Late Neogene Arctic Paleoceanography: Micropaleontology, Stable Isotopes, and Chronology

  • Yvonne Herman
  • J. K. Osmond
  • B. L. K. Somayajulu


The climatic history of the Arctic has been a matter of debate ever since the systematic sampling and study of seafloor sediments commenced several decades ago. The early Soviet investigators (Sacks, Belov, and Lapina, 1955), using radium distribution in sedimentary cores, estimated that rates of sediment accumulation in the entire basin were 1.2–2 cm/103 yr. These values are an order of magnitude higher than rates based on uranium series isotope dates (Ku and Broecker, 1967; Herman and Osmond, 1984; Chapter 22 of this volume). Linkova (1965) was the first to determine the magnetic polarity of Arctic basin sedimentary cores. Her studies demonstrated conclusively that sediment accumulation rates on topographic highs, such as the Lomonosov Ridge, are extremely slow, ~1–3 mm/103 yr. Similar results were obtained for the Alpha-Mendeleev Rise (Hunkins et al., 1971; Aksu, 1985a; Aksu and Mudie, 1985).


Arctic Ocean Coarse Fraction Benthic Foraminifera Planktonic Foraminifera Sediment Accumulation Rate 
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© Van Nostrand Reinhold 1989

Authors and Affiliations

  • Yvonne Herman
  • J. K. Osmond
  • B. L. K. Somayajulu

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