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Question 1 True or False (and why) : If the answer is true, write true. If it is false, tell me why it is false.
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Question 1True or False (and why)erodedQuestion 2True or False (and why):erodedQuestion 3

: If the answer is true, write true. If it is false, tell me why it is false.

When anticlines and domes are , the beds exposed in the center are older than the beds exposed away from the center.

 If the answer is true, write true. If it is false, tell me why it is false.

When synclines and basins are , the beds exposed in the center are older than the beds exposed away from the center.

Consider the following image.

Structure_5.jpg

What type of fault are you looking at?

Group of answer choices


  1. Normal Fault
  2. Reverse Fault
  3. Strike-slip Fault
  4. Subduction Zone
  5. Thrust Fault



Question 4

Considering the image in Question 3, how do you know it is the type of fault you chose?



Question 5

Considering the image in Question 3, at what type of plate boundary would you expect to find it?


  1. Convergent Boundary
  2. Divergent Boundary
  3. Hot Spot
  4. Transform Boundary



Question 6

Consider the following image:

Structure_1.jpg

This is a picture of _____________ fold.


  1. Non-plunging
  2. Overturned
  3. Plunging
  4. Recumbent




Question 7

Consider the image in Question 6. Is that structure an anticline or syncline? Justify your answer.



Question 8

Consider the following image

Structure_2.jpg

The best classification for this fault would be a:


  1. Left-lateral strike-slip fault
  2. Normal fault
  3. Reverse fault
  4. Right-lateral strike-slip fault



Question 9

Considering the image in Question 8, the best estimate of strike for this section of the San Andreas fault is:



  1. N15°E
  2. N15°W
  3. N45°E
  4. N45°W
  5. There is insufficient information to answer this question.



Question 10

Consider the following image.Structure_3.jpg

The best classification for this fault would be a:



  1. Left-lateral strike-slip fault
  2. Normal fault
  3. Reverse fault
  4. Right-lateral strike-slip fault
  5. There is insufficient information to answer this question.


Question 11

Consider again the image in Question 10. The block labeled A would best be called the:


  1. Anticline
  2. Axial Plane
  3. Foot wall
  4. Hanging wall
  5. Syncline



Question 12

Consider the following image of a hypothetical structure seen in map view. The map key at the right tells you the name of each of the layers. Below each name in parentheses is the particular geologic age in which that layer was formed. (I know we have not discussed geologic ages yet, but you don't need to know what these ages mean to answer the questions.)

Structure_4.jpg

What general structure is depicted here?


  1. Anticline
  2. Basin
  3. Dome
  4. Syncline



Question 13

True or False (and why): If the answer is true, write true. If it is false, tell me why it is false.

The structure in Question 12 is non-plunging.



Question 14

Knowing what you know about the ages of rock layers and their relation to structures, the oldest rock layer depicted in the image of Question 12 would be:


  1. H
  2. T
  3. R
  4. A
  5. E
  6. S





Question 15

The dip of the fault in Question 12's image would be:


  1. 10°NW
  2. 34°SW
  3. N10°W
  4. N10°E




Question 16

If the left side of the fault in Question 12 is the hanging wall, this fault would be a:



  1. Left-lateral strike-slip fault
  2. Normal fault
  3. Reverse fault
  4. Right-lateral strike-slip fault
  5. There is insufficient information to answer this question.


Question 17

Given all that you have seen from Questions 12-16, what can you say about the age of the fault?



Question 18

Now that we have considered structures in detail, lets go back and tie them to the three principal types of stress.

Structure_3.jpg

Which type of stress created this structure? How do you know?



Question 19

Which type of stress created this structure? How do you know?

Structure_5.jpg



Question 20

Rocks in the figures in Questions 18 and 19 both behaved in a _____________ way.

  1. Brittle
  2. Ductile
  3. Malleable
  4. Sectile
  5. Tensile


Question 21

In actual geologic settings, geologic maps have abundant strike-and-dip symbols on them and rarely are they so "clean" as the map in Question 12. In fact, they more commonly look like the following image.

Structure_6.jpg

That said, regardless of how chaotic it might appear, we can get the general sense of what is going on by looking at the orientation of the strike-and-dip symbols. This geologic map labels the feature at the bottom as the Benmoreite Dome.

Given what you know of strike and dip, is this a dome? Why or why not?

(Not that it matters to the question, but benmoreite is basically andesite with little to no quartz.)


Question 22

Consider the following image.

Structure_7.jpg

The dip of all three layers is:

  1. 30°NW
  2. 30°SW
  3. N30°W
  4. N30°SW


Question 23

Assuming the horizontal and vertical scale in the figure for Question 22 are the same, what is the true thickness of the yellow layer?

  1. l0.625 km
  2. 1.25 km
  3. 2.5 km
  4. 5.3 km
  5. There is insufficient information to answer this question.



Question 24

The strike of all three layers in Question 22's figure is:


  1. 30°NW
  2. 30°SW
  3. N45°W
  4. N45°SW
  5. There is insufficient information to answer this question.




Question 25

Why can't we determine the true thickness of either the blue or grey layers in Question 22's figure?

Structure_1.jpg
Structure_2.jpg
Structure_3.jpg
Structure_4.jpg
S
Hysperia Shale
E
Fault
H
(Devonian)
T
Tiberius Sandstone
(Silurian)
42/
10
A
R
Rutgers Marl
(Ordovician)
E
A
Anders Tufa
(Ordovician)
R
44
E
Eamond's Limestone
(Ordovician)
S
Soran Dolostone
(Cambrian)
T
10
-47
A
34
Map Key
H
N
R
Map view of faulted
geologic structure with
labeled strike and dip
12
T
symbols.
Structure_5.jpg
Structure_6.jpg
Structure_7.jpg

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