Ordovician–Silurian Extinction (19h 2min, jun 15, 450000000 y BC – aug 1, 439000000 BC)
Description:
Scientists believe two major events resulted in this extinction: glaciation and falling sea levels.86% of life on Earth was wiped out.Trilobites, brachiopods, and graptolites died off in large numbers but interestingly, this did not lead to any major species changes during the next era.Added to timeline:
Date:
19h 2min, jun 15, 450000000 y BC
aug 1, 439000000 BC
~ 5883516 years