1 Most BIFs are banded which indicates episodic precipitation of hematite Make a conjecture about why this pattern exists Hint

Question

1 Most BIFs are banded which indicates episodic precipitation of hematite Make a conjecture about why this pattern exists Hint Remember that the precipitation of hematite depended on oxygen supply What might cause the oxygen supply in the Late Archean Early Proterozoic oceans to fluctuate on a regular basis Where does the oxygen come from What climatic variables might effect this source

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