How do red bands of iron oxide provide evidence of oxygen accumulating in Earth's early atmosphere? Red bands

Question

How do red bands of iron oxide provide evidence of oxygen accumulating in Earth's early atmosphere?

Red bands form when iron reacted with oxygen.

Red bands form when ammonia experienced photolysis.

Red bands form when plants produced glucose.

Red bands form when comets deposited water.

GPT-5 mini · Answer

Red bands form when iron reacted with oxygen.

Explanation: Banded iron formations are layers of iron oxides (red) that precipitated when dissolved iron in seawater reacted with free oxygen produced by early photosynthetic organisms, so their presence indicates oxygen was accumulating.

How do red bands of iron oxide provide evidence of oxygen accumulating in Earth's early atmosphere?

Red bands form when iron reacted with oxygen.

Red bands form when ammonia experienced photolysis.

Red bands form when plants produced glucose.

Red bands form when comets deposited water.

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How do red bands of iron oxide provide evidence of oxygen accumulating in Earth's early atmosphere? Red bands form when iron reacted with oxygen. Red bands form when ammonia experienced photolysis. Red bands form when plants produced glucose. Red bands form when comets deposited water.

All Answers 1

Submit Your Answer

How do red bands of iron oxide provide evidence of oxygen accumulating in Earth's early atmosphere?

Red bands form when iron reacted with oxygen.

Red bands form when ammonia experienced photolysis.

Red bands form when plants produced glucose.

Red bands form when comets deposited water.