Coastal cliff erosion can create pillars when rock jointing or faulting are spaced at favourable int

Coastal cliff erosion can create pillars when rock jointing or faulting are spaced at favourable intervals and angles. These will continue to be sculpted by the waves and often become tourist hotspots (such as the Twelve Apostles in Australia) or a refuge for sea birds, which can nest safely from predators.

Gannet colony at Muriwai, New Zealand