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Chapter 6 ¡ Cross Sections, Data Projection and Dip-Domain Mapping Fig. 6.12. Transferring data from map to cross section using an overlay (dashed line). a Data points are marked on the overlay. b The overlay is aligned with the section. c Points are projected onto the section (dotted lines). Filled circles are projected from known elevations; the open circle is an interpolated elevation
Fig. 6.13. Cross section A–A' from the structure contour map of Fig. 6.12. Vertical section, no vertical exaggeration. The short horizontal line is the apparent dip from the bedding attitude on the map
data onto the profile, it should be checked. Then the profile is constructed by connecting the dots (Fig. 6.13). If the correct shape of the profile is not clear, points can be added by interpolation between contours on the map. 6.3.2 Slicing With 3-D software a cross section can be constructed by slicing the 3-D model (Fig. 6.14). The slice automatically shows the apparent dips of beds and faults, contact locations, and the apparent thicknesses of the beds.