Question 1

The axial plane divides a fold into top and bottom portions.

Accepted Answer

A) True 
 B)False

Question 2

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

Accepted Answer

A) horizontal beds 
B) vertical beds 
C) overturned beds 
D) intersecting beds 
E) branching beds

Question 3

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

Accepted Answer

A) reverse fault 
B) right lateral strike-slip fault 
C) normal fault 
D) left lateral strike-slip fault 
E) oblique fault

Question 4

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

Accepted Answer

A) Recumbent 
B) Anticlinal 
C) Domes 
D) Structural 
E) Open

Question 5

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

Accepted Answer

A) formation boundaries 
B) the location of fossils 
C) the orientation of a fold axis 
D) strike and dip 
E) the orientation of joints

Question 6

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

Accepted Answer

A) brittle 
B) elastic 
C) plastic 
D) tensional 
E) compressional

Question 7

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

Accepted Answer

A) True 
 B)False

Question 8

_____ stress results in rocks being shortened or flattened.

Accepted Answer

A) Elastic 
B) Compressive 
C) Tensional 
D) Orthogonal 
E) Horizontal

Question 9

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

Accepted Answer

A) X 
B) H 
C) V 
D) I 
E) T

Question 10

A thrust fault is ____.

Accepted Answer

A) a strike-slip fault 
B) one in which the hanging wall moves down 
C) a variety of reverse fault 
D) a variety of a normal fault 
E) a response to horizontal tensional stress

Question 11

_____ are fractures in bedrock along which sliding movement has taken place.

Accepted Answer

A) Joints 
B) Faults 
C) Planes 
D) Strikes 
E) Strains

Question 12

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

Accepted Answer

A) True 
 B)False

Question 13

A(n)____ trap is one of the best structures for holding oil.

Accepted Answer

A) monocline 
B) anticline 
C) basin 
D) synclinal 
E) reversed

Question 14

A rock that behaves in a ductile manner will bend under stress but will not return to its original shape.

Accepted Answer

A) True 
 B)False

Question 15

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

Accepted Answer

A) True 
 B)False

Question 16

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

Accepted Answer

A) True 
 B)False

Question 17

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

Accepted Answer

A) dip-slip faults 
B) strike-slip faults 
C) tensional faults 
D) compressional faults 
E) grabens

Question 18

A syncline is a fold shaped like an arch,with the oldest rocks in the center.

Accepted Answer

A) True 
 B)False

Question 19

The San Andreas Fault system can be described as _________.

Accepted Answer

A) normal dip-slip 
B) reverse oblique-slip 
C) left lateral strike-slip 
D) right lateral strike-slip 
E) thrust dip-slip

Question 20

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

Accepted Answer

A) True 
 B)False

Exam 6: Geologic Structures

The axial plane divides a fold into top and bottom portions.

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

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

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

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

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

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

_____ stress results in rocks being shortened or flattened.

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

A thrust fault is ____.

_____ are fractures in bedrock along which sliding movement has taken place.

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

A(n) ____ trap is one of the best structures for holding oil.

A rock that behaves in a ductile manner will bend under stress but will not return to its original shape.

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

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

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

A syncline is a fold shaped like an arch,with the oldest rocks in the center.

The San Andreas Fault system can be described as _________.

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