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Shuijing Formation
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Shuijing Fm base reconstruction

Shuijing Fm

Period: 
Neoproterozoic

Age Interval: 
Late Sinian (late Ediacaran), Z (40)


Province: 
Sichuan

Type Locality and Naming

Sichuan south of Gansu. The Shuijing Fm was named by the No. 2 Party of Regional Geological Survey, Sichuan Bureau of Geology in 1977. The typical section is situated in Shuijing Township in Pingwu County, Sichuan Province.

Synonym: （水晶组）


Lithology and Thickness

The Shuijing Fm is dominantly composed of gray to light gray crystalline dolomite, siliceous dolomite, dolomite and siliceous dolomitic marble intercalated with white gray marble and dark gray crystalline limestone, which can intercalate with slate and pelitic limestone along strike. The top is intercalated with black chert and the basal part with carbonaceous phyllite, bearing stromatolites and microplants.


Lithology Pattern: 
Dolomite


Relationships and Distribution

Lower contact

The Shuijing Fm overlies conformably the underlying Upper Sinian Wugongkou Fm

Upper contact

It is disconformably or unconformably overlain by the Lower Cambrian Qiujiahe Fm (or a Tielongpu Fm of Lower Cambrian also shown on stratigraphic column for this region).

Regional extent

Sichuan south of Gansu. It is mainly distributed in Motianling, Houlongmen Mountain and Gongling areas.


GeoJSON

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Fossils


Age 

Late Sinian (late Ediacaran) on schematic stratigraphic column.

Age Span: 

    Beginning stage: 
Ediacaran

    Fraction up in beginning stage: 
0.5

    Beginning date (Ma): 
586.90

    Ending stage: 
Ediacaran

    Fraction up in the ending stage: 
1.0

    Ending date (Ma):  
538.80

Depositional setting


Depositional pattern:  


Additional Information


Compiler:  

Extracts from The Neoproterozoic Erathem (chapter in Stratigraphic Lexicon of China, draft of 2022) by Gao Linzhi, Ding Xiaozhong, Zhang Chuanheng, Zhang Heng.