Limestone Cliffs & The Great Souther Ocean
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The Limestone Coast features 20 sites of international or national significance. Mount Gambier’s Blue Lake fills the crater of a dormant volcano.
The Pool of Siloam at Beachport is seven times saltier than the sea. The megafauna fossils in the World Heritage Listed Naracoorte Caves are around half a million years old. The list goes on.
Much of the Limestone Coast region is low-lying, and was inundated by sea some 2 million years ago. It had previously also been flooded 15–20 million years ago. The plains are lined by rows of low sandhills parallel to the coast, created at times when the coastline was at that level.
Prior to white settlement, much of the land between the sandhills was swamp fed by streams and subject to inundation. A network of drains totalling 1450 km has been constructed to channel the water away through the sandhills to the ocean.
Important areas of wetland remain including the lakes and lagoons around the Murray Mouth, where the huge Murray River, by now reduced by draining off into the dry plains of Australia, finally meets the ocean between the Younghusband and the Sir Richard Peninsulas via a series of shallow lagoons including the Coorong, Lake Albert, Lake Alexandrina and Bool Lagoon.
Meanwhile areas of upland behind the Limestone Coast include the volcanic craters of Mount Gambier in South Australia.
*Canon EOS “KISS” D/SLR Camera
1/200, F/10, F/L 26mm, ISO 100
Also by Christopher J Chalk
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