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Ordovician (488 mya - 444 mya) (sep 19, 488000000 BC – may 20, 444000000 BC)
Description:
Invertebrates dominated the oceans (mostly molluscs and arthropods)
Added to timeline:
13 Dec 2018
0
0
345
Earth Geologic History
Geologic History of the Earth
Date:
sep 19, 488000000 BC
may 20, 444000000 BC
~ 5883516 years
Images: