Question 1

A well-sorted sandstone with ripple marks was most likely deposited as sand by a

Accepted Answer

A)   beach.
B)   glacier.
C)   river (near source) .
D)   alluvial fan.E) B) and C)
F) All of the above

Question 2

The removal of detritus from weathered rock at an outcrop is termed

Accepted Answer

A)   deposition.
B)   erosion.
C)   weathering.
D)   lithification.E) None of the above
F) C) and D)

Question 3

It is unusual for ________ to carry grains larger than sand.

Accepted Answer

A)   ice in glaciers
B)   water in rivers
C)   wind
D)   water at a seaside beachE) All of the above
F) B) and C)

Question 4

Notice the turbidity current in the image below.Briefly describe and sketch the deposit that will result.

Accepted Answer

As the turbidity current slows...

Question 5

Which environment would most likely produce sedimentary deposits characterized by poorly to moderately sorted,angular to subangular grains that consist of feldspar,quartz,and lithics (rock fragments) ?

Accepted Answer

A)   river
B)   glacier
C)   beach
D)   alluvial fanE) C) and D)
F) A) and B)

Question 6

Pulling a block of clay apart,resulting in the middle portion thinning and sinking,is an adequate analogy for

Accepted Answer

A)   passive margins and subsidence.
B)   foreland basins and diagenesis.
C)   rift basins and subsidence.
D)   intercontinental basins and diagenesis.E) All of the above
F) A) and D)

Question 7

Top set,foreset,and bottomset beds are indicative of ________ environments.

Accepted Answer

A)   alluvial fan
B)   lake bottom
C)   delta
D)   deep-marineE) None of the above
F) B) and D)

Question 8

Large layers of cross-bedded sand can be indicative of a ____________ environment.

Accepted Answer

A)   river
B)   desert
C)   shallow-marine
D)   deep-marineE) A) and B)
F) B) and C)

Question 9

When graded beds are observed in a rock outcrop,this tells geologists that a

Accepted Answer

A)   turbidity current deposited these beds,depositing finer material first.
B)   turbidity current deposited these beds,depositing coarser material first.
C)   slurry deposited these beds with little sorting.
D)   glacier deposited these beds,depositing coarser material first.E) A) and B)
F) C) and D)

Question 10

Sedimentary basins that form on the continental side of mountain ranges are called _________ basins.

Accepted Answer

A)   rift
B)   passive-margin
C)   foreland
D)   intracontinentalE) None of the above
F) A) and D)

Question 11

What attributes would a clastic sedimentary rock have if it had traveled far from its source and was carried in a current with uniform energy?

Accepted Answer

A clastic rock that had travel...

Question 12

Limestone is most likely formed in which of the following environments?

Accepted Answer

A)   shallow-marine clastic
B)   shallow-marine carbonate
C)   marine delta
D)   deep-marineE) All of the above
F) B) and C)

Question 13

Which of the following are most likely to preserve conditions of ancient environments on the Earth?

Accepted Answer

A)   intrusive igneous rocks
B)   extrusive igneous rocks
C)   metamorphic rocks
D)   sedimentary rocksE) None of the above
F) A) and C)

Question 14

Geologists call individual layers of sedimentary rocks ________,whereas several of them together are called ________.

Accepted Answer

A)   beds; strata
B)   strata; beds
C)   laminations; graded beds
D)   graded beds; laminationsE) B) and C)
F) A) and C)

Question 15

Which environment would most likely produce sedimentary deposits characterized by very well-sorted,very well-rounded grains that are nearly pure quartz?

Accepted Answer

A)   river
B)   glacier
C)   beach
D)   alluvial fanE) None of the above
F) B) and C)

Question 16

Two major sources of energy,coal and oil shale,are considered ________ sedimentary rocks.

Accepted Answer

A)   clastic
B)   biochemical
C)   organic
D)   chemicalE) A) and C)
F) B) and D)

Question 17

The breakdown of exposed rock into small fragments and dissolved ions is termed

Accepted Answer

A)   deposition.
B)   erosion.
C)   weathering.
D)   lithification.E) B) and D)
F) None of the above

Question 18

Sedimentary rocks are most likely to form

Accepted Answer

A)   near the Earth's surface.
B)   in high-temperature conditions.
C)   in high-pressure conditions.
D)   in the upper mantle.E) A) and B)
F) None of the above

Question 19

Because the velocity of sediment settling (deposition) is positively related to grain size for waterborne sediments,fluvial deposits are more likely than glacial deposits to

Accepted Answer

A)   be well sorted.
B)   include coarse grains,such as cobbles.
C)   include fine grains,such as clay.
D)   have angular grains.E) A) and B)
F) None of the above

Question 20

Chemical sedimentary rocks are classified primarily on the basis of

Accepted Answer

A)   grain size.
B)   degree of sorting.
C)   angularity.
D)   mineral composition.E) A) and B)
F) A) and D)

Exam 6: Pages of the Earths Past: Sedimentary Rocks

Chemical sedimentary rocks are classified primarily on the basis of

Correct AnswerverifiedShow Answer

Which environment would most likely produce sedimentary deposits characterized by poorly to moderately sorted,angular to subangular grains that consist of feldspar,quartz,and lithics (rock fragments) ?

Correct AnswerverifiedShow Answer

Sedimentary basins that form on the continental side of mountain ranges are called _________ basins.

Correct AnswerverifiedShow Answer

The breakdown of exposed rock into small fragments and dissolved ions is termed

Correct AnswerverifiedShow Answer

Two major sources of energy,coal and oil shale,are considered ________ sedimentary rocks.

Correct AnswerverifiedShow Answer

Geologists call individual layers of sedimentary rocks ________,whereas several of them together are called ________.

Correct AnswerverifiedShow Answer

When graded beds are observed in a rock outcrop,this tells geologists that a

Correct AnswerverifiedShow Answer

Which of the following are most likely to preserve conditions of ancient environments on the Earth?

Correct AnswerverifiedShow Answer

Limestone is most likely formed in which of the following environments?

Correct AnswerverifiedShow Answer

Pulling a block of clay apart,resulting in the middle portion thinning and sinking,is an adequate analogy for

Correct AnswerverifiedShow Answer

Which environment would most likely produce sedimentary deposits characterized by very well-sorted,very well-rounded grains that are nearly pure quartz?

Correct AnswerverifiedShow Answer

The removal of detritus from weathered rock at an outcrop is termed

Correct AnswerverifiedShow Answer

It is unusual for ________ to carry grains larger than sand.

Correct AnswerverifiedShow Answer

Notice the turbidity current in the image below.Briefly describe and sketch the deposit that will result.

Correct AnswerverifiedAs the turbidity current slows...View AnswerShow Answer

Because the velocity of sediment settling (deposition) is positively related to grain size for waterborne sediments,fluvial deposits are more likely than glacial deposits to

Correct AnswerverifiedShow Answer

Large layers of cross-bedded sand can be indicative of a ____________ environment.

Correct AnswerverifiedShow Answer

Sedimentary rocks are most likely to form

Correct AnswerverifiedShow Answer

What attributes would a clastic sedimentary rock have if it had traveled far from its source and was carried in a current with uniform energy?

Correct AnswerverifiedA clastic rock that had travel...View AnswerShow Answer

A well-sorted sandstone with ripple marks was most likely deposited as sand by a

Correct AnswerverifiedShow Answer

Top set,foreset,and bottomset beds are indicative of ________ environments.

Correct AnswerverifiedShow Answer

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Geologists call individual layers of sedimentary rocks ,whereas several of them together are called .

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As the turbidity current slows...
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A clastic rock that had travel...
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