At the end of Geology Walk is Razorback. It exemplifies coastal evolution. This massive limestone islet was carved away from the cliff by pounding surf. The point is cracking in two places, preparing to collapse and potentially form sea stacks. In the middle is an indentation. It may take hundreds of years, but eventually this will form a cave followed by an arch. Once that crumbles, huge rock columns will be created. This cycle has been repeated for 15 to 20 million years.