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      Chemical evolution of seawater during the Phanerozoic

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      Geochimica et Cosmochimica Acta
      Elsevier BV

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          The carbonate-silicate geochemical cycle and its effect on atmospheric carbon dioxide over the past 100 million years

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            Cenozoic deep-Sea temperatures and global ice volumes from Mg/Ca in benthic foraminiferal calcite

            A deep-sea temperature record for the past 50 million years has been produced from the magnesium/calcium ratio (Mg/Ca) in benthic foraminiferal calcite. The record is strikingly similar in form to the corresponding benthic oxygen isotope (delta(18)O) record and defines an overall cooling of about 12 degrees C in the deep oceans with four main cooling periods. Used in conjunction with the benthic delta(18)O record, the magnesium temperature record indicates that the first major accumulation of Antarctic ice occurred rapidly in the earliest Oligocene (34 million years ago) and was not accompanied by a decrease in deep-sea temperatures.
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              GEOLOGIC HISTORY OF SEA WATER

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                Author and article information

                Journal
                Geochimica et Cosmochimica Acta
                Geochimica et Cosmochimica Acta
                Elsevier BV
                00167037
                November 2002
                November 2002
                : 66
                : 21
                : 3733-3756
                Article
                10.1016/S0016-7037(01)00884-5
                bc824309-663d-4278-bcf5-8d2d6c6df205
                © 2002

                http://www.elsevier.com/tdm/userlicense/1.0/

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