What Factor(s)led to the Enormous Scale of Banded Iron Deposition

question 53

Multiple Choice

What factor(s) led to the enormous scale of banded iron deposition during the Proterozoic?

• A) abundance of dissolved iron in seawater
• B) increase in photosynthesizing bacteria
• C) chemical affinity of iron to combine with available oxygen
• D) all of these
• E) none of these

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