1. Metamorphic Rocks

2. Word Connections Metamorphic Meta - change Morph-change form
Morphic- form

3. How are Metamorphic rocks formed?
The deeper into Earth’s layers the greater the pressure and heat.
Occurs deep beneath Earth’s surface
Changed by extreme heat and pressure
Don’t confuse with igneous
Metamorphic rocks from much deeper inside the earth

6. Connection to Plate Tectonics
Earth’s plates collide and push rock down toward the heat of the mantle.
(subduction of two oceanic plates)

7. (extreme) High temperatures change the size and shape of the rock grains.

8. Pressure!!!!
Before metamorphism
After metamorphism
Pressure causes grains to line up in flat/ parallel layers

9. Rock grains changing due to pressure

10. Different types of grains under fluorescence

11. Rock grains changed after metamorphism

12. Folliated=parallel
folliated- grains arranged in parallel layers

13. All three types of rock can become a metamorphic rock
Igneous-metamorphic
Sedimentary-metamorphic
Metamorphic-metamorphic

14. How are they classified
By the way the grains are arranged

15. What happens ? Total change Appearance Texture Crystal structure
Mineral content

16. Types of Metamorphic Rock
Shale turns into slate.
Sandstone turns into quartzite
Granite turns into gneiss

17. Metamorphic Banding Caused by extreme pressure!!!

19. Uses/Real world Connections
marble
buildings
statues
slate
flooring
roofing walkways
chalkboards