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Houkuang Formation
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Houkuang Fm base reconstruction

Houkuang Fm

Period: 
Cretaceous

Age Interval: 
Early Cretaceous, K1hk (27b)


Province: 
Shandong

Type Locality and Naming

Du Benming et al. (1991) erected the Houkuang Formation in the Houkuang Village of Hexiguoxiang, Jiaozhou City. The type locality is in the Houkuang section of Hexiguoxiang (119°55', 36°05').


Lithology and Thickness

Jiaolai Basin. The Houkuang Formation belongs to the 1st eruptive beds of the Qingshan volcanism. It is mostly composed of rhyolitic tuff, rhyolitic breccia tuff, rhyolitic volcanic breccias, rhyolitic breccias lava, with intercalations locally of basaltic trachyandesite, conglomerates and sandstones. The formation is 48.1 m-391.5 m in thickness.

[Figure: Houkuang Formation in Shenglizhuang section of Laiyang City]


Lithology Pattern: 
Volcanics


Relationships and Distribution

Lower contact

It contacts with the underlying Longwangzhuang Fm unconformably.

Upper contact

It contacts with the overlying Bamudi Fm conformably

Regional extent

The formation occurs in the Laiyang and Zhucheng areas.


GeoJSON

{"type":"Feature","geometry":{"type":"MultiPolygon","coordinates":[[[[120.41,36.39],[120.37,36.21],[120.26,35.98],[119.73,35.63],[119.35,35.3],[119.24,35.22],[119.18,35.22],[119.19,35.3],[119.23,35.53],[119.3,35.79],[119.4,36.01],[119.49,36.08],[119.79,36.31],[120.06,36.5],[120.28,36.52],[120.41,36.39]]]]}}

Fossils

None listed


Age 


Age Span: 

    Beginning stage: 
Aptian

    Fraction up in beginning stage: 
0.1

    Beginning date (Ma): 
120.58

    Ending stage: 
Aptian

    Fraction up in the ending stage: 
0.3

    Ending date (Ma):  
118.94

Depositional setting


Depositional pattern:  


Additional Information


Compiler:  

Wan Xiaoqiao