Metamorphic Rock Notes
(p. 106 – 111)
Name: ______________________________________ Date: _______ Period: _____
Introduction
1. Rocks can go through changes where they become a brand new rock. This process is
called ______________________________________.
2. This word is Greek. Meta means ______________________ and morphos means
___________________.
3. Metamorphic rocks occur when the __________________, _________________, or
____________________________ have changed.
4. All of three types of rock (_________________, ___________________, and
_______________________ can be changed by ____________, ______________, or
a combination of both.
Origins of Metamorphic Rock
5. Texture or mineral composition of a rock can change if the ______________________
or ______________________ of the new environment is different from the one that
the rock was originally formed in.
6. The temperature that most metamorphism will occur is between _____ °C to
________°C. However some rocks will go through metamorphosis above 1000°C.
7. The _______________ and ______________ that metamorphic rocks form is what
allows the rock to heat to this temperature and stay solid.
8. The depth that most rocks go through the metamorphic change is at depths greater than
_____________________ (about 1.25 miles).
9. Large movements within the curst of the Earth adds more ____________________ on
a rock during metamorphism. This can cause _____________ ____________ in rock
to align (line up) in certain directions.
Composition of Metamorphic Rock
10. Metamorphism happens when ________________ and __________________ inside
Earth’s crust change.
11. Original __________________________ change into new ________________. For
example: calcite, quartz and hematite will recrystallize to form the metamorphic mineral
________________.
Textures of Metamorphic Rock
12. Scientists classify igneous, sedimentary, and metamorphic rocks by their
____________________.
13. Metamorphic rocks have two textures: _________________________ or
_______________________.
Foliated Metamorphic Rock
14. The texture of a metamorphic rock that has mineral grains arranged in ____________
or _______________ is called ______________________.
15. This metamorphic rock usually contains _______________________ (lined up) grains of
________________ minerals.
16. A metamorphic rock can continue to change into another ____________________ rock
if it is exposed to more ______________ and ______________________. For
example: sedimentary shale becomes _____________________ (metamorphic), which
can become ________________________ with more heat and pressure. Then, with
more heat and pressure it can become _________________, only to have MORE heat
and pressure make it become _____________________________.
Nonfoliated Metamorphic Rock
17. The texture of a metamorphic rock that has mineral grains that ARE NOT arranged in
______________ or ___________________ is called _______________________.
The minerals ARE NOT __________________ (lined up).
18. These rocks are commonly made of _____________ or _____________________
minerals.
19. During metamorphism, the crystals of the minerals may change in ___________ or
_______________________ called __________________________________.
20. Examples of this are: quartz sandstone (sedimentary rock) is exposed to
____________________ and _____________________, and the minerals
recrystallize to form __________________________; also limestone is exposed to
_____________________ and ____________________________, and the minerals
recrystallize and becomes ______________________.
Metamorphic Rock Structures
21. When metamorphic rocks change shape because of force placed on them, they can be
________________________ or _______________________. This is called
______________________________________. Some deformations are called
____________________ or __________________.