐en‐Provence France
3. Institute of Chemistry Slovak Academy of Sciences Dúbravská cesta 9, 845 38 Bratislava Slovakia
4. State Geological Institute of Dionýz Štúr Mlynská dolina 1, 817 04, Bratislava 11 Slovakia