Flexi Says: Wave erosion occurs almost everywhere the ocean meets land, since the continual action of waves wears away rock and sediment. However, some coastlines experience more rapid erosion than others. Shorelines with unconsolidated sediment, such as sand and gravel, are eroded faster than rocky shores. Areas that experience storms and sea level rise also experience more rapid erosion. In Australia, the coast of New South Wales (NSW) has a history of damaging coastal erosion caused by storms.