Which statement related to the oxygenation of Earth's atmosphere is false?

Question

Accepted Answer

the first oxygenation event occurred around 700 Ma

Answer

sedimentary rocks that formed before 2.4 Ma are not red because there was a lack of oxygen for oxidation to occur.

Answer

cyanobacteria photosynthesis was the main process that oxygenated Earth's early atmosphere.

Answer

the great oxygenation event was the first increase in oxygen but was not as large as the second oxygenation event.

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