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Exam 9: Folds, faults, and Geological Maps

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Question 41

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A stress that is usually associated with spreading centers is known as _____ stress.

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Question 42

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A mountainous area can be classified as an area of low relief.

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Question 43

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Folds that are so overturned they are almost lying flat are said to be _____.

In the figure below from the Old Red Sandstone,the anticline will have the oldest rocks in the middle.

Places where bedrock is exposed at the surface are called _____ by geologists.

A fold that forms a trough with the youngest rocks in the middle is known as a(n)_____.

A stress that exerts equal force in all directions is known as _____ stress.

Stress that is different in different directions is said to be _____.

Describe the difference between a left-lateral and a right-lateral strike-slip fault.

Folds are said to be asymmetrical when one limb dips more steeply than the other.

A _____ map shows the locations,kinds,and orientation of rock units.

A permanent but gradual change in a rock due to flowing or bending is known as ductile deformation.

_____ is the force acting on a surface per unit area,which may be stronger in some directions than others.

The figure below shows a plunging anticline and syncline.

A formation is a unit of rock that can be distinguished from units above and below on the basis of geological contacts.