Metamorphic rock formation from sedimentary rocks is caused by heat and pressure. after millions of years in transformation, the heat and pressure of the earth's crust changes the physical and chemical properties of rock creating new textures to the rock. the new texture that develops is through the process of recrystallization. as the minerals such as chlorite and mica recrystallize into a) temperature decreases, smaller crystals b) temperature decreases, fine layers c) temperature increases, smaller crystals d) temperature increases, larger crystals