Topographical and geological mapsTopographical maps show features seen from above the earth surface whereas geological maps give us information about beneath the earth surface. |
What is a topographical map? |
What is a Geologic Map? Geologic units that are bent and warped into rounded wavelike shapes (crest Figure 2 and trough Figure 3) are called folds. ![]() In the Learning Resource Center you find a variety of topographical and geological maps. Study some of them and familiarise yourself with the features that are of interest to building studies. |
Topographic Maps |
Geological Maps |
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Figure 4 Topographic Map | Figure 5 Geological Map |
![]() Figure 6 Cross Section |
Cross-section A-B Geological maps are generally accompanied by vertical cross-sections, a stratigraphic column, a legend or key showing the structural symbols, ornament and colours used on the map, and a brief description of the geology. Vertical cross-sections are drawn across the map to illustrate the geological structure of the rocks, as shown in the opposite cross-section (Figure 6). |