Geology Metamorphic Rocks Wordfind CLUES Metamorphic rocks are said to be: deep inside the Earth's crust. Metamorphic rocks don't usually change with exposure to this: . Metamorphic rocks can be found on: plate boundaries. Name given to increase in depth with temperature: . Very hard and course-grained rock: . Physical feature used to classify metamorphic rocks: . Metamorphic rocks change when they are in the: state. Process by which minerals change under heat and pressure: . Name of rocks formed by heat and pressure: . This must be high for metamorphic rocks to form: . Pressures involved when metamorphic rocks are changed: . Type of metamorphic rock: . Metamorphic rocks can be classified according to their: . For metamorphic rocks to form the pressure was in the: . Pressures involved when metamorphic rocks are changed: Metamorphic rocks with thin layers: . This increases as depth increases: . This is required to ensure rocks can melt then change: . Name given to original rock before heat and pressure: . This must happen for metamorphic rocks to be on the Earth's surface: . Name given to sediments hardening into rock: . Mineral found in metamorphic rock: .