1. School of Geography, Earth and Atmospheric Sciences, The University of Melbourne, Carlton, Victoria, Australia.
2. Centre for Accelerator Science, Australian Nuclear Science and Technology Organisation (ANSTO), Locked Bag 2001, Kirrawee DC, New South Wales 2232, Australia.
3. Dunkeld Pastoral Co. Pty Ltd Theda Station, PMB 14, Kununurra, Western Australia 6743, Australia.
4. Lettuce Create/Rock Art Australia, 16 Chaucer Parade, Strathpine, Queensland 4500, Australia.
5. Department of Geological Science, Human Evolution Research Institute, University of Cape Town, Rondebosch, 7701 Cape Town, South Africa