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Archean Eon

Taylor Cobb

Created on September 30, 2024

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Transcript

The average surface temperature for this eon was between 0 and 40 degrees Celcius.

During this time photsynthesizing bacterias began to form. These cyanobacterias flooeded the atmosphere with waste (oxygen) . This effected the climate of the Earth and caused the Huronian glaciation. This catastrophe is considered one of the biggest exctinction events.

Major Event

Photosynthesizing bacteria began to form and affect the atmosphere.

What Was It Like?

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The atmosphere experienced a flood of oxygen during this eon due to photosynthesizing bacterias.

Archean Eon

3,850 - 2,500 Ma

The oceans were full of iron and appeared green due to rust.

Considered first appearance of life on Earth. The oldest fossils found date back to this eon

The oxygen being released was poisoning anaerobic microbes.

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Resources Catling, David C, and Kevin J Zahnle. “The Archean Atmosphere.” Science advances 6.9 (2020): eaax1420–eaax1420. Web. Schopf, J. William et al. “Evidence of Archean Life: Stromatolites and Microfossils.” Precambrian research 158.3 (2007): 141–155. Web.

The amount of oxygen emitted into the atmosphere prior was a very small amount.

Fun Facts!

Fun Facts!

The oldest fossils known that were found during this eon were found in Western Australia 3.5 billion years ago.

Only 2%-3% of the Earth was dry land.