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Elijah Allison
Created on February 20, 2023
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It is the final period of the Mesoproterozoic Era. The world still lacked an ozone layer and oxygen only made up between 2-4% of the atmosphere. The only organisms consisted of types of bacteria.
Stenian Period interactive poster.
Elijah Allison
Created on February 20, 2023
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Transcript
Stenian Period
1200- 1000 Mya
It is the final period of the Mesoproterozoic Era. The world still lacked an ozone layer and oxygen only made up between 2-4% of the atmosphere. The only organisms consisted of types of bacteria.