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Songshu Formation
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Songshu Fm base reconstruction

Songshu Fm

Period: 
Neoproterozoic

Age Interval: 
Early Qingbaikouan (early Tonian), Qb (24)


Province: 
Liaoning

Type Locality and Naming

Southeast Liaoning. The Songshu Fm was named by Yu Jianzhang, Cui Shengqin and Qiu Ganlin in 1964. The typical section is situated in the coast west of Songshu Town to Dashitou in the Yongning Basin of Fuxian County, Liaoning Province. Lowermost formation of Yongning Gr.

Synonym: （松树组）


Lithology and Thickness

The Songshu Fm is a suite of detrital rock dominated by quartzose sandstone with lower roundness and maturity, which is composed of pink red thick-bedded, fine- to medium-gravel conglomerate and breccia, flesh-pink thick-bedded pebbly feldspathic greywacke and white gray to dark gray medium- to coarse-grained feldspathic quartzose greywacke.


Lithology Pattern: 
Coarse-grained sandstone


Relationships and Distribution

Lower contact

The Songshu Fm overlies unconformably the underlying Anshan Group (migmatitic granite).

Upper contact

Regional extent

It is limitedly distributed in the Yongning Basin of Fuxian County and Lushun area (Jiushijie).


GeoJSON

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Fossils


Age 

Earliest Qingbaikouan (earliest Tonian) on schematic stratigraphic section

Age Span: 

    Beginning stage: 
Tonian

    Fraction up in beginning stage: 
0.0

    Beginning date (Ma): 
1,000.00

    Ending stage: 
Tonian

    Fraction up in the ending stage: 
0.15

    Ending date (Ma):  
958.00

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.