Question 1

Dynamothermal (regional) metamorphism produces ____________.

Accepted Answer

A)  foliated rocks only
B)  nonfoliated rocks only
C)  both foliated and nonfoliated rocksD) A) and B)
E) A) and C)

Question 2

Rapid,deep burial of sediments in an accretionary prism leads to the formation of a metamorphic rock termed ____________.

Accepted Answer

A)  blueschist
B)  greenschist
C)  migmatite
D)  gneissE) A) and B)
F) B) and C)

Question 3

All metamorphic rocks are formed within a fairly narrow range of temperature,approximately 400 to 600°C.

Accepted Answer

A) True 
 B)False

Question 4

A buried body of aragonitic limestone is recrystallized at low temperatures and pressures,producing calcite;this is an example of ____________.

Accepted Answer

A)  diagenesis
B)  erosion
C)  metamorphism
D)  weatheringE) A) and B)
F) A) and C)

Question 5

Squashing a fly with a flyswatter is an application of ____________.

Accepted Answer

A)  normal stress
B)  shear stressC) A) and B)
D) undefined

Question 6

A primary difference between phyllite and schist is ____________.

Accepted Answer

A)  schist contains mica,whereas phyllite contains only clay
B)  phyllite contains mica,whereas schist contains only clay
C)  mica crystals within schist are larger than those within phyllite
D)  mica crystals within phyllite are larger than those within schistE) A) and D)
F) A) and B)

Question 7

At the surface,potassium feldspar reacts with water to form clay;this is an example of ____________.

Accepted Answer

A)  diagenesis
B)  erosion
C)  metamorphism
D)  weatheringE) None of the above
F) B) and D)

Question 8

Consult the figure below.Compared to low-grade metamorphic rocks,high-grade rocks ____________.

Accepted Answer

A)  always contain more quartz and feldspar
B)  are produced closer to the surface,high in the stratigraphic column
C)  are produced at greater temperatures and pressures
D)  are produced at cooler temperatures,but greater pressuresE) A) and B)
F) None of the above

Question 9

Mylonites,formed from dynamic metamorphism,typically display ___________.

Accepted Answer

A)  foliation roughly parallel to a fault
B)  very fine grains
C)  shear zones
D)  All of the above are correct.E) A) and C)
F) All of the above

Question 10

The development of a preferred orientation of large,flaky mica crystals within metamorphic rock is termed ____________.

Accepted Answer

A)  slaty cleavage
B)  phyllitic luster
C)  schistosity
D)  compositional bandingE) A) and D)
F) B) and D)

Question 11

Thermal (contact) metamorphism produces ____________.

Accepted Answer

A)  foliated rocks only
B)  nonfoliated rocks only
C)  both foliated and nonfoliated rocksD) All of the above
E) A) and C)

Question 12

Consult the figure below.Hot water reacting with crust is the basis for what type of metamorphism?

Accepted Answer

A)  contact
B)  hydrothermal
C)  regional
D)  shockE) C) and D)
F) None of the above

Question 13

Differential stress will cause crystals to align in a preferred orientation unless the crystals are ____________.

Accepted Answer

A)  primarily mica
B)  platy
C)  equant
D)  elongateE) A) and B)
F) A) and D)

Question 14

Which type of metamorphism affects the greatest volumes of rock?

Accepted Answer

A)  thermal metamorphism
B)  dynamothermal metamorphism
C)  dynamic metamorphismD) A) and B)
E) A) and C)

Question 15

____________ commonly serves as a protolith in the formation of phyllite.

Accepted Answer

A)  Limestone
B)  Sandstone
C)  Shale
D)  SlateE) C) and D)
F) None of the above

Question 16

The preexisting rock that is subsequently altered to form a metamorphic rock is termed a ____________.

Accepted Answer

A)  parent rock
B)  source rock
C)  protolith
D)  premetarockE) None of the above
F) A) and B)

Question 17

Dynamothermal (regional) metamorphism occurs when ____________.

Accepted Answer

A)  rock becomes buried deeply during continental collision and mountain building
B)  regression of the sea leads to erosion of sedimentary cover atop a body of rock
C)  the upper surface of a body of rock develops a thick soil profile
D)  a pluton causes metamorphism in a small surrounding regionE) None of the above
F) B) and C)

Question 18

Foliated metamorphic rocks possess ____________.

Accepted Answer

A)  leafy plant fossils (ancient foliage) 
B)  a homogenous texture resulting from randomly oriented grains
C)  a planar fabric consisting of mineral grains in preferred orientations or preferred patterns of association (banding) 
D)  minerals precipitated directly from sea waterE) A) and B)
F) None of the above

Question 19

Rocks resulting from thermal (contact) metamorphism will not possess ____________.

Accepted Answer

A)  a new mineral assemblage distinct from that found prior to intrusion
B)  larger crystals than those characterizing the country rock prior to intrusion
C)  foliation
D)  silicate mineralsE) B) and C)
F) None of the above

Question 20

Precambrian metamorphic rocks are exposed at the surface ____________.

Accepted Answer

A)  on Mars and Venus,but nowhere on Earth
B)  at places in continental interiors termed platforms
C)  at places in continental interiors termed shields
D)  at the bottom of the deep seaE) None of the above
F) A) and B)

Exam 8: Metamorphism: A Process of Change

Dynamothermal (regional) metamorphism produces ____________.

Correct AnswerverifiedShow Answer

Squashing a fly with a flyswatter is an application of ____________.

Correct AnswerverifiedShow Answer

Rocks resulting from thermal (contact) metamorphism will not possess ____________.

Correct AnswerverifiedShow Answer

The preexisting rock that is subsequently altered to form a metamorphic rock is termed a ____________.

Correct AnswerverifiedShow Answer

A buried body of aragonitic limestone is recrystallized at low temperatures and pressures,producing calcite;this is an example of ____________.

Correct AnswerverifiedShow Answer

Consult the figure below.Compared to low-grade metamorphic rocks,high-grade rocks ____________.

Correct AnswerverifiedShow Answer

All metamorphic rocks are formed within a fairly narrow range of temperature,approximately 400 to 600°C.

Correct AnswerverifiedShow Answer

The development of a preferred orientation of large,flaky mica crystals within metamorphic rock is termed ____________.

Correct AnswerverifiedShow Answer

Foliated metamorphic rocks possess ____________.

Correct AnswerverifiedShow Answer

Rapid,deep burial of sediments in an accretionary prism leads to the formation of a metamorphic rock termed ____________.

Correct AnswerverifiedShow Answer

Differential stress will cause crystals to align in a preferred orientation unless the crystals are ____________.

Correct AnswerverifiedShow Answer

Which type of metamorphism affects the greatest volumes of rock?

Correct AnswerverifiedShow Answer

____________ commonly serves as a protolith in the formation of phyllite.

Correct AnswerverifiedShow Answer

At the surface,potassium feldspar reacts with water to form clay;this is an example of ____________.

Correct AnswerverifiedShow Answer

Mylonites,formed from dynamic metamorphism,typically display ___________.

Correct AnswerverifiedShow Answer

Dynamothermal (regional) metamorphism occurs when ____________.

Correct AnswerverifiedShow Answer

Precambrian metamorphic rocks are exposed at the surface ____________.

Correct AnswerverifiedShow Answer

A primary difference between phyllite and schist is ____________.

Correct AnswerverifiedShow Answer

Consult the figure below.Hot water reacting with crust is the basis for what type of metamorphism?

Correct AnswerverifiedShow Answer

Thermal (contact) metamorphism produces ____________.

Correct AnswerverifiedShow Answer

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