Bashkirian

Bashkirian
Bashkirian
323.2 ± 0.4 – 315.2 ± 0.2 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 definitionFAD of the Conodont Declinognathodus nodiliferusLower boundary GSSPArrow Canyon, Nevada, USA
36°44′00″N 114°46′40″W / 36.7333°N 114.7778°WLower GSSP ratified1996^[2]Upper boundary definitionNot formally definedUpper boundary definition candidatesFAD of the Conodont Idiognathoides postsulcatus or Declinognathodus donetzianus

Upper boundary GSSP candidate section(s)

Southern

Ural mountains

Nashui, Luodian County, Guizhou, China

The Bashkirian is in the

age of the Pennsylvanian. The Bashkirian age lasted from 323.2 to 315.2 Ma,^[3] is preceded by the Serpukhovian and is followed by the Moscovian

.

The Bashkirian overlaps with the upper part of the Namurian and lower part of the Westphalian stages from regional European stratigraphy. It also overlaps with the North American Morrowan and Atokan stages and the Chinese Luosuan and lower Huashibanian stages.^[4]

Name and definition

The Bashkirian was named after Bashkiria, the then Russian name of the republic of

Sofia Semikhatova

in 1934.

The base of the Bashkirian is at the first appearance of

GSSP (type location for the base of a stage) for the Bashkirian is in the Battleship Wash Formation at Arrow Canyon, Nevada.^[7]

Subdivision

The Bashkirian contains six

index fossils

:

Neognathodus atokaensis Zone
Declinognathodus marginodosus Zone
Idiognathodus sinuosus
Zone
Neognathodus askynensis Zone
Idiognathoides sinuatus
Zone
Declinognathodus noduliferus Zone

References

^ "Chart/Time Scale". www.stratigraphy.org. International Commission on Stratigraphy.
doi:10.18814/epiiugs/1999/v22i4/003
.

Cambridge University
Press.
^ Heckel, P.H. & Clayton, G.; 2006: The Carboniferous system, use of the new official names for the subsystems, series and stages, Geologica Acta 4(3), pp 403–407.

^ 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. 28, pp 3–23 (in Russian).

^ Lane, H.R.; Brenckle, P.L.; Baesemann, J.F. & Richards, B.; 1999: The IUGS boundary in the middle of the Carboniferous: Arrow Canyon, Nevada, USA, Episodes 22(4), pp 272–283.

Literature

Menning, M.; Alekseev, A.S.; Chuvashov, B.I.; Davydov, V.I.; Devuyst, F.-X.; Forke, H.C.; Grunt, T.A.; Hance, L.; Heckel, P.H.; Izokh, N.G.; Jin, Y.-G.; Jones, P.J.; Kotlyar, G.V.; Kozur, H.W.; Nemyrovska, T.I.; Schneider, J.W.; Wang, X.-D.; Weddige, K.; Weyer, D. & Work, D.M.; 2006: Global time scale and regional stratigraphic reference scales of Central and West Europe, East Europe, Tethys, South China, and North America as used in the Devonian–Carboniferous–Permian Correlation Chart 2003 (DCP 2003), Palaeogeography, Palaeoclimatology, Palaeoecology 240(1-2): pp 318–372.

External links

Carboniferous timescale at the website of the Norwegian network of offshore records of geology and stratigraphy

Bashkirian, Geowhen Database

v
t
e
Geological history of Earth
Cenozoic Era
(present–66.0 Ma)
Quaternary (present–2.58 Ma)

Holocene (present–11.8 ka)

Pleistocene (11.8 ka–2.58 Ma)

Neogene (2.58–23.0 Ma)

Pliocene (2.59–5.33 Ma)

Miocene (5.33–23.0 Ma)

Paleogene (23.0–66.0 Ma)

Oligocene (23.0–33.9 Ma)

Eocene (33.9–56.0 Ma)

Paleocene (56.0–66.0 Ma)

Mesozoic Era
(66.0–252 Ma)
Cretaceous (66.0–145 Ma)

Late (66.0–100 Ma)

Early (100–145 Ma)

Jurassic (145–201 Ma)

Late (145–164 Ma)

Middle (164–174 Ma)

Early (174–201 Ma)

Triassic (201–252 Ma)

Late (201–237 Ma)

Middle (237–247 Ma)

Early (247–252 Ma)

Paleozoic Era
(252–539 Ma)
Permian (252–299 Ma)

Lopingian (252–260 Ma)

Guadalupian (260–272 Ma)

Cisuralian (272–299 Ma)

Carboniferous (299–359 Ma)

Pennsylvanian (299–323 Ma)

Mississippian (323–359 Ma)

Devonian (359–419 Ma)

Silurian (419–444 Ma)

Pridoli (419–423 Ma)

Ludlow (423–427 Ma)

Wenlock (427–433 Ma)

Llandovery (433–444 Ma)

Ordovician (444–485 Ma)

Cambrian (485–539 Ma)

Furongian (485–497 Ma)

Miaolingian (497–509 Ma)

Series 2 (509–521 Ma)

Terreneuvian (521–539 Ma)

Proterozoic Eon
(539 Ma–2.5 Ga)
Neoproterozoic (539 Ma–1 Ga)

Ediacaran (539–635 Ma)

Cryogenian (635–720 Ma)

Tonian (720 Ma–1 Ga)

Mesoproterozoic (1–1.6 Ga)

Stenian (1–1.2 Ga)

Ectasian (1.2–1.4 Ga)

Calymmian (1.4–1.6 Ga)

Paleoproterozoic (1.6–2.5 Ga)

Statherian (1.6–1.8 Ga)

Orosirian (1.8–2.05 Ga)

Rhyacian (2.05–2.3 Ga)

Siderian (2.3–2.5 Ga)

Archean Eon (2.5–4 Ga)

Neoarchean (2.5–2.8 Ga)

Mesoarchean (2.8–3.2 Ga)

Paleoarchean (3.2–3.6 Ga)

Eoarchean (3.6–4 Ga)

Hadean Eon (4–4.6 Ga)

ka = kiloannum (thousands years ago); Ma = megaannum (millions years ago); Ga = gigaannum (billions years ago).
See also: Geologic time scale • Geology portal • World portal

36°44′00″N 114°46′40″W / 36.7333°N 114.7778°W / 36.7333; -114.7778

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

[2] doi:10.18814/epiiugs/1999/v22i4/003
.

[3] Cambridge University
Press.

[4] Heckel, P.H. & Clayton, G.; 2006: The Carboniferous system, use of the new official names for the subsystems, series and stages, Geologica Acta 4(3), pp 403–407.

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

[6] Solovieva, M.N.; 1986: Zonal fusulinid scale of the Moscovian Stage based on a revision of the type sections of intrastage subdivisions, Vopr. Mikropaleontol. 28, pp 3–23 (in Russian).

[7] Lane, H.R.; Brenckle, P.L.; Baesemann, J.F. & Richards, B.; 1999: The IUGS boundary in the middle of the Carboniferous: Arrow Canyon, Nevada, USA, Episodes 22(4), pp 272–283.

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