Exam 11: Crags,cracks,and Crumples: Crustal Deformation and Mountain Building

During the formation of Pangea,Africa collided with North America and created the Appalachian Mountains.Which of the following mountain ranges is a modern analogue to the ancient Appalachian Mountains?

How were the mountains in the Basin and Range Province formed?

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)________.

In a ________ fault,the fault plane is non-vertical and the hanging-wall block moves downward relative to the footwall block.

If a fault plane is less than 30° from horizontal and the hanging-wall block moves upward relative to the footwall block,the fault is a ________ fault.

Normal,reverse,and thrust are all examples of ________ faults.

Regions where Precambrian metamorphic rocks are exposed at the surface are 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 ________.

The __________ is the succession of the opening of an ocean basin to form a passive margin,later followed by the closing of that ocean basin to form a collisional orogeny.

The rocks in the image below have been plastically deformed,resulting in a(n)__________.

How is stress different from strain?

The central portion of high curvature on a fold is termed the fold ________.

The rocks in the image below have been plastically deformed,resulting in a(n)__________.

Under which of these conditions would a body of rock be more likely to exhibit plastic behavior?

The sides of a fold,where curvature is at a minimum,are termed ________.

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)________.

Contrast brittle and plastic deformation.Cite an example of a structure associated with each.

In the image below,the rocks have been bent into an elongate trough.This is a(n)________.

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

How does the rate at which a body of rock is deformed affect its behavior?