![]() They are equal area stereonet and equal angle stereonets. ![]() There are two widely used types (and may be more) of stereonets by structural geologists. Note the bottom half of a sphere is used. Figure 1: Steronet with a plane and its pole. Planes are lines are drawn on steronets as they intersect at the bottom of the sphere (Figure 1). The pole to the plane (“dip pole”) is at 90-degrees to the plane. What is important to someone who just started using steronets is to recognize that steronets represents half a sphere where the cross section has 360-degrees. This will be explained in depth in a different article. The reasoning behind which hemisphere we used is more conceptual than anything. If you are a mineralogist, you will use the top half of the spherical projection for crystallographic analysis. In structural geology, we use the bottom half or hemisphere of the spherical projection. This is a very useful tool because it can reduce the workload by avoiding lengthy calculations. They are used for analysis of various field data such as bedding attitudes, planes, hinge lines and numerous other structures. The stereonets is a type of standardized mapping system that allows us to represent various angles in 3D space on a 1D paper. ![]() The stereographic projection is a methodology used in structural geology and engineering to analyze orientation of lines and planes with respect to each other. ![]() Contact & Newsletter – Contact Him/Subscribe. ![]()
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