1. 1Antarctic Research Centre, Victoria University of Wellington, Wellington 6012, New Zealand
2. 2GNS Science, Lower Hutt 5011, New Zealand
3. 3Department of Geosciences, North Dakota State University, Fargo, North Dakota 58105, USA
4. 4Lamont-Doherty Earth Observatory, Columnbia University, Palisades, New York 10964, USA
5. 5Department of Geology, University of Otago, Dunedin 9054, New Zealand
6. 6School of Geography, Earth and Environmental Science, Victoria University of Wellington, Wellington 6012, New Zealand
7. 7Istituto Nazionale di Geofisica e Vulcanologia, Rome 00143, Italy
8. 8Berkeley Geochronology Center, 2455 Ridge Road, Berkeley, California 94709, USA
9. 9Earth Environment and Physics, Worcester State University, Worcester, Massachusetts 01602, USA
10. 10Department of Geoscience, University of Wisconsin−Madison, Madison, Wisconsin 53706, USA
11. 11Department of Marine Science, University of Otago, Dunedin 9054, New Zealand