End-Botomian mass extinction

The Botomian stage of the Early Cambrian epoch lasted from ca 524 to ca 517 million years ago. At the end of the Botomian stage there was a mass extinction that wiped out a high percentage of the organisms for which fossils were found. Organisms which produced small shelly fossils were almost exterminated.

This page was last edited on 20 September 2017, at 20:19.
Reference: https://en.wikipedia.org/wiki/End-Botomian_extinction_event under CC BY-SA license.

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