1. Metamorphic Rock Cha-cha-changes
Colossal marble statue of a lion which originally crowned a cliff top tomb. The eye sockets may have had insets of glass which reflected the light across the sea. Hellenistic period; late 4th to early 3rd century BC from Knidos, Asia Minor, now Turkey. (The British Museum)

2. How does metamorphic rock form?
An already existing rock can change due to tremendous heat and/or pressure.
This change is called metamorphism.

3. How does metamorphic rock form?
Temperature
Most metamorphism occurs at temperatures between 150 deg C to 1,000 deg C.
Rocks don’t necessarily always melt at high temperatures because they still might be under high pressure.

4. How does metamorphic rock form?
Pressure
Layers of rock can push down and change a rock.
Both pressure and heat can make a rock change its composition.

5. How does metamorphic rock form?
FOLIATION
If under enough pressure, the minerals in a rock can move slowly during metamorphism.
Stripes (foliation) are made by certain minerals lining up.
Examples include gneiss.

6. How does metamorphic rock form?
Contact metamorphism
Regional metamorphism

7. How does metamorphic rock form?
Metamorphic structures include folds like these seen in Labrador, Canada.

9. What are metamorphic rocks made of?
Certain minerals will change within a rock if under enough heat or pressure.
garnet
calcite
quartz
hematite

10. How do geologists classify metamorphic rock?
Metamorphic rocks are rocks that have been changed in form due to heat, pressure, and chemical alteration.
FOLIATED
Slate
Schist
Gneiss
NONFOLIATED
Marble
Quartzite

11. How do geologists classify metamorphic rock?
Foliated
Non foliated

12. Where did I come from??? Schist Gneiss Marble Quartzite
Slate
Comes from shale (sed.)
Schist
Comes from slate, which comes from shale!!!
Gneiss
Comes from Granite (ign.)
Marble
Comes from limestone (sed)
Quartzite
Sandstone changes into quartzite.
and that stuff comes from QUARTZ…
the hardest common mineral yea!!!

13. Discovery Channel Marble Mineral Marvel Stone
How do you get marble???

14. That’s gneiss schist!!!

16. She thinks they are real rocks! Sucker!!!
YES!!!
She thinks they are real rocks! Sucker!!!

17. Name that Rock Type!!! READY??!! Igneous, Sedimentary, or Metamorphic?
READY??!! is a link to Tim and Moby on Rock Types.

18. Intrusive or extrusive
igneous

19. Sandstone or siltstone
sedimentary

20. Deposition in layers
sedimentary

21. Cemented together with mud
sedimentary

22. Made by heat and pressure
metamorphic

23. Obsidian, granite, and basalt
Igneous

24. Foliated like gneiss
Metamorphic

25. Clastic, organic, or chemical
Sedimentary

26. Felsic or mafic magma
Igneous

27. Minerals are chemically changed
metamorphic

28. Marble, schist, or slate
metamorphic

29. Made from lava or magma
Igneous

30. Could have fossils
sedimentary

31. Most common rock of all crust
Igneous