sous-marin (1) environnement (1) Composition (1) Parts (1) Area (1) Parts (1) Area (1) Zeolites (1) Volcanic ash, tuff, etc (1) Veins (1) Smectite (1) Salt (1) Rutile (1) Nature and nurture (1) Magnetite (1) Grain (1) Feldspar (1) Evidence (1) Euthenics (1) Ecology (1) Crystals (1) Barite (1) Adaptation (Biology) (1)