1. Metamorphic Rocks

2. Metamorphic rocks are formed by heat and pressure.

4. As the metamorphic rock is buried more deeply, temperatures and pressures continue to rise.

5. If the temperature becomes hot enough, a metamorphic rock will melt
If the temperature becomes hot enough, a metamorphic rock will melt. The molten rock is called magma.

6. Large amounts of metamorphic rocks are usually found underneath large mountain chains.

7. A magma intrusion will heat up the surrounding rocks and form new metamorphic rocks.

8. Small amounts of metamorphic rocks are usually found near magma intrusions.

9. If the sedimentary rock is buried deep in the crust under more and more sediment, often due to plate tectonic movements, the heat and pressure causes metamorphism to occur. This transforms the sedimentary rock into a metamorphic rock

10. Igneous rocks can undergo metamorphism (as a result of heat and pressure) to form metamorphic rocks.
Sedimentary rocks can do the same.

11. Metamorphic Rocks

12. Heat and Pressure Original rock is called the parent rock
New rock is resulting rock (metamorphic rock)
Parent
Rock
New
Uses in real life
Limestone
Marble
Kitchen counters
Shale
Schist
pencils

13. Changes that can occur during metamorphism
Pressure causes a rock’s minerals to flatten out in one direction
Rock always remains solid; doesn’t melt
If the temp gets high enough to melt the rock, it changes to an igneous rock

14. Changes over large areas
Most metamorphic changes occur over large areas (deep and wide) where the temperature and pressure are high
The deeper below the surface, the greater the metamorphic changes occur
Example: Large blocks of rock press together and push up mountain ranges