The Givetian is one of two
faunal stages in the
Middle Devonian Period. It lasted from 387.7 million years ago to 382.7 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.[7] The lower GSSP is located at
Jebel Mech Irdane,
Tafilalt, Morocco.
Name and definition
The Givetian Stage was proposed in 1879 by French geologist
Jules Gosselet and was accepted for the higher stage of the Middle Devonian by the Subcommission on Devonian Stratigraphy in 1981.[8]
^Kaufmann, B.; Trapp, E.; Mezger, K. (2004). "The numerical age of the Upper Frasnian (Upper Devonian) Kellwasser horizons: A new U-Pb zircon date from Steinbruch Schmidt(Kellerwald, Germany)". The Journal of Geology. 112 (4): 495–501.
Bibcode:
2004JG....112..495K.
doi:
10.1086/421077.
^Algeo, T. J. (1998). "Terrestrial-marine teleconnections in the Devonian: links between the evolution of land plants, weathering processes, and marine anoxic events". Philosophical Transactions of the Royal Society B: Biological Sciences. 353 (1365): 113–130.
doi:
10.1098/rstb.1998.0195.
^"Chart/Time Scale". www.stratigraphy.org. International Commission on Stratigraphy.