| A | B |
|---|
| metamorphic rocks | formed when existing rocks are changed by heat and pressure |
| foliated metamorphic rocks | have obvious layers that are formed by heat and/or pressure |
| non-foliated metamorphic rocks | have obvious layers or bands |
| slate | a type of foliated metamorphic rock |
| marble | a well-known type of non-foliated rock, which is made out of limestone |
| regional metamorphism | a large area changed by heat or pressure, usually caused when a large body of magma rises upwards |
| contact metamorphism | occurs over a smaller area where rock is changed by direct contact with magma |
| rock cycle | a continuous process of the change of one rock type to another |
