“Kungurian”的意思、由来-开放百科全书

词条

Kungurian

释义

Stratigraphy
Palaeontology
Amphibians Synapsids
References
External links

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 {{Period start|Kungurian}} and {{Period start|Roadian}} million years ago (Ma). It was preceded by the Artinskian and followed by the Roadian.^[1] It corresponds roughly to the Leonardian stage, covering the span from 280 to 270.6 ± 0.7 Ma in the North American system.^[2]

Stratigraphy

The Kungurian is named after the Russian city of Kungur in the vicinity of Perm. The stage was introduced into scientific literature by Russian geologist Alexandr Antonovich Stukenberg (Alexander Stuckenberg) in 1890.^[3]

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

Palaeontology

Amphibians

Cacops

Diadectes

Discosauriscus

Seymouria

Trimerorhachis

Amphibians of the Kungurian
Taxa	Presence	Location	Description	Images
Texas, Oklahoma, China and Russia
North America
Boskovice Furrow, Czech Republic
Tambach, Germany, Europe and Seymour, Baylor County, Texas among others in North America
Abo Formation, New Mexico and Seymour, Baylor County, Texas

Synapsids

Casea

Ctenospondylus

Sakmarian-Kungurian

Greene Formation, Ohio; Belle Plains Formation, Texas; Cutler Formation, Utah, all in the USA

Ophiacodon

Secodontosaurus

Synapsids of the Kungarian
Taxa	Presence	Location	Description	Images
Texas, USA and Aveyron, France

Kasimovian-Kungurian Kenilworth, Kenilworth Sandstone Formation, Warwickshire Group, Warwickshire, England; Autun, France, Cutler Formation, Arizona, Colorado, New Mexico and Utah; Fort riley, Chase Group, Kansas, Greene Formation, Dunkard Group, Ohio; Wellington Formation, Oklahoma; Clyde Formation, Texas and Oklahoma; Admiral Formation; Belle-Plains Formation; Wichita Group, all three in Texas,
Wichita Group and Clear Fork Group, both in Texas, USA

References

1. ^{{aut|Gradstein, F.M.; Ogg, J.G. & Smith, A.G.}}; 2004: A Geologic Time Scale 2004, Cambridge University Press
2. ^{{cite web |url=http://www.stratigraphy.org/bak/geowhen/stages/Leonardian.html |title=Leonardian North American Stage |author=Rohde, Robert A. |date= |work=GeoWhen Database |publisher= |accessdate=December 10, 2012}}
3. ^{{aut|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

3 : Permian geochronology|Cisuralian|Permian Asia

随便看

开放百科全书收录14589846条英语、德语、日语等多语种百科知识，基本涵盖了大多数领域的百科知识，是一部内容自由、开放的电子版国际百科全书。