état (1) oxydation (1) lithosphère (1) verre (1) différenciation (1) pièce d'exposition (1) Differentiation (1) Oxidation (1) Observations (1) Observations (1) Magmas (1) Mid-ocean ridges (1) Sulfur (1) Spinel (1) Rocks (1) Percolation (1) Oxidation (1) Manufactures (1) Glass (1) Evidence (1) Anhydrite (1) Agent (Philosophy) (1) Lithosphere (1) Sources (1) Sources (1) Inclusions (1)