Dengying Formation
Stratigraphic range: Ediacaran
~
Transition between uppermost Doushantuo Formation and lowermost Dengying Formation
TypeFormation
Sub-unitsSee: Members
UnderliesYanjiahe Formation[1]
OverliesDoushantuo Formation
Location
RegionYangtze Gorges
Country China

The Dengying Formation is an upper Ediacaran (551-541 Ma[2]) fossiliferous geologic formation found in South China. It was deposited on a shallow marine carbonate platform.[3]

Members

Listed by ascending age:

  • The Hamajing Member is characterized by light grey, medium- to thick-bedded dolomite, intercalated with thin layers of chert.[3]
  • The Shibantan Member is interpreted to represent a subtidal environment and is composed of dark grey, thin-bedded bituminous limestone. It is the most fossiliferous of the Dengying Formation members and has yielded several trace fossils, such as Lamonte.[4]
  • The Baimatuo Member consists of light grey, thick-bedded dolomite.[3]

Traditionally, the Tianzhushan Member was considered to be the uppermost unit of the Dengying Formation. However, its small shelly fossils and Micrhystridium-like acritarchs are a shared characteristic with the Cambrian Yanjiahe Formation.[3]

Genera

Ichnogenera

  • Helminthoidichnites
  • Lamonte
  • Torrowangea

See also

References

  1. ↑ 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)". Journal of Paleontology. 83 (1): 30–34. doi:10.1666/07-147R.1. S2CID 129410378. Retrieved 15 August 2014.
  2. ↑ Condon, Daniel; Zhu, Maoyan; Bowring, Samuel; Wang, Wei; Yang, Aihua; Jin, Yugan (2005). "U–Pb ages from the Neoproterozoic Doushantuo Formation, China". Science. 308 (5718): 5–98. doi:10.1126/science.1107765. JSTOR 3841402. PMID 15731406. S2CID 11673032.
  3. 1 2 3 4 Zhou, Chuanming; Xiao, Shuhai (2006). "Ediacaran .δ13C chemostratigraphy of South China". Chemical Geology. 237 (1–2): 89–108. doi:10.1016/j.chemgeo.2006.06.021.
  4. ↑ Meyer, Mike; Xiao, Shuhai; Gill, Benjamin C.; Schiffbauer, James D.; Chen, Zhe; Zhou, Chuanming; Yuan, Xunlai (2014). "Interactions between Ediacaran animals and microbial mats: Insights from Lamonte trevallis, a new trace fossil from the Dengying Formation of South China". Palaeogeography, Palaeoclimatology, Palaeoecology. 396: 62–74. doi:10.1016/j.palaeo.2013.12.026.
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