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Chapter 2, Section 4:
Metamorphic Rock
Pages 44 to 49
1. What is the Greek meaning of “metamorphism”? Meta=change morphos=shape
2. What characterizes a metamorphic rock? Meaning what is true of all metamorphic
rocks?
_the structure, texture or composition has changed
3. What forces are involved in creating metamorphic rocks?
Heat and pressure
ORGINS OF METAMORPHIC ROCK
4. The heat and pressure at which some metamorphic rocks originally form allow them
to sometimes remain solid at pressures and temperatures that would melt other
rock.
5. Pressure caused by large movements within the crust sometimes cause the mineral
grains in metamorphic rocks to align themselves in parallel bands.
6. During contact metamorphism rock is heated by nearby magma.
7. The effect of heat on rock decreases as the rock’s distance from the magma
increases and its temperature decrease.
8. When pressure builds up in rock which is located under the rock formations,
regional metamorphism occurs.
9. Regional metamorphism occurs deep in the Earth’s crust.
COMPOSITION OF METAMORPHIC ROCK
10. What happens to unstable minerals when exposed to new temperatures
and pressure? They change into more stable minerals
11. What are index minerals and what can they be used for? These are
minerals that form only at certain temperatures and pressures. Garnet
is an example at the Grand Canyon!
12. Give an example of three index minerals. Garnet, Muscovite Mica and
Chlorite
TEXTURES OF METAMORPHIC ROCK
13. What are the names of the two different types of textures for
metamorphic rocks?
Foliated and non-foliated
13. What is the process called, in which a mineral changes composition
during metamorphism? Recrystallization
14. After quartz limestone has recrystallized, what new rock is formed?
Quartzite
Match the correct definition with the correct term. Write the letter in
the space provided
16.A rock in which coarse-grained minerals separate into distinct bands
F
17.A foliated metamorphic rock made from shale
C
18.A metamorphic rock with minerals grains in planes or bands A
19. A metamorphic rock made from phylite that has been exposed to
heat, pressure E
20.A sedimentary rock made of layers of clay B
21.A metamorphic rock made from slate that has been subjected to heat,
pressure D
METAMORPHIC ROCK STRCTURES
22. What is a change in the shape of a rock caused by a force placed on
it called? Deformation
A.foliated
B.shale
C.slate
D.phyllite
E.schist
F. gneiss