Description
The site comprises a system of seven watercourses within the Christmas Island National Park, including permanent and perennial streams, permanent springs, the Hugh's Dale waterfall, and most of the surface water on the island. The site is set within tropical rainforest and adjoins the coast. The streams originate from groundwater seepages and flow into the ocean having, over time, worn gullies into the coastal cliffs. It was designated on 21 October 2002 as Ramsar Site 1225, and is the first Australian Ramsar site to contain both surface and subterranean karst features. Area of Ramsar site is about 57 ha.
Interesting geological features of the Dales are travertine and rimstone formations of Hugh's Dale and the gully of Sydney's Dale, which closer at the sea gets up to 12 m deep and 9 m wide.
Read more about this topic: The Dales (Christmas Island)
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