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jan 24, 444000000 BC - End Ordovician
Description:
https://userpages.umbc.edu/~squire/extinctions.html
444 million years ago, 86% of species lost
— Graptolite 2-3 cm length
Added to timeline:
29 Oct 2018
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329
Digital Geologic Time Scale
Date:
jan 24, 444000000 BC
Now
~ 5883516 years ago