Question 1

Detrital sediment texture is identified on the basis of:

Accepted Answer

A)   the mineral composition of the particles.
B)   the way the sediments clump together in the formation of sedimentary rocks.
C)   the relative percentages of each of the three categories of particle sizes.
D)   the size, shape, and arrangement of the particles.E) B) and C)
F) A) and D) D

Question 2

Which of the following statements does NOT apply to all detrital sedimentary rocks?

Accepted Answer

A)   They are composed of particles that have been cemented together.
B)   They possess a clastic texture.
C)   They have undergone compaction and recrystallization.
D)   They are classified on the basis of their particle sizes.E) A) and B)
F) B) and D)

Question 3

All of the following statements concerning conglomerates and breccias are true EXCEPT:

Accepted Answer

A)   they are coarse grained.
B)   their grain shapes indicate relative transport distances.
C)   they are chemical sedimentary rocks.
D)   they may contain fine matrix material.E) None of the above
F) All of the above

Question 4

Describe what is known about the formation of dolostone.

Accepted Answer

Dolostone is similar in structure and ap...

Question 5

Which of the following sediment- moving processes is most effective in delivering sediment from the transitional environments to the subduction zone?

Accepted Answer

A)   Turbidity currents.
B)   Wind.
C)   River currents.
D)   Waves, tides, and ocean currents.E) A) and B)
F) None of the above

Question 6

All of the following statements about cross- bedding are true EXCEPT:

Accepted Answer

A)   cross- bedding is usually formed by deposition of sediments from wind or water.
B)   cross- beds form when particles drop from still water.
C)   changes in direction of wind or water currents are recognizable within cross- beds.
D)   cross- beds are formed when a sedimentary layer is deposited at an angle to the underlying bed.E) None of the above
F) A) and C)

Question 7

Which one of the following may reveal the direction of a stream current?

Accepted Answer

A)   Mudcracks.
B)   Asymmetrical ripple.
C)   Graded bedding.
D)   Symmetrical ripple.E) A) and B)
F) A) and C)

Question 8

Biogenic limestones that represent deep- marine environments are characterized by:

Accepted Answer

A)   sponge skeletons.
B)   foraminifera skeletons.
C)   radiolaria skeletons.
D)   diatom skeletons.E) All of the above
F) A) and C)

Question 9

Graded beds are commonly formed by:

Accepted Answer

A)   lateral migration of a sand dune.
B)   drying and cracking of mud.
C)   particles settling at different rates.
D)   small waves or ripples.E) None of the above
F) A) and B) C

Question 10

What causes the coloration of sedimentary rocks?

Accepted Answer

The color in sedimentary rock is most fr...

Question 11

Sandstones are classified on the basis of:

Accepted Answer

A)   color.
B)   cleavage.
C)   mineralogy of sand grains.
D)   shape of their constituent particles.E) A) and B)
F) B) and C)

Question 12

Continental sedimentary environments are characterized by:

Accepted Answer

A)   biogenic cherts.
B)   biogenic limestones.
C)   detrital sediments.
D)   dolostone deposits.E) A) and B)
F) A) and C)

Question 13

How does cross- bedding form?

Accepted Answer

Sediment that is medium to coarse- grain...

Question 14

Common cementing agents include all of the following EXCEPT:

Accepted Answer

A)   iron compounds.
B)   olivine.
C)   silica.
D)   calcium carbonate.E) A) and D)
F) C) and D)

Question 15

Which of the following transport media generally results in the most well- sorted sediments?

Accepted Answer

A)   Rivers.
B)   Landslides.
C)   Wind.
D)   Glaciers.E) B) and C)
F) C) and D)

Question 16

Inorganic chemical sedimentary rocks are derived from:

Accepted Answer

A)   the dissolved products of chemical weathering that precipitate from solution.
B)   igneous rock exposures.
C)   sedimentary rock exposures.
D)   metamorphic rock exposures.E) B) and C)
F) B) and D)

Question 17

How do the particles of detrital sedimentary rocks become cemented together?

Accepted Answer

After deposition of sediments, water oft...

Question 18

A sandstone with more than 25% feldspar and poorly sorted, angular grains is probably a(n) :

Accepted Answer

A)   quartz arenite.
B)   quartzite.
C)   arkose.
D)   graywacke.E) B) and C)
F) A) and D)

Question 19

More than half of all sedimentary rocks are:

Accepted Answer

A)   conglomerate and breccia.
B)   mudstone.
C)   limestone.
D)   sandstone.E) C) and D)
F) B) and D) B

Question 20

Which of the following statements concerning the formation of coal is NOT true?

Accepted Answer

A)   Organic matter changes from peat, to lignite, to bituminous coal, and finally into anthracite coal.
B)   Coal forms from the decomposition of organic matter in the absence of oxygen.
C)   Coal is composed primarily of the remains of microorganisms.
D)   The environment for deposition of coal is usually a swamp.E) A) and D)
F) All of the above

Exam 6: Sedimentary Processes, Environments, and Rocks

Detrital sediment texture is identified on the basis of:

Correct AnswerverifiedD

Which of the following statements does NOT apply to all detrital sedimentary rocks?

Correct AnswerverifiedShow Answer

All of the following statements concerning conglomerates and breccias are true EXCEPT:

Correct AnswerverifiedShow Answer

Describe what is known about the formation of dolostone.

Correct AnswerverifiedDolostone is similar in structure and ap...View AnswerShow Answer

Which of the following sediment- moving processes is most effective in delivering sediment from the transitional environments to the subduction zone?

Correct AnswerverifiedShow Answer

All of the following statements about cross- bedding are true EXCEPT:

Correct AnswerverifiedShow Answer

Which one of the following may reveal the direction of a stream current?

Correct AnswerverifiedShow Answer

Biogenic limestones that represent deep- marine environments are characterized by:

Correct AnswerverifiedShow Answer

Graded beds are commonly formed by:

Correct AnswerverifiedC

What causes the coloration of sedimentary rocks?

Correct AnswerverifiedThe color in sedimentary rock is most fr...View AnswerShow Answer

Sandstones are classified on the basis of:

Correct AnswerverifiedShow Answer

Continental sedimentary environments are characterized by:

Correct AnswerverifiedShow Answer

How does cross- bedding form?

Correct AnswerverifiedSediment that is medium to coarse- grain...View AnswerShow Answer

Common cementing agents include all of the following EXCEPT:

Correct AnswerverifiedShow Answer

Which of the following transport media generally results in the most well- sorted sediments?

Correct AnswerverifiedShow Answer

Inorganic chemical sedimentary rocks are derived from:

Correct AnswerverifiedShow Answer

How do the particles of detrital sedimentary rocks become cemented together?

Correct AnswerverifiedAfter deposition of sediments, water oft...View AnswerShow Answer

A sandstone with more than 25% feldspar and poorly sorted, angular grains is probably a(n) :

Correct AnswerverifiedShow Answer

More than half of all sedimentary rocks are:

Correct AnswerverifiedB

Which of the following statements concerning the formation of coal is NOT true?

Correct AnswerverifiedShow Answer

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D

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Dolostone is similar in structure and ap...
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C

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The color in sedimentary rock is most fr...
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Sediment that is medium to coarse- grain...
View Answer

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After deposition of sediments, water oft...
View Answer

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B

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