400 million years ago Australia was still part of the content called Gondwanaland, small plants had already commenced growing on the dry land and some marine creatures had probably evolved into insects but these were early days for complex lifeforms on land. Vegetation was basic with probably nothing tree-like existing. This was also tens of millions of years before dinosaurs arose. Normally the rocks from this period would be buried deep beneath the current surface of the earth but there is an anticline, where the rock layer has been bent upwards, in the suburb of Deakin that was further expose because it was also the site of white clay mining that was used to help build Canberra.
