Claire L. Shepherd (a,b), Denise K. Kulhanek (c) & Christopher J. Hollis (b)
(a) School of Geography, Environment and Earth Sciences, Victoria University of Wellington, PO Box 600, Wellington 6140, New Zealand. E-mail: C.Shepherd@gns.cri.nz
(b) GNS Science, PO Box 30-368, Lower Hutt 5040, New Zealand.
(c) Integrated Ocean Drilling Program, Texas A&M University, College Station, Texas, USA.