| A | B |
|---|
| regional | Metamorphism over a wide area |
| contact | Metamorphism caused by igneous intrusion |
| hydrothermal | Metamorphism caused by hot water |
| folaited | Rock in which the crystals have been elongated at right angles to pressure force |
| nonfoliated | Rock in which the crystals have not been elongated |
| porphyroblast | Large crystal in a metamorphic rock |
| metamorphic rock | Rock that has been changed by heat, pressure, or both |
| sedimentary rock | Becomes metamorphic rock under heat, pressure, or both |
| igneous intrusion | Magma that pushes or leaks into a sedimentary rock and changes it into metamorphic rock. |
| metamorphism | Changing shape or nature |
