You may need to install acrobat reader to obtain the pdf documents. Consider a meridional section of the sphere through the point p as in fig. Description, measurement and analysis of glacitectonically. In geometry, the stereographic projection is a particular mapping function that projects a. Stereographic projection is a powerful method, not just to solve relatively simple but important problems of dip and strike, but as an analytical tool for more complex structural geology. Tolkien library text id 86002a62 online pdf ebook epub library ragan this combination of text and lab book presents an entirely different approach to structural geology designed for undergraduate laboratory classes it provides a step by. A circleshaped projection part of a circle then occurs on our horizontal projection plane, and this projection is a stereographic projection of the plane. Geologic map and structural analysis general instructions. Software for stereographic projection there are several pieces of software that youd like to check out for that purposes. To perform the projection we connect points on the lower half of our great circle to the topmost point of the sphere or the zenith red lines in fig. Structural geology, tectonics and geodynamics form a coherent and interdependent.
The primary goal of structural geology is to use measurements of presentday rock geometries to uncover information about the history of deformation in the rocks, and ultimately, to understand the stress field that resulted in the observed strain and geometries. Structural geology is the study of the threedimensional distribution of rock units with respect to their deformational histories. Structural geology is the study of the threedimensional distribution of rock units with respect to. Tech 1st year 2019 department of applied geology,dr harisingh gour university sagar. Structural geology uses micro and mesoscale structures found in the rocks to. Researchers in structural geology are concerned with the orientations of planes and lines for a. The point p can be inserted using the protractor and joined to s. Orthographic projections for solving trueapparent dips and. The trend is the compass direction of the projection of the linear structure on a. Workbook 2 stereonets school of earth and environment.
As defined in our projection, the n and s poles would plot directly above and below the center of the stereonet. Pdf stereographic projection techniques for geologists. Two types of stereographic projection are commonly used. Stereographic projection is a method for analyzing the nature and orientation of.
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