All this limestone began to form more than 50 million years ago when the continent broke away from Antarctica and the sea flooded into the subsequent gap. The calcium carbonate shells of tiny sea creatures accumulated on the ocean floor, eventually forming into a chalky layer of limestone. More recently, the sea retreated and the southern part of Australia tilted, lifting up the 100m-high sea cliffs that line the southern coast of the Nullarbor today.
All this limestone began to form more than 50 million years ago when the continent broke away from Antarctica and the sea flooded into the subsequent gap. The calcium carbonate shells of tiny sea creatures accumulated on the ocean floor, eventually forming into a chalky layer of limestone. More recently, the sea retreated and the southern part of Australia tilted, lifting up the 100m-high sea cliffs that line the southern coast of the Nullarbor today.
All this limestone began to form more than 50 million years ago when the continent broke away from Antarctica and the sea flooded into the subsequent gap. The calcium carbonate shells of tiny sea creatures accumulated on the ocean floor, eventually forming into a chalky layer of limestone. More recently, the sea retreated and the southern part of Australia tilted, lifting up the 100m-high sea cliffs that line the southern coast of the Nullarbor today