PALEOZOIC ERA (1 ene 542000000 año aC – 30 dic 251000000 año aC)

Descripción:

GEOLOGICAL:
-Start of Andean-Saharan ice age.
- Atmospheric oxygen levels reach over 30%
BIOLOGICAL:
-Animals with shells appear
-Ferns and seed-bearing plants appear
GEORGIA:
-the sea flooded over the eastern edge of North America, a thick sequence of shallow marine sediments was deposited

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