mar 28, 444000000 BC - Graptolite

Description:

-sea creatures
-ice age lowered sea level led to the extinction

Source:
https://userpages.umbc.edu/~squire/extinctions.html
http://skywalker.cochise.edu/wellerr/fossil/graptolite/6graptolite1945.JPG

Added to timeline:

26 Oct 2018

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