They are two types of metamorphic rocks which differ on the basis of formation and appearance.
Explanation:
- Foliated metamorphic rocks are a type of metamorphic rocks which appear like layers which is caused due to heat exposure and pressure.
- They are formed due to high pressures.
- Examples are phyllite, slate, schist
- Non-foliated metamorphic rocks do not have such a layered appearance.
- They are formed due to low pressures and also because of contact metamorphism. This is why they are mostly called as hornfels.
- Examples are hornfels, marble
