Cronulla Sand Dunes

The Cronulla Sand Dunes were formed when the sea reached its present level and began to stabilise about 9000 and 6000 BC. It is believed that the rivers eventually became blocked with accumulating sand and sediment as the sea level rose, As the rivers gradually silted up they were then forced to change their course and were led out to the sea via La Perouse rather than continue to maintain an opening in a ever-growing sand barrier near Wanda. This resulted in a tombolo ( a sand bar connecting an island to the mainland) being formed and joined Kurnell with the Cronulla Mainland.