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      The break-up of Rodinia, birth of Gondwana, true polar wander and the snowball Earth

      Journal of African Earth Sciences
      Elsevier BV

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          A neoproterozoic snowball earth

          Negative carbon isotope anomalies in carbonate rocks bracketing Neoproterozoic glacial deposits in Namibia, combined with estimates of thermal subsidence history, suggest that biological productivity in the surface ocean collapsed for millions of years. This collapse can be explained by a global glaciation (that is, a snowball Earth), which ended abruptly when subaerial volcanic outgassing raised atmospheric carbon dioxide to about 350 times the modern level. The rapid termination would have resulted in a warming of the snowball Earth to extreme greenhouse conditions. The transfer of atmospheric carbon dioxide to the ocean would result in the rapid precipitation of calcium carbonate in warm surface waters, producing the cap carbonate rocks observed globally.
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            Did the Breakout of Laurentia Turn Gondwanaland Inside-Out?

            P. HOFFMAN (1991)
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              The effect of solar radiation variations on the climate of the Earth

              M. BUDYKO (1969)
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                Author and article information

                Journal
                Journal of African Earth Sciences
                Journal of African Earth Sciences
                Elsevier BV
                1464343X
                January 1999
                January 1999
                : 28
                : 1
                : 17-33
                Article
                10.1016/S0899-5362(99)00018-4
                a7db5c42-8392-4cf9-8ef7-e4d86875feca
                © 1999

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

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