mélanger (2) Volcanic ash, tuff, etc (2) Mixing (2) Mineralogical chemistry (2) Manufactures (2) Volcanology (2) Mixing (2) volcanisme (1) région (1) minéral (1) minéralogie (1) île (1) différenciation (1) âge (1) classification (1) index (1) Differentiation (1) Composition (1) Area (1) Charts, diagrams, etc (1) Cases (1) Rich people (1) Magmas (1) Minerals (1) Area (1) Andesite (1) Water (1) Volcanism (1) Trachyandesite (1) Trace elements (1)