Faults in geological maps

Strike and dip can be reported in geological maps as shown in Fig. 5.8.

Figure 5.8: Strike and dip in geological maps.

Faults can also be represented in geological maps. The geological map of a single formation, say a sandy layer formation, plots the top of such formation with depth in contour lines (Fig. 5.9b). Normal faults are represented as thick lines with thickness proportional to the heave of the fault (Fig. 5.9c). Reverse and thrust faults (negative heave) are plotted as lines with intermittent triangles on the dipping side (Fig. 5.9d).

Figure 5.9: Block representation and equivalent geologic map of faults.