Middle Devonian

The Givetian is one of two faunal stages in the Middle Devonian Period. It lasted from million years ago to million years ago. It was preceded by the Eifelian Stage and followed by the Frasnian Stage. It is named after the town of Givet in France. The oldest forests occurred during the late Givetian. The lower GSSP is located at Jebel Mech Irdane, Tafilalt, Morocco.

The Eifelian is the first of two faunal stages in the Middle Devonian Epoch. It lasted from 393.47 ± 0.99 million years ago to 387.95 ± 1.04 million years ago. It was preceded by the Emsian Stage and followed by the Givetian Stage.

second series and epoch of the Devonian system and period