Earth:Miaolingian
| Miaolingian | |
|---|---|
| ~509 – ~497 Ma | |
| Chronology | |
Cambrian graphical timeline -540 — – -535 — – -530 — – -525 — – -520 — – -515 — – -510 — – -505 — – -500 — – -495 — – -490 — – -485 — – Major Glacial period | |
| Etymology | |
| Name formality | Formal |
| Former name(s) | Cambrian Series 3 |
| Usage information | |
| Celestial body | Earth |
| Regional usage | Global (ICS) |
| Time scale(s) used | ICS Time Scale |
| Definition | |
| Chronological unit | Epoch |
| Stratigraphic unit | Series |
| Time span formality | Formal |
| Lower boundary definition | FAD of the Trilobite Oryctocephalus indicus. |
| Lower boundary GSSP | Wuliu-Zengjiayan, Guizhou, China [ ⚑ ] 26°04′51″N 108°24′50″E / 26.0807°N 108.4138°E |
| GSSP ratified | 2018[2] |
| Upper boundary definition | FAD of the Trilobite Glyptagnostus reticulatus |
| Upper boundary GSSP | Paibi section, Paibi, Hunan, China [ ⚑ ] 28°23′22″N 109°31′33″E / 28.3895°N 109.5257°E |
| GSSP ratified | 2003[3] |
The Miaolingian is the third Series of the Cambrian Period, and was formally named in 2018.[4] 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.[5]
Definition
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,[6] which both have an age close to 509 million years ago.[5] 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 .[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.[5]
Subdivision
The Miaolingian is subdivided into the following stages:[5]
| Epoch | Stage | Age lower boundary (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 |
References
- ↑ "Chart/Time Scale". International Commission on Stratigraphy. http://www.stratigraphy.org/index.php/ics-chart-timescale.
- ↑ 2.0 2.1 Cite error: Invalid
<ref>tag; no text was provided for refs namedZhao2019 - ↑ 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.
- ↑ "Archived copy". http://www.stratigraphy.org/icschart/ChronostratChart2018-08.pdf.
- ↑ 5.0 5.1 5.2 5.3 "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.
 |  |
