Thus, foliation of phyllites differs from the foliation in slates that stems from clay mineral alignment, and diverse from foliation in schists because schists normally include visible mica grains. Like slates, phyllites exhibit fissility. If a rock consists of a specific mineral assemblage at equilibrium, we will use an suitable https://www.generationgenius.com/videolessons/rocks-and-minerals-video-for-kids/