Natural.World

• Palaeozoic era
  • - Silurian period
  • - Devonian period
  • - Carboniferous period
  • - Permian period
• Mesozoic era
  • - Triassic period
  • - Jurassic period
  • - Cretaceous period
• Cenozoic era
  • - Tertiary period
  • - Pleistocene epoch
  • - Holocene epoch

Silurian Period

The Silurian Period occurred from 443 million to 416 million years ago. It was the third period in the Palaeozoic Era. It followed the Ordovician Period and preceded the Devonian Period. During this time, continental landmasses were low and sea levels were rising. This meant rich shallow sea ecosystems with new ecological niches. Silurian fossils show evidence of extensive reef building and the first signs that life beginning to colonize the new estuary, fresh water and terrestrial ecosystems.

Source: Live Science