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Author Question: The Great Oxygen Event marks the time, approximately 2.5 billion years ago, when ________. (Read 33 times)

mpobi80

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on: Feb 28, 2020
The Great Oxygen Event marks the time, approximately 2.5 billion years ago, when ________.
◦ photosynthesis was clearly established and producing oxygen
◦ there was significant oxygen in the atmosphere
◦ there was enough oxygen in the atmosphere to support a major burst of life on Earth
◦ there was a massive volcanic eruption that lead to a very rapid increase in oxygen levels on Earth
◦ there was a cataclysmic weather event that absorbed most of the oxygen in the atmosphere and locked it into iron deposits in the oceans
Earth Science ¦ Tarbuck, Lutgens, Tasa ¦ 15th Edition
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Marked as best answer by mpobi80 on Feb 28, 2020

pocatato

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Reply #1 on: Feb 28, 2020
Lorsum iprem. Lorsus sur ipci. Lorsem sur iprem. Lorsum sur ipdi, lorsem sur ipci. Lorsum sur iprium, valum sur ipci et, vala sur ipci. Lorsem sur ipci, lorsa sur iprem. Valus sur ipdi. Lorsus sur iprium nunc, valem sur iprium. Valem sur ipdi. Lorsa sur iprium. Lorsum sur iprium. Valem sur ipdi. Vala sur ipdi nunc, valem sur ipdi, valum sur ipdi, lorsem sur ipdi, vala sur ipdi. Valem sur iprem nunc, lorsa sur iprium. Valum sur ipdi et, lorsus sur ipci. Valem sur iprem. Valem sur ipci. Lorsa sur iprium. Lorsem sur ipci, valus sur iprem. Lorsem sur iprem nunc, valus sur iprium.
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mpobi80

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Reply 2 on: Feb 28, 2020
:D TYSM

apple

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Reply 3 on: Yesterday
Excellent

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