Kungurian

Kungurian
Kungurian
Chronology
←	Permian-Triassic mass extinction event
←	end-Capitanian extinction event
←	Olson's Extinction
	Subdivision of the Permian according to the ICS, as of 2022.[1]; Vertical axis scale: millions of years ago.;
Etymology
Name formality	Formal
Usage information
Celestial body	Earth
Regional usage	Global (ICS)
Time scale(s) used	ICS Time Scale
Definition
Chronological unit	Age
Stratigraphic unit	Stage
Time span formality	Formal
Lower boundary definition	Not formally defined
Lower boundary definition candidates	Near FAD of the Conodont Neostreptognathodus pnevi
Lower boundary GSSP candidate section(s)	Mechetlino, Southern Ural Mountains, Russia
Upper boundary definition	FAD of the Conodont Jinogondolella nanginkensis
Upper boundary GSSP	Stratotype Canyon, Guadalupe Mountains, Texas, U.S.A.; 31.8767°N 104.8768°W
Upper GSSP ratified	2001[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:

zone of Neostreptognathodus sulcoplicatus
zone of Neostreptognathodus prayi
zone of Neostreptognathodus pnevi

References

"Chart/Time Scale". www.stratigraphy.org. International Commission on Stratigraphy.
"GSSP for Roadian Stage". International Commission on Stratigraphy. Retrieved 13 December 2020.
Gradstein, F.M.; Ogg, J.G. & Smith, A.G.; 2004: A Geologic Time Scale 2004, Cambridge University Press
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

GeoWhen Database - Kungurian
Upper Paleozoic stratigraphic chart at the website of the subcommission for stratigraphic information of the ICS

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[icstimescale-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.