Secular increase in nutrient levels through the Phanerozoic; implications for productivity, biomass, and diversity of the marine biosphere

  title={Secular increase in nutrient levels through the Phanerozoic; implications for productivity, biomass, and diversity of the marine biosphere},
  author={Ronald E. Martin},

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  • H. Tappan
  • Environmental Science
    Journal of Paleontology
  • 1986
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