Glacier scratches
The sign said - You are looking at a part of the landscape that was covered by ice about 280 million years ago. This polished and scratched rock surface (glacial pavement) has made Hallett Cove famous. ... As the ice moved northwards over this ancient landscape, sand and silt in the base of the ice polished the bedrock to a smooth finish-like a giant piece of sandpaper. Larger rock fragments made the long straight scratches known as glacial stiations. These were exposed when the ice melted.
Aboriginal settlers arrived on the continent from Southeast Asia about 40,000 years before the first Europeans began exploration in the 17th century. No formal territorial claims were made until 1770, when Capt. James COOK took possession in the name... ... read more 
