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Exam 9: Crags, cracks, and Crumples: Crustal Deformation and Mountain Building

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Question 21

Multiple Choice

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Regions of continents that have not been subjected to orogeny during the past one billion years are termed ____________.

A) exotic terranes
B) accreted terranes
C) cratons

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Question 22

Multiple Choice

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On a geologic map,if the contacts between sedimentary rock units form a bull's eye pattern of concentric circles,with the youngest unit in the center,the underlying structure is a(n) ____________.

A) anticline
B) basin
C) dome
D) syncline

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Question 23

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Most fault surfaces,like joints,are roughly planar in orientation.

Mt.Everest,the tallest mountain in the world,is located on the continent of ____________.

In a ____________ fault,the fault plane is nonvertical and the hanging-wall block moves downward relative to the footwall block.

Mountain ranges are associated with modern and ancient convergent plate boundaries,but do not form in association with either divergent or transform plate boundaries.

A body of rock under high pressure is more likely to exhibit ____________ than is a body of rock at low pressure.

A fold shaped like an upside-down bowl is a(n) ____________.

In a ____________ fault,the fault plane is greater than 30° from horizontal and the hanging-wall block moves upward relative to the footwall block.

The outer portion of a craton,where deformed rocks are covered by sediments,is termed the ____________.

Force per unit area is termed ____________.

A hot body of rock is more likely to exhibit ____________ than is a cold body of rock.

On a geologic map,if the contacts between sedimentary rock units form a bull's eye pattern of concentric circles,with the oldest unit in the center,the underlying structure is a(n) ____________.

A body of rock affected by compressive stress will likely undergo ____________.

The balance between the weight of a mountain range and the buoyancy provided by the underlying mantle is termed ____________.

On a geologic map,if the contacts between sedimentary rock units form a series of parallel lines,with the youngest unit in the center,the underlying structure is a(n) ____________.

It is possible for offset along an oblique-slip fault to have both ____________ components.

A body of rock affected by tensile stress will likely undergo ____________.

Tectonic foliation,such as elongation of quartz grains,always occurs parallel to the original bedding plane of a body of rock.

Within a cratonic platform,sedimentary rocks always have a horizontal orientation.