Geometry and Geology

From geology's start as a science, geologists have studied the 3D relationships of rocks.  The geologic map has evolved to depict these relationships.

The stereo net is a graphical depiction of 3D relationships on a flat page or computer screen.  The net may look like a map, but it should more closely be interpreted as centered on a particular point to show geometric relationships.  Like a map, however, the stereonet takes three dimensions and displays them on two dimensions.  Planes become curved lines, and lines become points.

Stereo Net Geometry

Getting the plane orientation from the net

Lines on a geologic map:

Definitions:


Last revision 8/19/2013