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Chengshanhou Formation
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Chengshanhou Fm base reconstruction

Chengshanhou Fm

Period: 
Cretaceous

Age Interval: 
Early Cretaceous, K1cs (27c)


Province: 
Shandong

Type Locality and Naming

Western Shandong. The Chengshanhou Formation was named by Song Yuli and described by Zhang Zengqi (1996).


Lithology and Thickness

The Chengshanhou Formation is divided into 2 parts. Lower part is composed of yellowish grey, grayish green tuffaceous gravel-bearing sandstone interbedded with tuffaceous fine-grained sandstone. Upper part consists of grayish purple andesite breccias, intercalated with grayish green, yellowish tuffaceous sandy conglomerate and gravel-bearing sandstone. It is 343-2462 m in thickness.


Lithology Pattern: 
Sandstone


Relationships and Distribution

Lower contact

The Chengshanhou Formation is conformably overlies the Fenshuiling Fm.

Upper contact

It is conformably underlying the Malianpo Fm.

Regional extent

The Chengshanhou Formation is distributed in western Shandong.


GeoJSON

{"type":"Feature","geometry":{"type":"MultiPolygon","coordinates":[[[[118.99,36.29],[119.16,36.29],[119.31,36.2],[119.39,36.08],[119.34,35.96],[119.14,35.18],[118.94,35.04],[118.94,34.78],[118.87,34.31],[118.71,34.15],[118.55,34.08],[118.47,34.13],[118.39,34.27],[118.42,34.39],[118.43,34.58],[118.47,34.98],[118.49,35.49],[118.69,36.07],[118.99,36.29]]]]}}

Fossils

None listed


Age 


Age Span: 

    Beginning stage: 
Valanginian

    Fraction up in beginning stage: 
0.2

    Beginning date (Ma): 
136.68

    Ending stage: 
Barremian

    Fraction up in the ending stage: 
0.1

    Ending date (Ma):  
125.99

Depositional setting

The lower part is of fluvial – shallow lake facies; the upper part shows volcanic clastic and fluvial sediments.


Depositional pattern:  


Additional Information


Compiler:  

Wan Xiaoqiao