Question 1

What is the difference between a strike- slip fault and a dip- slip fault?

Accepted Answer

In a strike- slip fault, displacement is mostly horizontal, parallel to the strike of the fault plane. Strike- slip faults are caused by shearing stress. In a dip- slip fault, displacement is mostly vertical, parallel to the dip of the fault plane. Dip- slip faults are caused by compressive or tensional stress.

Question 2

Visible evidence of strain deformation is most readily seen in:

Accepted Answer

A)   sedimentary rocks.
B)   metamorphic rocks.
C)   igneous rocks.
D)   equally in all rock types.E) B) and D)
F) B) and C)

Question 3

What are domes and basins? How do they form?

Accepted Answer

A dome is a subtle, oval- shaped bulge i...

Question 4

The type of fault most commonly found in transform plate boundaries is a:

Accepted Answer

A)   normal fault.
B)   dip- slip fault.
C)   reverse fault.
D)   strike- slip fault.E) All of the above
F) A) and D)

Question 5

All of the following are evidence of brittle failure EXCEPT:

Accepted Answer

A)   joints.
B)   faults.
C)   fractures.
D)   folds.E) B) and D)
F) None of the above

Question 6

Which of the following statements about rock deformation is NOT true?

Accepted Answer

A)   Brittle failure is likely to occur in rocks under low- temperature and low- pressure conditions.
B)   Plastic deformation is likely to occur rocks under low- temperature and low- pressure conditions.
C)   Plastic deformation is likely to occur in rocks under high- temperature and high- pressure conditions.
D)   Elastic deformation is likely to occur if rocks are stressed to only a very minor degree.E) A) and D)
F) None of the above

Question 7

What is the difference between reverse faults and thrust faults?

Accepted Answer

Reverse faults occur where powerful hori...

Question 8

Why are anticlines and synclines not necessarily evident in the topography as hills and valleys?

Accepted Answer

Anticlines and synclines are structures ...

Question 9

A rock that undergoes sufficient stress to change its original shape has exceeded its:

Accepted Answer

A)   elastic limit.
B)   plastic limit.
C)   stress limit.
D)   strain limit.E) A) and C)
F) B) and D)

Question 10

Which of the following statements about folds is NOT true?

Accepted Answer

A)   Broad open synclines and anticlines are far more common than tightly folded ones in regions near convergent plate margins.
B)   Synclines are concave, trough- like folds, and anticlines are convex, arch- like folds.
C)   Folding produces alternating synclines and anticlines with adjacent folds sharing a common limb.
D)   Overturned folds are caused by prolonged directed pressure on asymmetrical folds.E) A) and C)
F) None of the above

Question 11

Which of the following statements concerning horsts and grabens is true?

Accepted Answer

A)   Almost all faults produce either horsts or grabens.
B)   Horsts result from normal faults, while grabens result from reverse faults.
C)   Horsts and grabens are most commonly produced by compressional stress.
D)   Grabens are fault blocks that dropped vertically relative to horsts.E) All of the above
F) B) and C)

Question 12

Which one of the following rocks will most likely exhibit brittle failure upon stress?

Accepted Answer

A)   Wet shale.
B)   Dry sandstone.
C)   Wet schist.
D)   Wet limestone.E) A) and C)
F) None of the above

Question 13

How can geologists determine the type and direction of stress from the orientation of folds and direction of slip in faults?

Accepted Answer

Folds are always caused by compressive stress. The direction of stress is perpendicular to the axial plane. Faults can be caused by any of the three types of stress, but specific types of faults are caused by specific types of stress. Normal faults are caused by tensional stress perpendicular to the fault plane. Reverse and thrust faults are caused by compressive stress perpendicular to the fault plane. Strike- slip faults are caused by shearing stress parallel to the direction of strike.

Question 14

Which of the following statements concerning stress is NOT true?

Accepted Answer

A)   Shearing stress commonly exists at transform plate margins.
B)   Compression, tension, and shearing stress are all capable of causing strain in rock units.
C)   Tensional stress commonly exists at continental collision plate boundaries.
D)   Compressive stress commonly exists at subducting plate boundaries.E) B) and D)
F) C) and D)

Question 15

In geology, the term "stress" refers to:

Accepted Answer

A)   compression of a rock unit.
B)   any deformation of a rock unit.
C)   forces that might cause deformation of a rock unit.
D)   stretching of a rock unit.E) B) and D)
F) B) and C) C

Question 16

A region exhibiting symmetrical or open synclines and anticlines is more likely to be located:

Accepted Answer

A)   at the edges of mountain belts in areas that are relatively inactive tectonically.
B)   near a transform plate boundary.
C)   near a convergent plate boundary.
D)   near a divergent plate boundary.E) All of the above
F) B) and C)

Question 17

Why do geologists consider it important to make strike- and- dip measurements on rocks?

Accepted Answer

By mapping hundreds of strike- and- dip ...

Question 18

Rocks subjected to relatively high temperatures are more likely to:

Accepted Answer

A)   deform elastically rather than undergo brittle failure.
B)   deform plastically rather than elastically.
C)   undergo brittle failure rather than plastic deformation.
D)   deform elastically rather than plastically.E) None of the above
F) A) and B)

Question 19

All of the following statements about the history of folded rock are true EXCEPT:

Accepted Answer

A)   folds form in rocks composed of flexible minerals.
B)   folds are typically associated with tension at divergent boundaries.
C)   folds form in rocks that experienced high pressures and temperatures.
D)   folds form in rocks that deformed very slowly.E) None of the above
F) A) and D)

Question 20

Vertical displacement occurs in all of the following EXCEPT:

Accepted Answer

A)   strike- slip faults.
B)   normal faults.
C)   reverse faults.
D)   thrust faults.E) None of the above
F) B) and D)

Exam 9: Earth Structures - Folds, Faults, and Fabrics

What is the difference between a strike- slip fault and a dip- slip fault?

Visible evidence of strain deformation is most readily seen in:

Correct Answer
verified

What are domes and basins? How do they form?

Correct Answer
verified
A dome is a subtle, oval- shaped bulge i...
View Answer

The type of fault most commonly found in transform plate boundaries is a:

Correct Answer
verified

All of the following are evidence of brittle failure EXCEPT:

Correct Answer
verified

Which of the following statements about rock deformation is NOT true?

Correct Answer
verified

What is the difference between reverse faults and thrust faults?

Correct Answer
verified
Reverse faults occur where powerful hori...
View Answer

Why are anticlines and synclines not necessarily evident in the topography as hills and valleys?

Correct Answer
verified
Anticlines and synclines are structures ...
View Answer

A rock that undergoes sufficient stress to change its original shape has exceeded its:

Correct Answer
verified

Which of the following statements about folds is NOT true?

Correct Answer
verified

Which of the following statements concerning horsts and grabens is true?

Correct Answer
verified

Which one of the following rocks will most likely exhibit brittle failure upon stress?

Correct Answer
verified

How can geologists determine the type and direction of stress from the orientation of folds and direction of slip in faults?

Which of the following statements concerning stress is NOT true?

Correct Answer
verified

In geology, the term "stress" refers to:

Correct Answer
verified
C

A region exhibiting symmetrical or open synclines and anticlines is more likely to be located:

Correct Answer
verified

Why do geologists consider it important to make strike- and- dip measurements on rocks?

Correct Answer
verified
By mapping hundreds of strike- and- dip ...
View Answer

Rocks subjected to relatively high temperatures are more likely to:

Correct Answer
verified

All of the following statements about the history of folded rock are true EXCEPT:

Correct Answer
verified

Vertical displacement occurs in all of the following EXCEPT:

Correct Answer
verified

Exam 9: Earth Structures - Folds, Faults, and Fabrics

What is the difference between a strike- slip fault and a dip- slip fault?

Visible evidence of strain deformation is most readily seen in:

Correct AnswerverifiedShow Answer

What are domes and basins? How do they form?

Correct AnswerverifiedA dome is a subtle, oval- shaped bulge i...View AnswerShow Answer

The type of fault most commonly found in transform plate boundaries is a:

Correct AnswerverifiedShow Answer

All of the following are evidence of brittle failure EXCEPT:

Correct AnswerverifiedShow Answer

Which of the following statements about rock deformation is NOT true?

Correct AnswerverifiedShow Answer

What is the difference between reverse faults and thrust faults?

Correct AnswerverifiedReverse faults occur where powerful hori...View AnswerShow Answer

Why are anticlines and synclines not necessarily evident in the topography as hills and valleys?

Correct AnswerverifiedAnticlines and synclines are structures ...View AnswerShow Answer

A rock that undergoes sufficient stress to change its original shape has exceeded its:

Correct AnswerverifiedShow Answer

Which of the following statements about folds is NOT true?

Correct AnswerverifiedShow Answer

Which of the following statements concerning horsts and grabens is true?

Correct AnswerverifiedShow Answer

Which one of the following rocks will most likely exhibit brittle failure upon stress?

Correct AnswerverifiedShow Answer

How can geologists determine the type and direction of stress from the orientation of folds and direction of slip in faults?

Which of the following statements concerning stress is NOT true?

Correct AnswerverifiedShow Answer

In geology, the term "stress" refers to:

Correct AnswerverifiedC

A region exhibiting symmetrical or open synclines and anticlines is more likely to be located:

Correct AnswerverifiedShow Answer

Why do geologists consider it important to make strike- and- dip measurements on rocks?

Correct AnswerverifiedBy mapping hundreds of strike- and- dip ...View AnswerShow Answer

Rocks subjected to relatively high temperatures are more likely to:

Correct AnswerverifiedShow Answer

All of the following statements about the history of folded rock are true EXCEPT:

Correct AnswerverifiedShow Answer

Vertical displacement occurs in all of the following EXCEPT:

Correct AnswerverifiedShow Answer

Correct Answer
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Correct Answer
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A dome is a subtle, oval- shaped bulge i...
View Answer

Correct Answer
verified

Correct Answer
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Correct Answer
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Correct Answer
verified
Reverse faults occur where powerful hori...
View Answer

Correct Answer
verified
Anticlines and synclines are structures ...
View Answer

Correct Answer
verified

Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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C

Correct Answer
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Correct Answer
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By mapping hundreds of strike- and- dip ...
View Answer

Correct Answer
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Correct Answer
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Correct Answer
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