Miaolingian

The Miaolingian is the third Series of the Cambrian period, and was formally named in 2018.[1] It lasted from about 509 to 497 million years ago and is divided into 3 stages: the Wuliuan, the Drumian, and the Guzhangian. The Miaolingian is preceded by the unnamed Cambrian Series 2 and succeeded by the Furongian series.[2]

Miaolingian Epoch 509–497 million years ago PreꞒ Ꞓ O S D C P T J K Pg N
Ages in the Miaolingian epoch/series -508 — – -506 — – -504 — – -502 — – -500 — – -498 — – P a l e o z o i c C a m b r i a n *Series 2* M i a o l i n g i a n Furongian Wuliuan Drumian Guzhangian ← Orsten Fauna ← Burgess Shale ← Kaili biota Ages of the Miaolingian epoch/series. Axis scale: millions of years ago.

Definition

The lower boundary of the Miaolingian has the same definition as that of the Wuliuan. This boundary was formally defined by the ICS in 2018.

A number of proposals for fossils and type sections were made. The most promising fossil markers were seen to be the respective first appearances of either trilobite species Ovatoryctocara granulata or Oryctocephalus indicus.[3] Either species should have an age close to 509 million years ago.[2] The Miaolingian-Furongian boundary has the same definition as the Paibian stage. It is defined as the first appearance of Glyptagnostus reticulatus around 497 million years ago.[2]

Subdivision

The Miaolingian is subdivided into the following stages:[2]

Epoch	Stage	Age (mya)
Furongian
	Stage 10	489.5
	Jiangshanian	494
	Paibian	497
Miaolingian
	Guzhangian	500.5
	Drumian	504.5
	Wuliuan	509
Series 2
	Stage 4	514
	Stage 3	521

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References

http://www.stratigraphy.org/icschart/ChronostratChart2018-08.pdf
"GSSP Table - Paleozoic Era". Retrieved 15 November 2012.
Gozalo, Rodolfo; Álvarez, María Eugenia Dies; Vintaned, José Antonio Gámez; Zhuravlev, Andrey Yu.; Bauluz, Blanca; Subías, Ignacio; Chirivella Martorell, Juan B.; Mayoral, Eduardo; Gursky, Hans-Jürgen; Andrés, José Antonio; Liñán, Eladio (1 December 2011). "Proposal of a reference section and point for the Cambrian Series 2-3 boundary in the Mediterranean subprovince in Murero (NE Spain) and its intercontinental correlation". Geological Journal. 48: 142–155. doi:10.1002/gj.1330.

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[1] ttp://www.stratigraphy.org/icschart/ChronostratChart2018-08.pdf

[GSSP_Table_-_Paleozoic_Era-2] "GSSP Table - Paleozoic Era". Retrieved 15 November 2012.

[Gozalo_2011-3] Gozalo, Rodolfo; Álvarez, María Eugenia Dies; Vintaned, José Antonio Gámez; Zhuravlev, Andrey Yu.; Bauluz, Blanca; Subías, Ignacio; Chirivella Martorell, Juan B.; Mayoral, Eduardo; Gursky, Hans-Jürgen; Andrés, José Antonio; Liñán, Eladio (1 December 2011). "Proposal of a reference section and point for the Cambrian Series 2-3 boundary in the Mediterranean subprovince in Murero (NE Spain) and its intercontinental correlation". Geological Journal. 48: 142–155. doi:10.1002/gj.1330.