Back الوليوي (الكامبري) Arabic Камбрий етаж 5 Bulgarian Wuliuà Catalan Wuliuum German Wuliuense Spanish وولیوئن FA Wuliuen French Wuliuan ID ウリューアン Japanese 우류절 Korean
| Wuliuan | ||||||||||||||||||||||||||||||||||||||
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| Chronology | ||||||||||||||||||||||||||||||||||||||
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| Etymology | ||||||||||||||||||||||||||||||||||||||
| Name formality | Formal | |||||||||||||||||||||||||||||||||||||
| Name ratified | 2018[2] | |||||||||||||||||||||||||||||||||||||
| Former name(s) | Cambrian Stage 5 | |||||||||||||||||||||||||||||||||||||
| Usage information | ||||||||||||||||||||||||||||||||||||||
| Celestial body | Earth | |||||||||||||||||||||||||||||||||||||
| Regional usage | Global (ICS) | |||||||||||||||||||||||||||||||||||||
| Time scale(s) used | ICS Time Scale | |||||||||||||||||||||||||||||||||||||
| Definition | ||||||||||||||||||||||||||||||||||||||
| Chronological unit | Age | |||||||||||||||||||||||||||||||||||||
| Stratigraphic unit | Stage | |||||||||||||||||||||||||||||||||||||
| First proposed by | Zhao et al., 2018[3] | |||||||||||||||||||||||||||||||||||||
| Time span formality | Formal | |||||||||||||||||||||||||||||||||||||
| Lower boundary definition | FAD of Oryctocephalus indicus. | |||||||||||||||||||||||||||||||||||||
| Lower boundary GSSP | Wuliu-Zengjiayan, Guizhou, China 26°04′51″N 108°24′50″E / 26.0807°N 108.4138°E | |||||||||||||||||||||||||||||||||||||
| Lower GSSP ratified | 2018[2] | |||||||||||||||||||||||||||||||||||||
| Upper boundary definition | FAD of the Trilobite Ptychagnostus atavus | |||||||||||||||||||||||||||||||||||||
| Upper boundary GSSP | Drumian section, Wheeler Shale, Utah, U.S.A. 39°30′42″N 112°59′29″W / 39.5117°N 112.9915°W | |||||||||||||||||||||||||||||||||||||
| Upper GSSP ratified | 2006[4] | |||||||||||||||||||||||||||||||||||||
The Wuliuan stage is the fifth stage of the Cambrian, and the first stage of the Miaolingian Series of the Cambrian. It was formally defined by the International Commission on Stratigraphy in 2018.[5] Its base is defined by the first appearance of the trilobite species Oryctocephalus indicus; it ends with the beginning of the Drumian Stage, marked by the first appearance of the trilobite Ptychagnostus atavus around 504.5 million years ago.[6]
The 'golden spike' that formally defines the base of the period is driven into the Wuliu-Zengjiayan(乌溜-曾家崖)section of the Kaili formation, near Balang Village in the Miaoling Mountains, Guizhou, China.[7]
- ^ "Chart/Time Scale". stratigraphy.org. International Commission on Stratigraphy.
- ^ a b Yuanlong Zhao; Jinliang Yuan; Loren E. Babcock; Qingjun Guo; Jin Peng; Leiming Yin; Xinglian Yang; Shanchi Peng; Chunjiang Wang; Robert R. Gaines; Jorge Esteve; Tongsu Tai; Ruidong Yang; Yue Wang; Haijing Sun; Yuning Yang (June 2019). "Global Standard Stratotype-Section and Point (GSSP) for the conterminous base of the Miaolingian Series and Wuliuan Stage (Cambrian) at Balang, Jianhe, Guizhou, China" (PDF). Episodes. 42 (2): 165–184. doi:10.18814/epiiugs/2019/019013. S2CID 202181406. Retrieved 8 December 2020.
- ^ Yuanlong, Zhao; Jinliang, Yuan; Babcock, Loren; Qingjun, Guo; Jin, Peng; Leiming, Yin; Xinglian, Yang; Chunjiang, Wang; Gaines, Robert; Esteve, Jorge; Ruidong, Yang; Yuning, Yang; Haijing, Sun; Tongsu, Tai. "PROPOSED GLOBAL STANDARD STRATOTYPE-SECTION AND POINT FOR THE BASE OF THE MIAOLINGIAN SERIES AND WULIUAN STAGE （REPLACING PROVISIONAL CAMBRIAN SERIES 3 AND STAGE 5）". International Subcommission on Cretaceous Stratigraphy. International Subcommission on Cambrian Stratigraphy. Retrieved 13 December 2020.
- ^ Babcock, Loren; Robison, Richard; Rees, Margaret; Peng, Shanchi; Saltzman, Matthew (June 2007). "The Global boundary Stratotype Section and Point (GSSP) of the Drumian Stage (Cambrian) in the Drum Mountains, Utah, USA". Episodes. 30 (2): 85–89. doi:10.18814/epiiugs/2007/v30i2/003. Retrieved 13 December 2020.
- ^ "ChronostratChart2018-08" (PDF).
- ^ "GSSP Table - Paleozoic Era". Retrieved 15 November 2012.
- ^ "ISCS Annual Report 2017.pdf" (PDF).