What are poles on stereonet?
On a Pole Plot, points are plotted on a stereonet which correspond to the orientation of either (1) linear features or (2) poles representing planes: If the data is linear in nature (e.g., stress trajectories), then the corresponding point on the stereonet represents this orientation directly.
How do you find the rake of a line on a stereonet?
Rake is simply the angle between the strike direction and the lineation trend. You can figure this out simply on a stereonet by just counting the grid squares along the great circle line. Rakes of 0° are at North and South, while a rake of 90° is in the middle.
What is trend and plunge in geology?
Trend – the direction of a line on a horizontal plane. We use the azimuth of a line to define its trend. Plunge (inclination) – the vertical angle, measured downward, between the horizontal and a line.
How is a plane plotted on a stereonet?
A stereonet should be visualized as the bottom half of a sphere. Planes intersect the sphere as great circles and lines intersect the sphere as points. Its helpful when starting out with stereonets to visualize the plane or line as it cuts through a 3-dimensional bowl (props may be helpful). the north pole of the net.
How to plot the trend of a stereographic line?
Steeply dipping planes will run close to the center of the stereonet and shallow dipping planes will be closer to the outer circle. Make a tick mark at the plane’s strike and then rotate your stereonet so that this mark is aligned with north. This is the same as plotting the trend of a line. Count 47°
How to calculate the plunge of a stereographic projection?
In some cases, you will need to read off the trend and plunge of a line from a stereonet. 1) Rotate the tracing paper such that the point representing the 3-D line is along the North-South axis of the stereonet. 2) To determine the plunge, count the grid squares between North and the intersection point.
How to change the defualt behavior of stereonet?
You can also change the defualt behavior by turning on or off labels in the Inspector, and then in Preferences check “Set to current settings in Inspector” and click Okay. v. 11.3.1 the binary file now saves the stereonet labels preferences for individual datasets.
How to turn on labels in stereonet 11.3?
The first time you run Stereonet v. 11.3, it will show these labels and ask whether you want to make them the defaults. After that, new windows will always open with your preference. You can turn on labels for any individual plot in the Stereonet Tab of the Inspector Palette.