Comments: Archaeological evidence shows the lake perimeters were camping areas with a diversity of activities. The main site of occupation was the narrow strip of land between North and Bibra Lake. Chert stone artefacts have been found to be relatively abundant in the area. The chertz can only be obtained from quarries presently below sea level which were last exposed 8,000 years ago. A site on the northern fringe of North Lake has a stratified deposit indicating its continual use for at least 2,000 years. [5] Walliabup [1] [2] [3]