The Givetian is one of two
faunal stage
In chronostratigraphy, a stage is a succession of rock strata laid down in a single age on the geologic timescale, which usually represents millions of years of deposition. A given stage of rock and the corresponding age of time will by conven ...
s in the
Middle Devonian
In the geological timescale, the Middle Devonian epoch (from 393.3 ± 1.2 million years ago to 382.7 ± 1.6 million years ago) occurred during the Devonian period, after the end of the Emsian age.
The Middle Devonian epoch is subdivided into two ...
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
A Global Boundary Stratotype Section and Point (GSSP), sometimes referred to as a golden spike, is an internationally agreed upon reference point on a stratigraphic section which defines the lower boundary of a stage on the geologic time scale. ...
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.
References
Further reading
*
{{Geological history, p, p
Middle Devonian
Devonian geochronology
.
Devonian North America