Problem 3.1

Assume the plane we would like to plot has an attitude of \( 126^\circ, 54^\circ SW \)

The strike is \( 126^\circ \) and the dip is \( 54^\circ SW \)

1. Plot strike on outer circle (primative circle)
2. Rotate strike to North
3. Count the dip in from the east (or west) and plot the point
4. Draw Great circle from North to south through dip point
5. Rotate back so north is north

Assume the pole we could like to plot has an attitude of \( 255^\circ, 34^\circ \)

The trend is \( 255^\circ \) and the plunge is \( 34^\circ \)

1. Plot trend on the outer / primative circle
2. Rotate trend to East-West line
3. Count the plunge in from the outside, mark the point
4. Rotate north back to north

Problem 3.3

Plot the pole to the plane with an attitude of \(305^\circ, 72^\circ NE\)

The strike is \(305^\circ \) and the dip is \( 72^\circ NE\)

1. Plot strike on the outer / primative circle
2. Rotate strike to North
3. Count the dip in from the outside along the east west line, mark the point
4. Optional: Draw the line of strike from the strike point through the dip point
5. Count 90 degrees from the dip point along the east west line, mark the pole to the plane

Problem 3.4

Determine the intersection between \( 036^\circ, 32^\circ NW \) and \(089^\circ, 80^\circ S \)

The strike of the first plane is \( 036^\circ \) and the dip is \( 32^\circ NW \). The strike of the second plane is \(089^\circ \) and the dip is \( 80^\circ S \)

1. First Plane
2. Plot the first strike on the outer / primative circle
3. Rotate first strike to North
4. Count in by the first dip along the east west line, mark this dip point
5. Draw the First Plane along the great circle going through the strike and dip points
6. Rotate back to North
7. Second Plane
8. Plot the second strike on the outer / primative circle
9. Rotate second strike to North
10. Count in by the second dip along the east west line, mark this dip point
11. Draw the Second Plane along the great circle going through the strike and dip points
12. Rotate back to North
13. Intersection
14. The intersection of the two lines is the intersection of the planes, it is a line, but is plotted as a point on the stereonet
15. Mark the intersection
16. Rotate the intersection point to the East West line
17. Mark the outer / primative circle along the East West line, this will be the trend (don't read it yet)
18. Count in to find the plunge of the intersection
19. Rotate back to north
20. Read the value of the intersection's trend that you marked on the outer / primative circel

Problem 3.5

Plot the plane \(165^\circ, 50^\circ E\) and a fault slip motion (pitch or rake) of \( 45^\circ \)

1. Plot Plane
2. Plot the strike on the outer / primative circle
3. Rotate strike to North
4. Count in by the dip along the east west line, mark this dip point
5. Draw the Plane along the great circle going through the strike and dip points
6. Rotate back to North
7. Plot Pitch
8. Rotate Plane's strike to North
9. From North, count down the small circle along the plane the amount of the pitch, mark the pitch point
10. Measure Pitch
11. Rotate the Pitch point to the East West Line
12. Mark the outer / primative circle along the East West line, this will be the trend (don't read it yet)
13. Count in to find the plunge of the pitch
14. Rotate north back to north
15. Read the value of the pitch's trend that you marked on the outer / primative circel