University of Bergen, Department of Earth Science, Bergen, 5007 Norway
University of California, Scripps Institution of Oceanography, La Jolla, CA 92093-0225 United States
University of Bergen, Department of Earth Science, Bergen, 5007 Norway ; University of Alberta, Department of Earth and Atmospheric Sciences, Edmonton, AB T6G2E3 Canada
University of Alberta, Department of Earth and Atmospheric Sciences, Edmonton, AB T6G2E3 Canada
University of Cape Town, Department of Geological Sciences, Rondebosch, 7701 South Africa