Chapter 7 Review – Metamorphism & Metamorphic Rocks
Top of Form
1. / Metamorphism literally means to "change form."/ True
/ False
2. / Which of the following is an agent of metamorphism?
/ electromagnetism
/ heat
/ chemically active fluids
/ all of the above
/ only heat and chemically active fluids
3. / The agents of metamorphism include heat, pressure, and chemically active fluids.
/ True
/ False
4. / Most metamorphism takes place ______.
/ at Earth's surface
/ only at a significant depth below the surface
/ in young sediments
/ in Earth's core
/ where a rock is subjected to conditions unlike those in which it formed
5. / Contact metamorphism occurs in association with igneous intrusions.
/ True
/ False
6. / The most important agent of metamorphism is heat.
/ True
/ False
7. / During extreme metamorphism, the transformation may be so complete that the parent rock cannot be determined.
/ True
/ False
8. / The parent rock of a marble is ______.
/ shale
/ limestone
/ granite
/ slate
/ sandstone
9. / What is the texture of the following metamorphic rock?
.
/ foliated
/ not foliated
/ no texture exists
10. / The following close-up image is of a metamorphic rock called ______.
/ greenstone
/ slate
/ schist
/ gneiss
/ marble
11. / When rocks exhibit ductile behavior, their mineral grains tend to flatten and elongate when subjected to differential stress.
/ True
/ False
12. / When shale is subjected to low-grade metamorphism, its minerals align themselves and the metamorphic rock is formed.
/ quartzite
/ marble
/ slate
/ gneiss
/ amphibolite
13. / Mineral alignment in a metamorphic rock usually gives the rock a foliated texture.
/ True
/ False
14. / Following high-grade metamorphism, the segregation of minerals into separate bands is referred to as ______.
/ schistocity
/ slaty cleavage
/ rock cleavage
/ preferred orientation
/ gneissic texture
15. / When subjected to pressure, metamorphosed rocks often exhibit a layered or banded texture called ______.
/ foliation
/ slating
/ bedding
16. / Most regional metamorphism occurs ______.
/ in areas of active mountain building
/ in the lower mantle
/ around magmatic intrusions
/ around volcanoes
/ on the seafloor
17. / One type of metamorphic rocks that form in fault zones are termed ______.
/ fault breccias
/ mylonites
/ conglomerates
/ serpentinites
/ none of the above
18. / The various types of foliation depend upon the grade of metamorphism and the mineralogy of the parent rock.
/ True
/ False
19. / Regional metamorphism produces the greatest volume of metamorphic rock.
/ True
/ False
____ 20. Metamorphism can best be defined as
A. compaction and cementation of rock fragments
B. precipitation of minerals dissolved in water
C. solidification of magma by cooling
D. changing of a rock by heat and pressure
____ 21. Where does most metamorphic rock form?
A. deep below the earth's surface
B. on the earth's surface
C. within volcanoes
D. on lake beds
____ 22. Which of the following is classified as a metamorphic rock?
A. basalt
B. diorite
C. limestone
D. schist
____ 23. The type of metamorphism that results from the heat of magma is called
A. foliation
B. the rock cycle
C. contact metamorphism
D. extrusion
____ 24. Slate is formed when great pressure acts on, and causes crystal changes in what sedimentary rock?
A. granite
B. obsidian
C. limestone
D. shale
____ 25. Which of the following describes the processes by which sedimentary rock becomes metamorphic rock?
A. weathering
B. erosion
C. intense heat and pressure
D. cooling and solidifying
____ 26. Metamorphic rocks with mineral crystals arranged in parallel layers, or bands, are
A. clastic
B. porphyritic
C. intrusive
D. foliated
____ 27. An example of a foliated metamorphic rock is
A. granite
B. gneiss
C. marble
D. quartzite
____ 28. Metamorphic rocks are often found in association with what geologic event?
A. volcanic eruptions
B. earthquakes
C. mountain building
D. weathering and erosion
____ 29. The meaning of the word "metamorphic" is
A. fire-formed
B. to change
C. sedimentaion
D. permanent
30. Metamorphism may produce all of the following except
A. schistose texture
B. scoria
C. recrystallization
D. slaty cleavage
E. light and dark layers in rocks
Bottom of Form
Top of Form
31. In the alteration of parent rocks to metamorphic rocks, all the factors below control properties and mineral composition except
A. weathering
B. hot water or steam
C. temperature and pressure
D. composition of the parent rock
32. Which parent rock subjected to intense heat and pressure is likely to produce quartzite?
B. dolomite
C. granite
D. shale
E. sandstone
33. Which of the following is not one of the characteristics of metamorphic rocks?
A. minerals generally having lower specific gravities than those of the parent rock
B. foliated or nonfoliated textures
C. cleavage
D. parallel alignment of minerals
E. minerals nearly always of microscopic size because of intense heat and pressure
34. Parent rocks and their common metamorphic equivalents are paired below. Which pair is not correct?
A. basalt-hornfels
B. dolomite-marble
C. shale-phyllite
D. shale-marble
35. Matching:
____ Metamorphism
____ metamorphism adjacent to a pluton
____ Solid-state recrystallization of a rock
____ rock made next to a pluton
____ Pressure roughly correlates with the
____ planar orientation of minerals in a rock
____ non-foliated metamorphic rock
____ layered and foliated metamorphic rock
____ A rock revealing its metamorphic facies
____ group of rock possessing specific types of minerals reflecting the temperature and pressure of formation
- hornfel
- schist
- foliation
- reorganization of solid mater
- facies
- metamorphism
- contact
- depth of burial
- marble
- gneiss
36. Fill in the blanks. Write in the blanks beside the rock descriptions the rock terms that fit best
gneiss
granite
hornfels
marble
phyllite
quartzite
schist
slate
Rock Descriptionsa. coarse-textured, nonfoliated rock, mostly calcite ______
b. foliated rock showing alternating light and dark layers ______
c. foliated rock with visible grains of platy minerals ______
d. dense, hard rock, mainly recrystallized SiO2 grains ______
e. fine-grained, foliated rock with silky luster, originally shale ______
f. rock resulting from metasomatism of gneiss and schist during regional metamorphism
______
g. very fine-grained, foliated rock that splits easily ______
h. nonfoliated, dark, dense-textured rock containing microscopic mica grains ______
37. Match descriptions to the following metamorphisms:Example Rocks
___ Contacta. large area ______&______
___ Regional b. low temp & pressure due to above weight ______)___
___ Burial c. faulting ______&______
___ Cataclastic d. near magma ______)___
38. Which rocks would you find in each condition above? Write rocks in blanks above.
gneissmarble hornfel serpentinite slate quartzite schist
39. Put the following rocks in order of change due to increasing heat and pressure
___Gneiss ___Phyllite ___Schist ___Shale ___Slate