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  • 17-12-2021
  • Geography
contestada

what did rusted layers of iron in sedimentary rock tell geologists about the chemical composition of the oceans long ago?

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Аноним Аноним
  • 17-12-2021

Answer:

They knew there was dissolved iron in the early oceans -- a strong indication that Earth's free oxygen concentrations were exceedingly low.

Explanation:

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