Ordovician–Silurian Extinction (19 h 2 m, 15 jun 450000000 año aC – 1 agos 439000000 año aC)
Descripción:
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.Añadido al timeline:
fecha:
19 h 2 m, 15 jun 450000000 año aC
1 agos 439000000 año aC
~ 5883516 years