Devonian: The Little Known Era When Armored Prehistoric Sharks Dominated the Seas DOCUMENTARY

The Devonian period began around 419 million years ago and spanned 60 million years. It ended around 359 million years ago. This long Devonian period is subdivided into three subperiods: Lower Devonian, Middle Devonian and Upper Devonian. To be even more precise, these subsections have themselves been subdivided into smaller periods. Thus, in the Lower Devonian, we find the Lochkovian, then the Praguian, and the Emsian, in the Middle Devonian, the Eifelian the Givétien, finally in the Upper Devonian we find the Frasnian and the Famennian. As a reminder, videos are published on SUNDAYS at 6:00 pm. The Devonian: We re going to start our journey into the Devonian with a little tour of our planet from the sky. The map in front of you shows the importance of the ocean on our planet. It covers a large part of the planet. This was already the case in Silurian times, when the Panthalassa ocean covered a very large par