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Cronulla sand dunes
The Cronulla sand dunes are located on the Kurnell Peninsula in the local government area of Sutherland Shire, Sydney, New South Wales.
The Cronulla sand dunes are a protected area that became listed on the NSW State Heritage Register on 26 September 2003.〔(NSW Heritage Office Website - Listing Heritage Items - State Heritage Register - Item View )〕
==History==
The sand dune system which is also referred to as the Kurnell sand dune is estimated to be about 15,000 years old. It was formed when the sea reached its present level and began to stabilise, between 9000 and 6000 BC. The Georges, Cooks and Towra Rivers flowed to the south-east beneath the present sand dune system near Wanda and joined the ocean at Bate Bay. This resulted in the isolation of Kurnell which was an island from the mainland. The rivers eventually became blocked with accumulating sand and sediment as the sea level rose. As the rivers gradually silted up they were forced into changing their course and were led out to sea via La Perouse rather than continue to maintain an opening in an ever-growing sand barrier near Wanda. This resulted in a tombolo being formed and joined Kurnell with the Cronulla mainland. The deepest part of the ancient river channel now lies 100 meters below the surface at the southern end of the peninsula, near Wanda Beach.〔(Kurnell - A Pictorial History )〕
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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