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________ is composed of alternating bands of light and dark silicate minerals.


A) Marble
B) Mica schist
C) Phyllite
D) Gneiss

E) C) and D)
F) None of the above

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The major role of thermal energy (heat) in metamorphism is ________.


A) reducing the strength of rocks so that stress can be an effective agent of change
B) increasing the processes of dissolution and flow of different minerals
C) driving chemical reactions that lead to recrystallization
D) providing energy for the physical changes that occur during metamorphism

E) A) and D)
F) C) and D)

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Most limestone has a biochemical origin.

A) True
B) False

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The change from a sediment to a sedimentary rock typically involves burying the sediment.

A) True
B) False

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confining pressure differential stress melting chemical fluids

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melting

Slate is associated with high-grade metamorphism.

A) True
B) False

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False

What type of stress (pressure)is illustrated in the diagram below? What type of stress (pressure)is illustrated in the diagram below?

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Which rock type is associated with a high-energy environment (such as a very turbulent stream) ?


A) conglomerate
B) shale
C) chert
D) none of these

E) B) and C)
F) A) and C)

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Death Valley is a site where ________ sedimentary rocks are common.


A) detrital
B) evaporite
C) biochemical
D) clastic

E) A) and B)
F) B) and C)

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An important condition for the formation of coal is ________.


A) abundant plant and animal life in a region
B) decomposition of organic matter with abundant oxygen
C) incomplete decomposition of organic matter due to a lack of oxygen
D) acid rich waters that reduce the organic matter to pure carbon

E) A) and B)
F) A) and C)

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Explain why sedimentary rocks are particularly important in studying the past history of the Earth.

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Sedimentary rocks form at the surface of...

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Igneous rock is formed ________.


A) by the weathering of preexisting rocks
B) by changes in mineral composition
C) at great depth within Earth
D) by crystallization of magma

E) All of the above
F) B) and D)

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The most abundant chemical sedimentary rock is ________.


A) limestone
B) dolomite
C) chert
D) rock salt

E) A) and C)
F) B) and C)

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Why do crystals in a magma stop growing during cooling?


A) They run out of space.
B) They run out of heat.
C) They become too dense to grow.
D) The pressure from rocks above becomes too great and the magma stops growing crystals.

E) A) and B)
F) A) and C)

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A

Igneous rocks are composed primarily of sulfate-type minerals.

A) True
B) False

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Which of the following places is well known for its intrusive igneous rocks that were exposed by erosion?


A) Mount St.Helens Volcano
B) Hawaii
C) Yosemite National Park
D) Yellowstone National Park

E) A) and C)
F) None of the above

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The minerals gold,silver and mercury are often found in ________.


A) hydrothermal veins
B) the lower parts of an intrusion
C) disseminated deposits
D) alteration of limestone

E) None of the above
F) A) and B)

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Probably the single most characteristic feature of sedimentary rocks is ________.

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layering (...

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shale sandstone breccia conglomerate

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Which of the following is not a dark silicate mineral?


A) biotite
B) amphibole
C) quartz
D) pyroxene

E) C) and D)
F) B) and C)

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