PERTH, Australia, March 26 (TNSres) -- The University of Western Australia issued the following news: Thousands of artefacts, largely made from imported stone materials, have provided a unique record of Aboriginal occupation of the North West Shelf from Barrow Island in Western Australia's Pilbara region. The study, led by Sacramento State University with researchers from The University of Western Australia and Traditional Owners, has been published in the Quaternary Science Reviews. The Nort more PR