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Laohutang Formation
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Laohutang Fm base reconstruction

Laohutang Fm

Period: 
Neoproterozoic

Age Interval: 
Sinian (Ediacaran), Z (64)


Province: 
Jiangxi

Type Locality and Naming

West-central Jiangxi. The Laohutang Fm was named by the Jiangxi Party of Regional Geological Survey in 1963 and formally quoted in 1965 (Guidebook of 1: 200 000 Scale Geological Map of Xinyu Sheet). The typical section is situated in Upper Laohutang in Xiajiang County, Jiangxi Province.

Synonym: （老虎塘组）


Lithology and Thickness

The Laohutang Fm is dominantly composed of dark gray and greenish gray medium-to thick-bedded blasto-tuffstone, blasto-tuffaceous arkosic sandstone intercalated with sericite-phyllite, tuffaceous phyllite and carbonaceous phyllite. The top commonly contains calcareous phyllite, chert and limestone. The total thickness is about 430 m.


Lithology Pattern: 
Volcanic ash


Relationships and Distribution

Lower contact

It conformably overlies the Xiafang Fm

Upper contact

It conformably underlies the Banli Fm; but Niujiaohe Fm is shown on schematic stratigraphic column.

Regional extent

Xiajiang County, Jiangxi Province.


GeoJSON

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Fossils


Age 

Sinian (Ediacaran)

Age Span: 

    Beginning stage: 
Ediacaran

    Fraction up in beginning stage: 
0.0

    Beginning date (Ma): 
635.00

    Ending stage: 
Ediacaran

    Fraction up in the ending stage: 
1.0

    Ending date (Ma):  
538.80

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.