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Pingshui Formation
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Pingshui Fm base reconstruction

Pingshui Fm

Period: 
Neoproterozoic

Age Interval: 
earliest Qingbaikouan (earliest Tonian), Qb (61)


Province: 
Zhejiang

Type Locality and Naming

North Zhejiang. The Pingshui Fm was named by the Party of Regional Geological Survey, Zhejiang Bureau of Geology and Mineral Resources in 1990 and published in 1992 by Lin Qinglong (as aa Pingshui Gr). The type section is in Hengbangling, Bingkang and Baihedian, Pingshui Township, Shaoxing City, Zhejiang Province. Lowermost formation of the Shuangxiwu Gr.

[Figure: Type section of Pingshui Fm]

Synonym: （平水组）


Lithology and Thickness

The Pingshui Fm is litho logically composed of metamorphosed spilite, spilitic porphyrite, spilitic tuff, brecciated vitroclastic tuff, keratophyre and tuff, intercalated with chert, siltstone, sandstone, sandstone-conglomerate and mudstone. The exposed thickness is recorded as over 2943 m.


Lithology Pattern: 
Volcanics


Relationships and Distribution

Lower contact

Bottom is not seen.

Upper contact

It is in fault contact with overlying Beiwu Fm

Regional extent

North Zhejiang. It is distributed mainly around Pingshui, Shaoxing, Zhejiang Province.


GeoJSON

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Fossils


Age 

There is a SHRIMP U-Pb date of 905±6 Ma from the Pingshui Fm (Gao Linzhi et al., 2014). earliest Qingbaikouan (earliest Tonian) on schematic stratigraphic section.

Age Span: 

    Beginning stage: 
Tonian

    Fraction up in beginning stage: 
0.0

    Beginning date (Ma): 
1,000.00

    Ending stage: 
Tonian

    Fraction up in the ending stage: 
0.1

    Ending date (Ma):  
972.00

Depositional setting


Depositional pattern:  


Additional Information

Lin Qinglong (1992) had classified the Pingshui Fm as a Pingshui Gr and, attributed it chronologically to the Early stage of Neoproterozoic Era.


Compiler:  

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