Structure Contours Pdf Contour Line Map This is an introduction to the geometry and construction of structure contours on a planar geological surface, using map patterns. part of "the shear zone" video channel. A graphical method developed for the construction of structure contours for inclined planar surfaces has been extended to curved or folded surfaces with cylindrical geometries and horizontal axes.
Lab 4a1 Structure Contours Pdf In the top map the planar surface is oriented n20e 40se (orientations for the other two are given on the map). draw and label a strike line for the top surface of a stratigraphic formation so that the strike line truncates against the equivalent structure contour for the fault. Mapping the structural contours across a stratigraphic unit reveals a three dimensional picture of its subsurface distribution, deformation, structural relief, and stratigraphic displacement along faults. Students construct structure contour lines for a "dipping bed" in our classroom and on a geologic map. in my class, this is a multi day activity. One suggestion is to start where the surface is best constrained, where you have the maximum density of points, and then to work to areas where the surface is less constrained.
Algorithm Surface Reconstruction From 2 Planar Contours Stack Overflow Students construct structure contour lines for a "dipping bed" in our classroom and on a geologic map. in my class, this is a multi day activity. One suggestion is to start where the surface is best constrained, where you have the maximum density of points, and then to work to areas where the surface is less constrained. Assuming the coal seam is planar, these structure contours can be drawn in parallel to the 200m structure contour. the rest of the structure contours for the coal seam can be drawn in at the same spacing across the map. A single planar layer of rock is shown by the stippled area of the map. print this map out and construct structure contours for the south boundary of the stipled rock layer. notice that this map has the same topography as our map 1 above, but the geology is quite different. The block diagram below illustrates structure contours of a perfectly planar surface (blue). notice that the structure contours are (i) straight lines, (ii) parallel to each other and (iii) equally spaced. In this video, we show how to extract a planar contour from a surface and create geometrical elements, measure distances and use tolerancing tools to analyze it.
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