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Fuzikuang Formation
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Fuzikuang Fm base reconstruction

Fuzikuang Fm

Period: 
Neoproterozoic

Age Interval: 
Early Qingbaikouan (early Tonian), Qb （26-a）


Province: 
Shandong

Type Locality and Naming

Northeast peninsula of Shandong. The Fuzikuang Fm was named by the Jiaodong Team of Regional Geological Survey in Changchun Institute of Geology in 1960, and firstly quoted by China Commission on Stratigraphy in 1962. The typical section is located in Fuzikuang, Qixia County, Shandong Province.

Synonym: （辅子夼组）


Lithology and Thickness

The Fuzikuang Fm is dominated by white, medium-to thick-bedded quartzite intercalated with blue gray, brownish yellow and brownish red slate and thin-bedded quartzite. Some quartzite has ripple marks and cross-beddings. The total thickness varies from 580 to 830 m.


Lithology Pattern: 
Clayey sandstone


Relationships and Distribution

Lower contact

The basal part of white thick-bedded quartzite conformably overlies the blue-gray slate of the underlying Baoshankou Fm

Upper contact

The top part of uppermost brownish yellow thin-bedded quartzite is conformably bounded by the dark gray siliceous slate of the overlying Mashan Fm; or it is disconformably overlain by the Xiangkuang Fm. [NOTE: Xiangkuang Fm is now assigned to Mesoproterozoic?]

Regional extent

Northeast peninsula of Shandong. With a persistent lithology, the Fuzikuang Fm is restricted to Fuzikuang of Qixia County to Gaotong of Fushan County, and locally outcrops in north Penglai County and Qimu Island in Longkou of Huangxian County.


GeoJSON

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Fossils

It yields microplants: Leiopsophosphaera aperta, L. densa, Trachysphaeridium simplex, T. incrassatum, Trematosphaeridium minutum, Paleamorpha punctulata, Leiominuscula minuta etc.


Age 

Early Qingbaikouan (early Tonian) on schematic stratigraphic column (but had a "Z" code previously).

Age Span: 

    Beginning stage: 
Tonian

    Fraction up in beginning stage: 
0.15

    Beginning date (Ma): 
958.00

    Ending stage: 
Tonian

    Fraction up in the ending stage: 
0.3

    Ending date (Ma):  
916.00

Depositional setting


Depositional pattern:  


Additional Information


Compiler:  

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