Emma Jayne Harrison, Scripps Institution of Oceanography, La Jolla, CA, United States, Jane K. Willenbring, University of Pennsylvania, Philadelphia, PA, United States, Gilles Y Brocard, University of Sydney, Sydney, Australia, Anthony Dosseto, University of Wollongong, Wollongong Isotope Geochronology Laboratory, School of Earth and Environmental Sciences, Wollongong, NSW, Australia, Alexandru Codilean, University of Wollongong, Wollongong, Australia, Reka H Fulop, University of Wollongong, School of Earth and Environmental Sciences, Wollongong, Australia and Klaus Wilcken, Australian Nuclear Science and Technology Organization, Kirrawee, Australia