Question 1

A mineral is said to be ____,if after a long time it does not convert to a new mineral.

Accepted Answer

A)  fixed
B)  stable
C)  invariable
D)  crystalline
E)  constantF) D) and E)
G) A) and D) B

Question 2

Metamorphism may involve all of the following except __.

Accepted Answer

A)  formation of new minerals
B)  changes in rock texture: grain size,grain shape,foliation,et cetera
C)  metasomatism
D)  complete melting of the rock
E)  recrystallizationF) C) and D)
G) A) and E)

Question 3

_____ are important economic resources for lead,zinc,gold,silver,tungsten,tin,and mercury.

Accepted Answer

A)  Meteor impact sites
B)  Hydrothermal veins
C)  Marble
D)  Schists
E)  QuartzitesF) C) and E)
G) B) and E)

Question 4

In some instances a single mineral,a ____,suffices for determination of the pressure and temperature under which a metamorphic rock formed.

Accepted Answer

A)  metamorphic index mineral
B)  metamorphic key mineral
C)  metamorphic trace mineral
D)  metamorphic mica mineral
E)  metamorphic pressure-temperature mineralF) All of the above
G) A) and E)

Question 5

___ tends to deform objects into oblong or flattened forms.

Accepted Answer

A)  Differential stress
B)  Strain
C)  Temperature
D)  Pressure
E)  MagnetismF) A) and E)
G) D) and E)

Question 6

Gneissic texture has the minerals separated into distinct (light and dark)layers,or lenses.

Accepted Answer

A) True 
 B)False

Question 7

The most important factor in controlling the final metamorphic product is __.

Accepted Answer

A)  temperature
B)  pressure/stress
C)  the composition of the pre-existing rock
D)  the effect of fluids such as water
E)  shockF) A) and E)
G) A) and D)

Question 8

A metamorphic rock is similar both in mineralogy and texture to its parent rock.

Accepted Answer

A) True 
 B)False

Question 9

Differential stress forces constituents of the rock to become parallel to one another.

Accepted Answer

A) True 
 B)False

Question 10

Metamorphism includes melting.

Accepted Answer

A) True 
 B)False

Question 11

The differential stress responsible for foliation can take place at _____.

Accepted Answer

A)  the Gutenberg discontinuity
B)  hydrothermal locations
C)  static plate boundaries
D)  ocean-ocean convergent boundaries
E)  the continental crust-ocean crust transition zoneF) A) and D)
G) B) and E)

Question 12

____ is the lowest-grade rock in progressive metamorphism.

Accepted Answer

A)  Schist
B)  Gneiss
C)  Marble
D)  Slate
E)  PhylliteF) A) and D)
G) All of the above

Question 13

_______ forms when a limestone recrystallizes during metamorphism.

Accepted Answer

A)  Marble
B)  Gneiss
C)  Phyllite
D)  Quartzite
E)  CoalF) A) and D)
G) A) and E)

Question 14

The zone of contact metamorphism (the aureole) ,____.

Accepted Answer

A)  extends throughout the surrounding region because rock is such a good conductor of heat
B)  is commonly broad,as much as several kilometers wide
C)  is commonly rather narrow,from 1 to 100 meters wide
D)  is a thin zone,less than 1 meter wide
E)  is a very thin zone,no more than a few centimeters in widthF) A) and B)
G) A) and D) C

Question 15

The light-color layers within a typical gneiss are formed by __.

Accepted Answer

A)  amphiboles
B)  feldspars
C)  pyroxenes
D)  olivine
E)  calciteF) D) and E)
G) All of the above

Question 16

Shock metamorphism can occur as a result of ______.

Accepted Answer

A)  volcanic eruptions
B)  meteor impacts
C)  tsunami
D)  earthquakes
E)  tornadoesF) D) and E)
G) A) and C)

Question 17

Andalusite,kyanite,and sillimanite are among the best known index minerals that provide information about the temperature and pressure of metamorphism.

Accepted Answer

A) True 
 B)False

Question 18

_______ is a very fine-grained metamorphic rock that splits easily along parallel planes.

Accepted Answer

A)  Slate
B)  Sandstone
C)  Marble
D)  Arkose
E)  GneissF) None of the above
G) A) and E)

Question 19

__________ forces the constituents of a rock to become parallel to one another.

Accepted Answer

A)  Pressure
B)  Differential stress
C)  Strain
D)  Heat from a nearby pluton
E)  StarchF) B) and C)
G) A) and E)

Question 20

___ is a fine-grained metamorphic rock whose parent rock was basalt.

Accepted Answer

A)  Mica schist
B)  Phyllite
C)  Hornfels
D)  Garnet schist
E)  GneissF) A) and B)
G) B) and C) C

Exam 15: Metamorphism, Metamorphic Rocks, and Hydrothermal Rocks

A mineral is said to be ____,if after a long time it does not convert to a new mineral.

Correct AnswerverifiedB

Metamorphism may involve all of the following except __.

Correct AnswerverifiedShow Answer

_____ are important economic resources for lead,zinc,gold,silver,tungsten,tin,and mercury.

Correct AnswerverifiedShow Answer

In some instances a single mineral,a ____,suffices for determination of the pressure and temperature under which a metamorphic rock formed.

Correct AnswerverifiedShow Answer

___ tends to deform objects into oblong or flattened forms.

Correct AnswerverifiedShow Answer

Gneissic texture has the minerals separated into distinct (light and dark)layers,or lenses.

Correct AnswerverifiedShow Answer

The most important factor in controlling the final metamorphic product is __.

Correct AnswerverifiedShow Answer

A metamorphic rock is similar both in mineralogy and texture to its parent rock.

Correct AnswerverifiedShow Answer

Differential stress forces constituents of the rock to become parallel to one another.

Correct AnswerverifiedShow Answer

Metamorphism includes melting.

Correct AnswerverifiedShow Answer

The differential stress responsible for foliation can take place at _____.

Correct AnswerverifiedShow Answer

____ is the lowest-grade rock in progressive metamorphism.

Correct AnswerverifiedShow Answer

_______ forms when a limestone recrystallizes during metamorphism.

Correct AnswerverifiedShow Answer

The zone of contact metamorphism (the aureole) ,____.

Correct AnswerverifiedC

The light-color layers within a typical gneiss are formed by __.

Correct AnswerverifiedShow Answer

Shock metamorphism can occur as a result of ______.

Correct AnswerverifiedShow Answer

Andalusite,kyanite,and sillimanite are among the best known index minerals that provide information about the temperature and pressure of metamorphism.

Correct AnswerverifiedShow Answer

_______ is a very fine-grained metamorphic rock that splits easily along parallel planes.

Correct AnswerverifiedShow Answer

__________ forces the constituents of a rock to become parallel to one another.

Correct AnswerverifiedShow Answer

___ is a fine-grained metamorphic rock whose parent rock was basalt.

Correct AnswerverifiedC

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B

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C

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C