View source for Earth:Dengying Formation

{{Infobox rockunit
| name           = Dengying Formation
| image          = DuoshantuoDengyingTransition.jpg
| caption        = Transition between uppermost Doushantuo Formation and lowermost Dengying Formation
| type           = Formation
| period         = Ediacaran
| age            = [[Earth:Ediacaran|Ediacaran]]<br>~{{fossil range|551|541}}
| prilithology   =
| otherlithology =
| namedfor       =
| namedby        =
| region         = Yangtze Gorges
| country        = {{CHN}}
| coordinates    =
| unitof         =
| subunits       = See: Members
| underlies      = [[Earth:Yanjiahe Formation|Yanjiahe Formation]]<ref name="DongEtAl2009">{{cite journal |last1=Dong |first1=Lin |last2=Xiao |first2=Shuhai |last3=Shen |first3=Bing |last4= Zhou |first4= Chuanming |last5= Guoxiang |first5= Li |last6=Yao |first6=Jinxian |date=2009 |title=Basal Cambrian Microfossils from the Yangtze Gorges Area (South China) and the Aksu Area (Tarim Block, Northwestern China) |url=http://jpaleontol.geoscienceworld.org/content/83/1/30.abstract |journal=Journal of Paleontology |volume=83|issue=1 |pages=30–34 |doi=10.1666/07-147R.1  |s2cid=129410378 |accessdate=15 August 2014}}</ref>
| overlies       = [[Earth:Doushantuo Formation|Doushantuo Formation]]
| thickness      =
| extent         =
| area           =
| map            =
| map_caption    =
}}

The '''Dengying Formation''' is an upper [[Earth:Ediacaran|Ediacaran]] (551-541 Ma<ref name="Condon2005">{{cite journal|last1=Condon|first1=Daniel|last2=Zhu|first2=Maoyan|last3=Bowring|first3=Samuel|last4=Wang|first4=Wei|last5=Yang|first5=Aihua|last6=Jin|first6=Yugan|date=2005|title=U–Pb ages from the Neoproterozoic Doushantuo Formation, China|journal=Science|volume=308|issue=5718|pages=5–98|doi=10.1126/science.1107765|pmid=15731406|jstor=3841402|s2cid=11673032|doi-access=free}}</ref>) fossiliferous geologic formation found in South China. It was deposited on a shallow marine [[Chemistry:Carbonate|carbonate]] platform.<ref name="ZhouXiao2006">{{cite journal |last1=Zhou |first1=Chuanming |last2=Xiao |first2=Shuhai |date=2006 |title=Ediacaran .δ13C chemostratigraphy of South China |journal=Chemical Geology |volume=237 |issue=1–2 |pages=89–108 |doi=10.1016/j.chemgeo.2006.06.021 }}</ref>

==Members==
Listed by ascending age:
* The '''Hamajing Member''' is characterized by light grey, medium- to thick-bedded [[Earth:Dolomite (rock)|dolomite]], intercalated with thin layers of [[Earth:Chert|chert]].<ref name="ZhouXiao2006" />
* The '''Shibantan Member''' is interpreted to represent a subtidal environment and is composed of dark grey, thin-bedded bituminous [[Earth:Limestone|limestone]]. It is the most fossiliferous of the Dengying Formation members and has yielded several trace fossils, such as ''Lamonte''.<ref name="MeyerEtAl2014">{{cite journal |last1=Meyer |first1=Mike |last2=Xiao |first2=Shuhai |last3=Gill |first3= Benjamin C. |last4=Schiffbauer |first4=James D. |last5=Chen |first5=Zhe|last6=Zhou|first6=Chuanming|last7=Yuan|first7=Xunlai|date=2014 |title=Interactions between Ediacaran animals and microbial mats: Insights from ''Lamonte trevallis'', a new trace fossil from the Dengying Formation of South China |journal=Palaeogeography, Palaeoclimatology, Palaeoecology |volume=396 |pages=62–74 |doi=10.1016/j.palaeo.2013.12.026 }}</ref>
* The '''Baimatuo Member''' consists of light grey, thick-bedded dolomite.<ref name="ZhouXiao2006" />

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 [[Earth:Cambrian|Cambrian]] [[Earth:Yanjiahe Formation|Yanjiahe Formation]].<ref name="ZhouXiao2006" />

==Genera==
* ''[[Biology:Cloudina|Cloudina]]''
* ''Paracharnia''
* ''[[Biology:Sinotubulites|Sinotubulites]]''
* ''Yangtziramulus''

==Ichnogenera==
* ''Helminthoidichnites''
* ''Lamonte''
* ''Torrowangea''

==See also==
* List of fossiliferous stratigraphic units in China
* [[Earth:Ediacaran biota|Ediacaran biota]]

==References==
{{reflist}}

[[Category:Phosphorite formations]]

{{Sourceattribution|Dengying Formation}}