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Leigongjian Formation

Leigongjian Fm


Period: 
Silurian

Age Interval: 
Telychian of Silurian (S1), (southeast of 43)


Province: 
Hubei

Type Locality and Naming

It was proposed in 1976 by the 8th Geological Party of, and published in 1990 by, the Hubei Bureau of Geology and Mineral Resources. The type section is located at Leigongjian, southwest of Liulin in southern part of Suizhou, Hubei Province.

Synonym: (雷公尖组)


Lithology and Thickness

It consists of light gray, gray green, loess-yellow thin-to-thick-bedded metamorphosed quartzose micritic sandstone and metamorphosed micritic sandstone, intercalated with green sericitic phyllite.


Lithology Pattern: 
Sandstone


Relationships and Distribution

Lower contact

It is pseudo-conformably underlain by the Lanjiafan Fm

Upper contact

The formation composes the syncline core with no top observed

Regional extent

It is steady in lithology and hard against weathering, often forming precipitous mountain peaks. The formation varies in thickness, at most reaching 404 m, and is mainly exposed in southern part of Suizhou, Hubei Province.


GeoJSON

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Fossils

It bears brachiopods Striispirifer sp., Nalivkinia sp.; trilobite Encrinuroides sp., etc.


Age 


Age Span: 

    Beginning stage: 
Telychian

    Fraction up in beginning stage: 
0.0

    Beginning date (Ma): 
438.59

    Ending stage: 
Telychian

    Fraction up in the ending stage: 
1.0

    Ending date (Ma):  
432.93

Depositional setting


Depositional pattern:  


Additional Information


Compiler:  

Wang Chuanshang and Wang Xiaofeng