Hence, foliation of phyllites is different from the foliation in slates that stems from clay mineral alignment, and various from foliation in schists due to the fact schists usually incorporate visible mica grains. Like slates, phyllites show fissility. (Determine eight.74) are less typical and type solely at small pressures or https://www.generationgenius.com/videolessons/rocks-and-minerals-video-for-kids/