Kungurian
283.5 ± 0.6 – 273.01 ± 0.14 Ma
Chronology
Etymology
Name formalityFormal
Usage information
Celestial bodyEarth
Regional usageGlobal (ICS)
Time scale(s) usedICS Time Scale
Definition
Chronological unitAge
Stratigraphic unitStage
Time span formalityFormal
Lower boundary definitionNot formally defined
Lower boundary definition candidatesNear FAD of the Conodont Neostreptognathodus pnevi
Lower boundary GSSP candidate section(s)Mechetlino, Southern Ural Mountains, Russia
Upper boundary definitionFAD of the Conodont Jinogondolella nanginkensis
Upper boundary GSSPStratotype Canyon, Guadalupe Mountains, Texas, U.S.A.
31°52′36″N 104°52′36″W / 31.8767°N 104.8768°W / 31.8767; -104.8768
Upper GSSP ratified2001[2]

In the geologic timescale, the Kungurian is an age or stage of the Permian. It is the latest or upper of four subdivisions of the Cisuralian Epoch or Series. The Kungurian lasted between 283.5 and 273.01 million years ago (Ma). It was preceded by the Artinskian and followed by the Roadian.[3]

Stratigraphy

The Kungurian is named after the Russian city of Kungur in Perm Krai. The stage was introduced into scientific literature by Russian geologist Alexandr Antonovich Stukenberg (Alexander Stuckenberg) in 1890.[4]

The base of the Kungurian Stage is defined as the place in the stratigraphic record where fossils of conodont species Neostreptognathodus pnevi and Neostreptognathodus exculptus first appear. As of 2009, there was no agreement yet on a global reference profile (a GSSP) for the base of the Kungurian. The top of the Kungurian (the base of the Roadian and the Guadalupian series) is defined as the place in the stratigraphic record where fossils of conodont species Jinogondolella nanginkensis first appear.

The Kungurian contains three conodont biozones:

References

  1. ^ "Chart/Time Scale". www.stratigraphy.org. International Commission on Stratigraphy.
  2. ^ "GSSP for Roadian Stage". International Commission on Stratigraphy. Retrieved 13 December 2020.
  3. ^ Gradstein, F.M.; Ogg, J.G. & Smith, A.G.; 2004: A Geologic Time Scale 2004, Cambridge University Press
  4. ^ Chuvashov, B.I.; Chernykh, V.V.; Leven, E.Y.; Davydov, V.I.; Bowring, S.A.; Ramezani, J.; Glenister, B.F.; Henderson, C.M.; Schiappa, T.A.; Northrup, C.J.; Snyder, W.S.; Spinosa, C. & Wardlaw, B.R.; 2002: Progress report on the base of the Artinskian and base of the Kungurian by the Cisuralian Working Group, Permophiles 41: pp 13–16.

External links

Permian Period
Geological history of Earth
Categories