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Exam 20: Mountain Belts and the Continental Crust

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Question 1

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Major mountain belts with higher mountain ranges tend to be geologically ___________ relative to those where the mountains are lower.

A) the same age
B) younger than
C) random in age
D) older than

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

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Question 2

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At the close of the Paleozoic, eastern North America was attached to what is now _______.

A) Europe and Asia
B) China and South America
C) India and Antarctica
D) Africa and China
E) Europe and Africa

F) D) and E)
G) B) and D)

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Question 3

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Delamination is the detachment of the continental crust from the oceanic crust.

A _____ terrane has rock types and ages that do not seem to be related to the rest of the geology of a mountain belt.

Orogenies are not accompanied by metamorphism and igneous activity.

Fold and thrust belts are found in many mountain regions.

A Precambrian shield, an area of no sedimentary rocks, covers much of eastern and northern Canada.

If the San Andreas Fault remains active, Los Angeles will continue northward and crash into ___.

The Grand Canyon, Ozark dome, Black Hills, and Adirondacks expose ________.

On the North American continent, the Appalachian Mountains extend from western Canada through the western United States into New Mexico.

During the last couple of decades, geologist have used a _____ approach to gain insight into the growth and wearing away of mountains.

Frequent earthquakes, offshore trenches, and active volcanoes perched on top of older rock are all indications of ____.

One important result of orogeny is that continental crust becomes thicker.

The more open the folds, the less intense the deformation in a mountainous region.

Most of the world's mountains existing today are a result of ____.

The Andes Mountains, where the South America Plate overrides the Nazca Plate, are a consequence of ocean-continent convergence.

The Appalachian Mountains are an example of ocean-ocean convergence.

Soapstone is a metamorphic rock composed of the mineral talc.

Late stage normal faulting in a mountain range is a result of _______.

A cycle of splitting of a supercontinent, opening of an ocean basin, followed by closing of the basin and collision of continents is known as a Wilson Cycle.