Denise Fernandez¹, Nancy Bertler², Leigh Tait³, Craig L Stevens¹, Melissa Bowen⁴, Erik Behrens¹, Matt Pinkerton¹, Christina L Hulbe⁵, Ian Hawes⁶ and Natalie Robinson², (1)Earth Sciences New Zealand, Wellington, New Zealand, (2)Victoria University of Wellington, Wellington, New Zealand, (3)Earth Sciences New Zealand, Christchurch, New Zealand, (4)University of Auckland, School of Environment, Auckland, New Zealand, (5)University of Otago, Dunedin, New Zealand, (6)University of Waikato, Hamilton, New Zealand