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Laboratory Manual for Introductory Geology

Bradley Deline, Randa Harris, Karen Tefend

Chapter 12

Crustal Deformation - all with Video Answers

Educators

Chapter Questions

01:32

Problem 1

For the following diagram, determine the correct map symbol that would go in the oval box.

Adam Conner
Adam Conner
Numerade Educator
01:32

Problem 2

For the following diagram, determine the correct map symbol that would go in the oval box.

Adam Conner
Adam Conner
Numerade Educator
00:36

Problem 3

Using Google Earth, search for the following area in Pakistan: $\mathbf{2 7} \mathbf{5 0} \mathbf{3 5} . \mathbf{0 0} \mathbf{N}$ $\mathbf{6} 7 \mathbf{1 0} \mathbf{0 3} \cdot \mathbf{7 0} \mathbf{E}$. Zoom out to an eye altitude of approximately 25,000 feet. The inclined layers in these folded rocks can be easily seen. As you view them, in which compass direction are the beds dipping?
a. Northeast $(\mathrm{NE})$
b. Southeast (SE)
c. Northwest (NW)
d. Southwest (SW)

Chris Johnson
Chris Johnson
Numerade Educator
03:43

Problem 4

(6 pts) Examine the map and the ages of the rock layers. Based on your interpretation, label the structures and add appropriate symbols to the map to show the axis of the folds. What kind of folds are present in this area? Explain how you came to this conclusion.

Danielle Ashley
Danielle Ashley
Numerade Educator
00:19

Problem 5

(6 pts) Along the red line starting at point 'A' there are four faults indicated by bold black lines (they are also marked on the cross section in Part C). Examine the age of the rocks and the faults themselves. What type of faults are these? Explain how you came to this conclusion.

Lily An
Lily An
Numerade Educator
00:28

Problem 6

(12 pts) Complete the following geological cross section based on your understanding of the geological structures present in the area.

Emily Marty
Emily Marty
Numerade Educator
03:32

Problem 7

Search for $\mathbf{3} \mathbf{8} \mathbf{0 4} \mathbf{3 6 . 0 0 N} \mathbf{1 0 9} \mathbf{5 5} \mathbf{2 6 . 6 1} \mathbf{W}$ and zoom to an eye altitude
of $20,000 \mathrm{ft}$, make sure to note your geographic location. (hint: re-read the section in the course content unit on Faults and in this lab manual)
a. You are looking at the surface expression of many fault lines (fault scarp) with the hanging wall occupying the valleys and the foot wall representing the plateaus, what kind of faults are they?
b. What would we call these paired features?
c. What type of stress created these features?
d. The amount of displacement (extension or shortening) in the area can be calculated by the following equation based on the angle of the fault surface:
e. How many of these faults would you need to make this area (Utah) a mile longer? Remember there are 5,280 feet in a mile.

Suzanne W.
Suzanne W.
Numerade Educator
01:28

Problem 8

Search for $\mathbf{2 2} \mathbf{4 8} \mathbf{4 5 . 6 3 S} \mathbf{1 1} 7 \mathbf{2 0} \mathbf{1 2 . 8} \mathbf{5} \mathbf{E}$ and zoom to an eye altitude of 25
miles. This feature is caused by the folding of rocks.
a. Imagine you are a geologist trying to determine what is going on in the area. How could you tell if this large bullseye structure is a dome or a basin (State whether this is a dome or basin, and give two different ways to tell them apart)?
b. Examine the feature $\sim 10$ miles southwest of the previous feature. Is this fold horizontal or plunging, how can you tell?

Karly Williams
Karly Williams
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