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Chaowanping Formation

Chaowanping Fm

Period: 
Mesoproterozoic

Age Interval: 
Yuxian (Stenian) Yx (34)


Province: 
Sichuan

Type Locality and Naming

Mid-South Sichuan. The Chaowanping Fm was named by Southwest Institute of Geology in 1965. The type section is at Dengxiangying-Chaowanping, Xide County, Sichuan Province. One middle formation within the Dengxiangying Gr.

Synonym: （朝王坪组）


Lithology and Thickness

In the typical section, the Chaowanping Fm is composed of nonuniformly interbedded grey meta-sandstone, siltstone and phyllite, with meta-micro-conglomerate. The formation is 1864 m thick.


Lithology Pattern: 
Fine-grained sandstone


Relationships and Distribution

Lower contact

It is in conformable contact with the overlying Darezha Fm (previously Dengxiangying Fm)

Upper contact

It is in conformable contact with the underlying Zegu Fm

Regional extent

Mid-South Sichuan. It is distributed around Dengxiangying-Chaowanping in Xide County and in Mianning County, Sichuan Province.


GeoJSON

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Fossils


Age 


Age Span: 

    Beginning stage: 
Stenian

    Fraction up in beginning stage: 
0.2

    Beginning date (Ma): 
1,160.00

    Ending stage: 
Stenian

    Fraction up in the ending stage: 
0.5

    Ending date (Ma):  
1,100.00

Depositional setting


Depositional pattern:  


Additional Information


Compiler:  

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