SO461 Lab, Fall 2008

Stereo Net Lab

Objectives:

1. Understand the concepts for dip and strike
2. Plot a plane on a stereo net
3. Determine the dip and strike of a plane from its projection.
4. Plot a line on a stereo net.
5. Determine the orientation of a line from its projection.
6. Understand how we can use a line (the pole) to represent a plane.

References:

Projections:

·         Equal area, Lambert Azimuthal, Schmidt

·         Equal angle, Stereographic, Wulff

Grid

·         Polar

·         Equatorial

Normally use equatorial equal area net, lower hemisphere

Definitions you should understand:

• Dip

• Strike

• Pole

Plot the following planes on your stereo net, along with their poles:

• N30E, 45NW
• N30E, 45SE
• N30W, 30SW
• N30W, 60SW

Plot the following lines on your stereo net:

• Trend 135, dipping 10
• Trend 135, dipping 60
• Trend  240, dipping 80
• Trend 350, dipping 90

Determine the orientations of the following planes on the stereonet:

Determine the orientation of the line where these two planes intersect: