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Guanyinge Formation
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Guanyinge Fm base reconstruction

Guanyinge Fm

Period: 
Neoproterozoic

Age Interval: 
Earliest Qingbaikouan (Earliest Tonian), Qb (50)


Province: 
Jiangxi

Type Locality and Naming

Northwest corner of Jianxi. The Guanyinge Fm was named by the Jiangxi Party of Regional Geological Survey in 1982 and was formally published by Xu Bei in 1987. The typical section is situated at Guanyinge, 4 km north of Xiushui County, Jiangxi Province. Lower formation in Xiushui Gr

Synonym: （覌音阁组）


Lithology and Thickness

The Guanyinge Fm is subdivided into four members. In ascending order: First member is composed of yellowish massive conglomerate in lower part and yellow massive tuffaceous lithic greywacke in the upper part. Second member is gray thin-bedded tuffaceous lithic arkosic greywacke interbedded with carbonaceous slate, with two cycles. Third member consists of greenish gray tuffaceous lithic quartzose greywacke, silty slate and sandy slate. Fourth member is gray fine-grained sandstone interbedded with slate. The Guanyinge Fm is about 480 m thick.


Lithology Pattern: 
Clayey sandstone


Relationships and Distribution

Lower contact

The Guanyinge Fm unconformably overlies the underlying Jiuling Gr

Upper contact

It is conformably overlain by the Chengshanting Fm

Regional extent

Northwest corner of Jianxi. Xiushui County, Jiangxi Province.


GeoJSON

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Fossils

It yields microplants: Trachysphaeridium incrassatum, T. chihsienense, T. planum, Leiopsophosphaera minor, L. infriata etc.


Age 

Earliest Qingbaikouan (Earlist 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: 
0.2

    Ending date (Ma):  
944.00

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.