Tag Archives: sulfur

Seawater isotope ratios through time: sulfur and carbon


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Low sea levels = heavy carbon, light sulfur in seawater

  • Low sea levels = more land space for plants = plants use lighter carbon = lighter carbon stuck on land = heavy carbon in the sea!
  • Low sea levels = less habitat for sulfate-reducing bacteria = less light sulfur in pyrite = more light sulfur in the sea!

High sea levels = light carbon, heavy sulfur in seawater

  • High sea levels = less space for plants = less light carbon uptake by plants = light carbon in the sea!
  • High sea levels = expanded habitat for sulfate-reducing bacteria = more light sulfur in pyrite = less light sulfur in the sea!

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