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Shuinan Formation
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Shuinan Fm base reconstruction

Shuinan Fm

Period: 
Cretaceous

Age Interval: 
Early Cretaceous, K1sn (27a)


Province: 
Shandong

Type Locality and Naming

Jiaolai Basin. The Shuinan Formation was named by the No 1 Petroleum Exploration Team in 1962. The type locality is in the Shuinan Village of the Laiyang City, Shandong. The key section is in 2 km north to the Shuinan Village of the Laiyang City (120°53’, 36°59').


Lithology and Thickness

The Shuinan Formation is a group of grayish green, dark grey and yellowish green siltstone and shale. It is 200 m – 460 m in thickness.


Lithology Pattern: 
Siltstone


Relationships and Distribution

Lower contact

The formation is conformably overlying the Zhifengshan Fm (Zhifenzhuang Fm) in eastern Shandong, and unconformably overlying the Zibo Gr in western Shandong.

Upper contact

It is conformably underlying the Longwangzhuang Fm.

Regional extent

The Shuinan Formation is wide distributed in Laiyang and Haiyang area of eastern Shandong.


GeoJSON

{"type":"Feature","geometry":{"type":"MultiPolygon","coordinates":[[[[120.83,37.28],[121.28,37.2],[121.32,37.11],[121.27,36.96],[121.07,36.76],[120.73,36.46],[120.58,36.38],[120.5,36.39],[120.42,36.5],[120.39,36.69],[120.44,36.96],[120.54,37.12],[120.83,37.28]]]]}}

Fossils

None listed


Age 


Age Span: 

    Beginning stage: 
Hauterivian

    Fraction up in beginning stage: 
0.8

    Beginning date (Ma): 
127.72

    Ending stage: 
Barremian

    Fraction up in the ending stage: 
0.6

    Ending date (Ma):  
123.44

Depositional setting

It is of shallow lake and fluvial fan facies.


Depositional pattern:  


Additional Information


Compiler:  

Wan Xiaoqiao