Earth:Yanjiahe Formation
From HandWiki
| Yanjiahe Formation Stratigraphic range: Ediacaran - Fortunian ~542–529 Ma | |
|---|---|
| Type | Formation |
| Overlies | Dengying Formation |
| Lithology | |
| Primary | Shale, limestone, dolomite |
| Other | Chert, phosphorite |
| Location | |
| Coordinates | [ ⚑ ] : 30°48′N 111°18′E / 30.8°N 111.3°E |
| Paleocoordinates | [ ⚑ ] 27°36′N 160°12′E / 27.6°N 160.2°E |
| Region | Hubei |
| Country |  China |
| Extent | Yangtze Gorges |
  Yanjiahe Formation (China)  Yanjiahe Formation (Hubei) | |
The Yanjiahe Formation is an Ediacaran to Cambrian fossiliferous geologic formation found in South China.[1][2]
Fossil content
Among others, the following fossils were found in the formation:[2]
- Aldanella attleborensis[3]
- Anabarites trisulcatus[3]
- Archaeophycus yunnanensis[4]
- Comasphaeridium annulare[4]
- Conotheca subcurvata[3]
- Emeiconus antiqua[3]
- Heliosphaeridium ampliatum[4]
- Megathrix longus[4]
- Micrhystridium regulare[3]
- Protoconites minor[3]
- Purella antiqua[3]
- Yanjiahella biscarpa[5]
- Lapworthella sp.[3]
- Protohertzina sp.[3]
- Vendotaenia sp.[3]
- Yuknessia sp.[3]
- ?Konglingiphyton sp.[3]
References
Bibliography
- Topper, Timothy P.; Junfeng Guo; Sébastien Clausen; Christian B. Skovsted, and Zhifei Zhang. 2019. A stem group echinoderm from the basal Cambrian of China and the origins of Ambulacraria. Nature Communications 10. 1366. doi:10.1038/s41467-019-09059-3 ISSN 2041-1723 PMC 6433856 PMID 30911013
- Dong, Lin; Shuhai Xiao; Bing Shen; Chuanming Zhou; Li Guoxiang, and Jinxian Yao. 2009. Basal Cambrian Microfossils from the Yangtze Gorges Area (South China) and the Aksu Area (Tarim Block, Northwestern China). Chemical Geology 83. 30–34. Accessed 2014-08-15. doi:10.1666/07-147R.1
- Guo, J.; Y. Li; J. Han; X. Zhang; Z. Zhang; Q. Ou; J. Liu; D. Shu, and S. Maruyama and T. Komiya. 2008. Fossil association from the Lower Cambrian Yanjiahe Formation in the Yangtze Gorges area, Hubei, south China. Acta Geologica Sinica 82. 1124–1132.
Further reading
- J. Guo, Y. Li, and G. Li. 2014. Small shelly fossils from the early Cambrian Yanjiahe Formation, Yichang, Hubei, China. Gondwana Research 25:999-1007
- P. Chen. 1984. Discovery of Lower Cambrian small shelly fossils from Jijiapo, Yichang, west Hubei and its significance. Professional Papers of Stratigraphy and Palaeontology 13:49-64
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