|~509 – ~497 Ma|
|Former name(s)||Cambrian Series 3|
|Regional usage||Global (ICS)|
|Time scale(s) used||ICS Time Scale|
|Time span formality||Formal|
|Lower boundary definition||FAD of the Trilobite Oryctocephalus indicus.|
|Lower boundary GSSP||Wuliu-Zengjiayan, Guizhou, China|
|Upper boundary definition||FAD of the Trilobite Glyptagnostus reticulatus|
|Upper boundary GSSP||Paibi section, Paibi, Hunan, China|
The Miaolingian is the third Series of the Cambrian period, and was formally named in 2018. It lasted from about 509 to 497 million years ago and is divided in ascending order into 3 stages: the Wuliuan, Drumian, and Guzhangian. The Miaolingian is preceded by the unnamed Cambrian Series 2 and succeeded by the Furongian series.
A number of proposals for fossils and type sections were made before it was formally ratified in 2018. The most promising fossil markers were seen to be the respective first appearances of either trilobite species Ovatoryctocara granulata or Oryctocephalus indicus, which both have an age close to 509 million years ago. After some deliberation, the FAD of Oryctocephalus indicus was chosen to be the lower boundary marker, and the GSSP was placed in Wuliu-Zengjiayan, Guizhou, China .
The Miaolingian is subdivided into the following stages:
- "Chart/Time Scale". International Commission on Stratigraphy. http://www.stratigraphy.org/index.php/ics-chart-timescale.
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- Peng, S. C.; Babcock, L. E.; Robison, R. A.; Lin, H. L.; Rees, M. N.; Saltzman, M. R. (2004). "Global Standard Stratotype-Section and Point (GSSP) of the Furongian Series and Paibian Stage (Cambrian)". Lethaia 37 (4): 365–379. doi:10.1080/00241160410002081. http://www.palaeontology.geo.uu.se/ISCS/ISCS_GSSPs.html. Retrieved 8 December 2020.
- "GSSP Table - Paleozoic Era". https://engineering.purdue.edu/Stratigraphy/gssp/index.php?parentid=77.
- Gozalo, Rodolfo; Álvarez, María Eugenia Dies; Vintaned, José Antonio Gámez; Zhuravlev, Andrey Yu.; Bauluz, Blanca; Subías, Ignacio; Chirivella Martorell, Juan B.; Mayoral, Eduardo et al. (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 (2–3): 142–155. doi:10.1002/gj.1330.
Original source: https://en.wikipedia.org/wiki/ Miaolingian. Read more