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Yingzuishan Formation

Yingzuishan Fm

Period: 
Triassic

Age Interval: 
Late Triassic T3 (TJ82 region)


Province: 
Hunan, Hubei

Type Locality and Naming

Hunan geological bureau area survey team named in 1976. Hunan Bureau of Geology and Mineral Resources first publicly quoted in 1988. The named section is located in Yingzui Mountain, Huayuan, Sangzhi County, northwestern-most Hunan Province.

Synonym:


Lithology and Thickness

It is mainly composed of yellow-gray, yellow-green fine sandstone and sandy mudstone, with a thickness of 300 meters.


Lithology Pattern: 
Fine-grained sandstone


Relationships and Distribution

Lower contact

The conglomerate at the bottom is in false conformable contact with the purplish red sandy mudstone of the underlying Triassic Badong Fm without peaking.

Upper contact

No information given. Next younger regional unit is the siltstone of the Jiuligang Fm or of the Shazhenxi Fm.

Regional extent

Sangzhi County, northwestern-most Hunan (Hunan-southeast Hubei border)


GeoJSON

null

Fossils

Plants: Bernoullia zeilleri, Pterophyllum sp., Thinnfeldia sp., Pachypteris sp., Nilssonia orientalis, Neocalamites carrerei


Age 

" Late Triassic" ?? Stratigraphic constraints of Badong Fm (Anisian-early Ladinian) and Jiuligang Fm (latest Carnian-Norian) in this same region constrain placement.

Age Span: 

    Beginning stage: 
Carnian

    Fraction up in beginning stage: 
0.0

    Beginning date (Ma): 
237.00

    Ending stage: 
Carnian

    Fraction up in the ending stage: 
0.5

    Ending date (Ma):  
232.15

Depositional setting

It is interpreted as continental deposit.


Depositional pattern:  


Additional Information


Compiler:  

Zhou Huiqin, Zhou Ze and Tong Jinnan.