Exam 15: Geologic Structures

In a _____ fault, the hanging-wall block moves up relative to the footwall block.

A normal fault results in crustal shortening.

The oldest rocks are found in the center of an eroded anticline.

A thrust fault is ____.

_____ are bends or wave-like features in layered rocks.

A ______ stress is caused by forces pulling away from one another.

The definition of an open fold is one with a horizontal hinge line.

Stress is ______.

On a geologic map, a symbol that looks like a cross indicates ____.

On a surface leveled by erosion the pattern of exposed beds of a plunging fold resembles that of the letter __.

Strain is force per unit area.

An anticline is a fold shaped like a(n) ____ with the oldest rock in the center of the fold.

A strike-slip fault can be right lateral or left lateral.

If a deformed material recovers its original shape after stress is reduced, the behavior is __.

_____ may cause a change in orientation, location, and shape of a rock body.

If a bed strikes north it must ________.

Normal and reverse faults are the most common types of _____.

Geologists sometimes find valuable ore deposits by studying the orientation of ____, fractures or cracks in a rock body along which no displacement has occurred.

A joint is a fracture or crack in bedrock along which displacement has taken place.

Collectively, the San Andreas fault system of California is a(n) _____.