Reynisdrangar

Sea stacks are formed where waves have eroded portions of the headland. A free-standing stack, once a part of the headland, is made from material that was better able to withstand the forces of erosion. Reynisdrangar sea stacks are a good example of this type of erosion and were once most likely part of the headland. The bases of the stacks are made from columnar basalt, whereas the tuff that once surrounded them has eroded away, except for a small amount that sit at the very top of the stacks.