| Yanjiahe Formation | |
|---|---|
| Stratigraphic range: Ediacaran - Fortunian ~542–529 Ma PreꞒ Ꞓ O S D C P T J K Pg N | |
| 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 / 30.8; 111.3 |
| Approximate paleocoordinates | 27°36′N 160°12′E / 27.6°N 160.2°E / 27.6; 160.2 |
| Region | Hubei |
| Country |  China |
| Extent | Yangtze Gorges |
  Yanjiahe Formation (China)Show map of China Yanjiahe Formation (Hubei)Show map of Hubei | |
The Yanjiahe Formation is an Ediacaran to Cambrian fossiliferous geologic formation found in South China.
Fossil content
Among others, the following fossils were found in the formation:
- Aldanella attleborensis
- Anabarites trisulcatus
- Archaeophycus yunnanensis
- Beretella spinosa
- Comasphaeridium annulare
- Conotheca subcurvata
- Emeiconus antiqua
- Heliosphaeridium ampliatum
- ? Konglingiphyton sp.
- Lapworthella sp.
- Megathrix longus
- Micrhystridium regulare
- Protoconites minor
- Protohertzina sp.
- Purella antiqua
- Vendotaenia sp.
- Yanjiahella biscarpa
- Yuknessia sp.
References
- ^ Dong et al., 2009
- ^ Yanjiahe Formation at Fossilworks.org
- ^ Guo et al., 2009
- Wang et al., 2024
- Topper et al., 2019
Bibliography
- Topper, Timothy P.; Guo, Junfeng; Clausen, Sébastien; Skovsted, Christian B.; Zhang, Zhifei (2019), "A stem group echinoderm from the basal Cambrian of China and the origins of Ambulacraria", Nature Communications, 10 (1): 1366, Bibcode:2019NatCo..10.1366T, doi:10.1038/s41467-019-09059-3, ISSN 2041-1723, PMC 6433856, PMID 30911013
- Dong, Lin; Xiao, Shuhai; Shen, Bing; Zhou, Chuanming; Guoxiang, Li; Yao, Jinxian (2009), "Basal Cambrian Microfossils from the Yangtze Gorges Area (South China) and the Aksu Area (Tarim Block, Northwestern China)", Chemical Geology, 83 (1): 30–34, Bibcode:2009JPal...83...30D, doi:10.1666/07-147R.1, retrieved 2014-08-15
- Guo, J.; Li, Y.; Han, J.; Zhang, X.; Zhang, Z.; Ou, Q.; Liu, J.; Shu, D.; Maruyama and T. Komiya, S. (2008), "Fossil association from the Lower Cambrian Yanjiahe Formation in the Yangtze Gorges area, Hubei, south China", Acta Geologica Sinica, 82 (6): 1124–1132, Bibcode:2008AcGlS..82.1124G, doi:10.1111/j.1755-6724.2008.tb00712.x
- Wang, Deng; Qiang, Yaqin; Guo, Junfeng; Vannier, Jean; Song, Zuchen; Peng, Jiaxin; Zhang, Boyao; Sun, Jie; Yu, Yilun (2024-02-19). Early evolution of the ecdysozoan body plan (Report). doi:10.7554/elife.94709.1.
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