Chapter 7 Review Metamorphism & Metamorphic Rocks

Chapter 7 Review Metamorphism & Metamorphic Rocks

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

  1. hornfel
  2. schist
  3. foliation
  4. reorganization of solid mater
  5. facies
  6. metamorphism
  7. contact
  8. depth of burial
  9. marble
  10. 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 Descriptions
a. 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

Top View