Читать книгу Structural Analysis and Synthesis - Stephen M. Rowland - Страница 29

A geologic cross section can now be added to the topographic profile. The procedure is essentially the same as the topographic profile except structure contours are used instead of topographic contours. This is a very simple procedure for planar features because they will appear as straight lines and, unlike complex topography, only two points are needed to define a straight line.

1 Construct a topographic profile (Figure 2.12).

2 Lay the edge of a piece of paper along the section line, and mark and label on the paper at least two structural contour elevations for each contact.

3 Lay the labeled paper on the graph paper and transfer each structure contour point chosen to the proper elevation on the graph paper/profile (Figure 2.12).

4 Connect the points and draw the planar features using a ruler (Figure 2.12).