jul 30, 443000000 BC - Ordovician-Silurian mass extinction
Description:
As the third largest extinction in earths history, covering two peak dying times, 85% of sea life was drastically reduced in number. An ice age due to climate change and fall in sea level has been blamed on the extinction of the trilobites, brachiopods and graptolites of this time, messing with the chemistry of the oceans.Added to timeline:
Date:
jul 30, 443000000 BC
Now
~ 5883516 years ago