[1
]Centre for Earth Evolution and Dynamics, Department of GeosciencesUniversity of Oslo
Oslo Norway
[2
]Alfred Wegener InstituteHelmholtz‐Centre for Polar and Marine Research Bremerhaven
Germany
[3
]Institute for Marine and Antarctic StudiesUniversity of Tasmania Hobart Tasmania Australia
[4
]TNO, The Geological Survey of the Netherlands Utrecht The Netherlands
[5
]Geological Survey of Denmark and Greenland Copenhagen Denmark