Moscovian (Carboniferous)

Moscovian
Moscovian
315.2 ± 0.2 – 307.0 ± 0.1 Ma PreꞒ Ꞓ O S D C P T J K Pg N
Chronology
−360 — – −355 — – −350 — – −345 — – −340 — – −335 — – −330 — – −325 — – −320 — – −315 — – −310 — – −305 — – −300 — –	Romer's Gap
	Subdivision of the Carboniferous according to the ICS, as of 2021.; Vertical axis scale: millions of years ago

EtymologyName formalityFormalUsage informationCelestial body

AgeStratigraphic unitStageTime span formalityFormalLower boundary definitionNot formally definedLower boundary definition candidatesFAD of the Conodont Idiognathoides postsulcatus or Declinognathodus donetzianus

Lower boundary GSSP candidate section(s)

Southern

Ural mountains

Nashui, Luodian County, Guizhou, China

Upper boundary definitionNot formally definedUpper boundary definition candidatesFAD of the Fusulinid Protriticites or 1 million years older Montiparus montiparusUpper boundary GSSP candidate section(s)

Southern Ural mountains
Southwest USA
Nashui, Luodian County, Guizhou, China

The Moscovian is in the

Ma,^[2] is preceded by the Bashkirian and is followed by the Kasimovian. The Moscovian overlaps with the European regional Westphalian

stage and the North American Atokan and Desmoinesian stages.

Name and definition

The Moscovian Stage was introduced by

brachiopods in the Moscow Basin of European Russia. Nikitin named the stage after Moscow, then a major city and now the capital of Russia

.

The base of the Moscovian is close to the first appearances of the

Diplognathodus ellesmerensis, but since the species is rare and its evolution relatively unknown, it has not been accepted yet.^[5]

The top of the Moscovian (base of the Kasimovian) is at the base of the fusulinid

ammonite genus

Parashumardites.

Subdivisions

In European Russia and Eastern Europe, where the stage was first recognized, the Moscovian is subdivided into four regional substages: Vereiskian, Kashirskian, Podolskian, and Myachkovskian, named after towns near Moscow (Vereya, Kashira, Podolsk, and Myachkovo).

The Moscovian can biostratigraphically be divided into five conodont biozones:

Neognathodus roundyi and Streptognathodus cancellosus Zone
Neognathodus medexultimus and Streptognathodus concinnus Zone
Streptognathodus dissectus Zone
Neognathodus uralicus Zone
Declinognathodus donetzianus Zone

References

^ "Chart/Time Scale". www.stratigraphy.org. International Commission on Stratigraphy.
^ Gradstein, F.M.; Ogg, J.G. & Smith, A.G.; 2004: A Geologic Time Scale 2004, Cambridge University Press
^ *Nemyrovska, T.I.; 1999: Bashkirian conodonts of the Donets Basin, Ukraine. Scr. Geol. 119, pp 1–115 (in Russian).
^ *Solovieva, M.N.; 1986: Zonal fusulinid scale of the Moscovian Stage based on a revision of the type sections of intrastage subdivisions, Vopr. Mikropaleontol
^ [1] Archived 2011-07-07 at the Wayback Machine a report by the taskforce to establish a Bashkirian-Moscovian boundary (Groves et al. (2008))

External links

Carboniferous timescale at the website of the Norwegian network of offshore records of geology and stratigraphy
Moscovian, Geowhen Database

[1] "Chart/Time Scale". www.stratigraphy.org. International Commission on Stratigraphy.

[2] Gradstein, F.M.; Ogg, J.G. & Smith, A.G.; 2004: A Geologic Time Scale 2004, Cambridge University Press

[3] *Nemyrovska, T.I.; 1999: Bashkirian conodonts of the Donets Basin, Ukraine. Scr. Geol. 119, pp 1–115 (in Russian).

[4] *Solovieva, M.N.; 1986: Zonal fusulinid scale of the Moscovian Stage based on a revision of the type sections of intrastage subdivisions, Vopr. Mikropaleontol

[5] [1] Archived 2011-07-07 at the Wayback Machine a report by the taskforce to establish a Bashkirian-Moscovian boundary (Groves et al. (2008))

[1]

[2]

[5]