2. Metamorphic Rocks

3. Ex: Caterpillar to Butterfly Ex: Granite to Gneiss
Metamorphic = to change form
Ex: Caterpillar to Butterfly
Ex: Granite to Gneiss
Granite

4. How are metamorphic
rocks formed?
extreme heat
and/or
pressure

5. The temperature changes in the rock make it more flexible.
The atoms re-arrange

6. MELTING DOES NOT OCCUR!
If melting occurs,
it is classified as an
Igneous Rock

7. Where does the Heat Come from?
Heat comes from magma from the Earth’s interior.

8. Where does the Pressure Come From?
Pressure comes when tectonic plates converge or squeeze together.

9. Regional Metamorphism
Large geographic area
Example:
where mountains form

11. small geographic area Example: Contact Metamorphism when rocks come in
contact with magma

12. Two Classifications for Metamorphic Rock
Metamorphic Rocks
Nonfoliated
&
Foliated

13. Nonfoliated
no layers or banding.
Example Marble

14. usually black and white
Foliated
banding of minerals
usually black and white

15. Distorted Structure
folded layers

18. I hope that after the test we can say this to each other!!Me
You