1. The Australian Archaeomagnetism Laboratory, Department of Archaeology and History, La Trobe University, Bundoora, VIC, Australia
2. School of Earth, Atmosphere and Environment, Monash University, Clayton, VIC, Australia
3. Biology Department, University of Pisa, Pisa, Italy
4. Palaeo-Research Institute, University of Johannesburg, Auckland Park, Gauteng, South Africa