Exam 15: Geologic Structures

A(n) _____ is a structure in which beds dip away from a common central point, and the oldest rocks are found in the center.

A fault in which movement is predominantly horizontal and parallel to a strike is called a strike-slip fault.

In cross section a structural basin looks like a ______.

All joints are a consequence of tectonic stress.

_____ folds have limbs that dip gently and the angle between the limbs is large.

_____ are usually associated with shortening of rock layers along convergent plate boundaries.

According to plate tectonic theory, the San Andreas fault is a transform boundary that separates the North American plate from the _____.

_____ stress results in a stretching or extension of material.

The side of the fault above the inclined fault surface is the ___.

A(n) ______ fault has both dip-slip and strike-slip components.

A thrust fault is a reverse in which the dip of the fault plane is at a low angle.

A map symbol similar to the letter "T" is used to record ______ on a map.

A dome is a structure in which beds dip away from a central point.

Once stress exceeds the elastic limit the rock will deform in a permanent way.

The side of a fault above an inclined fault surface is the hanging wall.

_____ stress results in rocks being shortened or flattened.

Reverse faults can either shorten or lengthen the Earth's crust.

A(n) _______ fold has been overturned to such an extent that the limbs are essentially horizontal.

A ____ uses standardized symbols and patterns to represent rock types and geologic structures.

The San Andreas fault in California is not a simple crack but ___.