Cambrian Series 2

Cambrian Series 2
Name formalityInformal
Usage information
Celestial bodyEarth
Regional usageGlobal (ICS)
Time scale(s) usedICS Time Scale
Chronological unitEpoch
Stratigraphic unitSeries
Time span formalityFormal
Lower boundary definitionNot formally defined
Lower boundary definition candidatesFAD of Trilobites
Lower boundary GSSP candidate section(s)None
Upper boundary definitionFAD of Oryctocephalus indicus.
Upper boundary GSSPWuliu-Zengjiayan, Guizhou, China
26°04′51″N 108°24′50″E / 26.0807°N 108.4138°E / 26.0807; 108.4138
Upper GSSP ratified2018[2]

Cambrian Series 2 is the unnamed 2nd series of the Cambrian. It lies above the Terreneuvian series and below the Miaolingian. Series 2 has not been formally defined by the International Commission on Stratigraphy, lacking a precise lower boundary and subdivision into stages. The proposed lower boundary is the first appearance of trilobites which is estimated to be around 521 million years ago.[3][4]

  1. ^ "Chart/Time Scale". International Commission on Stratigraphy.
  2. ^ Zhao; et al. (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: 165–184. Retrieved 8 December 2020.
  3. ^ "GSSP Table - Paleozoic Era". Retrieved 18 November 2012.
  4. ^ Wu, Tong; Yang, Ruidong; Gao, Junbo; Li, Jun (1 January 2021). "Age of the lower Cambrian Vanadium deposit, East Guizhou, South China: Evidences from age of tuff and carbon isotope analysis along the Bagong section". Open Geosciences. 13 (1): 999–1012. doi:10.1515/geo-2020-0287. ISSN 2391-5447.

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