2. Made of small grains of sand
Sandstone

3. As the rock is exposed to () and/or () the individual mineral grains recrystallize.
Grains are much larger
Quartzite

4. There are 2 types of metamorphism that occur.

6. () metamorphism
Lava
Contact Metamorphism
Magma
Contact Metamorphism

7. Contact metamorphism Intrusive Igneous Rock Metamorphic Rock
Extrusive Igneous Rock
Metamorphic Rock
Intrusive Igneous Rock
Metamorphic Rock

8. Contact Metamorphism – () the () rocks

10. What is parent rock you ask…

11. Lets take a look. Side Note
All metamorphic rocks come from () in a () rock.
The parent rock is the original rock the metamorphic rock came from.
Lets take a look.

12. Parent Rock

13. Contact metamorphism
Parent rock
Metamorphic rock

14. Parent Rock

15. Contact metamorphism
Parent rock
Metamorphic rock

16. Parent Rock
It doesn’t say, but what sedimentary rock do you think is the parent rock?

17. conglomerate
Metaconglomerate
Parent rock
Metamorphic rock

18. The 2nd type of metamorphism that occurs.
2. () metamorphism – heat and pressure combine to alter () over a large area.
These rocks get changed when () plates collide. The () the rock is to the plate boundaries the more the rock gets changed.

19. Differential stress
Regional metamorphism can create mountains!!!

20. Folded rock caused by plate tectonics
Regional Metamorphism (large area)

21. Folded rock caused by plate tectonics
Regional Metamorphism (large area)

22. What is the parent rock???

23. Foliation

24. Rock type and depth of burial

25. () regional metamorphism (high heat and pressure) () the minerals in a rock. This flattens and () the minerals.
Foliated – flattened and aligned minerals. () rocks split easily along the flattened, aligned mineral layers.
Lets see what foliation looks like…

26. The minerals normally line up perpendicular to the direction of the pressure.

27. When the minerals are () into light and dark mineral layers it is called ()
Nice!!!
oops…
Gneiss!!!

29. One more thing… Since metamorphic rocks are formed under such () what do think happens to their ()?

30. () metamorphism – just () that changes rock
Summing it all up
() metamorphism – just () that changes rock
Regional ()– heat and () change rock

31. Metamorphic Rock Identification
Reference tables page 7
Metamorphic Rock Identification
Lets check out the properties of metamorphic rocks.

32. What it looks like

33. How big the mineral grains are

34. What minerals are in the rock

35. Is it formed by regional or contact metamorphism

36. Important information

37. Umm, rock names

38. How the rock may be shown on a map

39. Lets try to figure out a mystery metamorphic rock.
Observed properties:
1. The texture is foliated, minerals are aligned but not banded.
2. The grains are fine to medium sized.
3. Contains, mica, quartz, feldspar, amphibole, garnet and pyroxene.

40. 1. The minerals are aligned but not banded.

41. 2. The grains are fine to medium sized.

42. 3. Contains, mica, quartz, feldspar, amphibole, garnet and pyroxene.

43. Through which rock do all the properties match?

44. Our mystery rock is… Yup, it is Schist.
We can figure out information about any metamorphic rock with the E.S.R.T.