The geological map below shows a folded quartzite bed (hatched) in which the western limb is vertical, and the eastern limb strikes due north and dips 45° to the east. A north-south trending dolerite dyke (solid black) that dips 45° westerly cuts across the folded bed. An east-west trending vertical fault (F-F) cuts across all the rock types. Explain why the western limbbof the fold is apparently not displaced by the fault. Compute the net slip on the fault F-F. Trace the eastern limb of the fold south of the fault F-F in the map below.