Which type of rock forms when an existing rock changes under extreme pressure and intense

Hornfels is a metamorphic rock that can form when a rock is subjected to high temperatures (extreme pressure ). Hornfels, which often forms when magma or lava touches other rock, is non foliated. Heat and pressure changes both igneous rocks sedimentary rocks into metamorphic rocks. hope this helps! :)

Fine out your self ponk

Answer trigonal pyramidal;