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Bamudi Formation
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Bamudi Fm base reconstruction

Bamudi Fm

Period: 
Cretaceous

Age Interval: 
Early Cretaceous, K1bm (27a,b,c)


Province: 
Shandong

Type Locality and Naming

Jiaolai Basin. The Bamudi Formation was named by Du Benming et al. (1991) the Jimo City of Shandong. The type section is in Bamudi Village of Diaojiadazhang, Fengcheng Town of the Jimo City.


Lithology and Thickness

The Bamudi Formation is a group of volcanic rocks. It consists of grayish red, grayish green andesite breccia agglomerate, pyroxene andesite, with intercalations of pyroxene basalt, trachyandesite and tuffaceous breccia. It is about 355 - 731 m in thickness.


Lithology Pattern: 
Volcanics


Relationships and Distribution

Lower contact

In western Shandong, the Bamudi Formation is unconformably overlying the Malianpo Fm. In eastern Shandong, it is between the Qugezhuang Fm and Fanggezhuang Fm.

Upper contact

Regional extent

In western Shandong, the Bamudi Formation is unconformably underlying the Guanzhuang Fm. In eastern Shandong, it is between the Qugezhuang Fm and Fanggezhuang Fm


GeoJSON

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Fossils

None listed


Age 


Age Span: 

    Beginning stage: 
Aptian

    Fraction up in beginning stage: 
0.3

    Beginning date (Ma): 
118.94

    Ending stage: 
Aptian

    Fraction up in the ending stage: 
0.5

    Ending date (Ma):  
117.30

Depositional setting


Depositional pattern:  


Additional Information


Compiler:  

Wan Xiaoqiao