Home Multi-Country Search About Admin Login
Cenozoic
Cretaceous
Jurassic
Triassic
Permian
Carboniferous
Devonian
Silurian
Ordovician
Cambrian
Neoproterozoic
Mesoproterozoic

Search by
Select Region(s) to search
Hold Ctrl (Windows/Linux) or Command (Mac) to select multiple
Wagangxi Formation

Wagangxi Fm


Period: 
Mesoproterozoic

Age Interval: 
Yuxian (Stenian), Yx (28)


Province: 
Hubei

Type Locality and Naming

Central-westernmost Hubei. The Wagangxi Fm was named by the Party of Regional Geological Survey, Hubei Bureau of Geology in 1974. The type section is in Songziyuan, Lianghekou, Badong County, Hubei Province. Upper formation (11 of 11 in Lexicon) of Shennongjia Gr.

Synonym: (瓦岗溪组)


Lithology and Thickness

The Wagangxi Fm is composed of magnesian carbonate (dolomitic) rock and minor fine-clastic rock. Lower part consists of grey-white thick-bedded stromatolite-reef-bearing dolomite and greyish, greyish-yellow and light purple fine-crystalline dolomite and muddy dolomite. Middle part is grey thick-bedded stromatolite-bearing limestone and dark-grey thick-bedded medium-crystalline dolomite. Upper part is composed of purple-red medium-thin-bedded muddy dolomite and grey-green, grey-purple dolomitic siltstone. It is recorded as 190-207 m thick.


Lithology Pattern: 
Reef limestone


Relationships and Distribution

Lower contact

It is in disconformable contact with underlying Songziyuan Fm.

Upper contact

The top is unconformably overlain by the Nantuo Fm or by the Macaoyuan Fm formerly within this Shennongjia Gr).

Regional extent

Central-westernmost Hubei. The formation is mainly distributed in Wujiaya, Lianghekou, Badong County of Shennongjia Forest District, and around, Changhe and Songhe rivers, Jingshan County in Dahong Mountain, Hubei Province.


GeoJSON

null

Fossils

Stromatolites occurring in the lower middle and lower parts: Conophyton wagangxiense, Cryptozoon f., Stratifera f. Microplants are Asperatopsophosphaera, Quadratimorpha, Polyporata, Leiominuscula, Leiopsophosphaera.


Age 

Schematic stratigraphic column shows as late Yuxian (late Stenian).

Age Span: 

    Beginning stage: 
Stenian

    Fraction up in beginning stage: 
0.75

    Beginning date (Ma): 
1,050.00

    Ending stage: 
Stenian

    Fraction up in the ending stage: 
1.0

    Ending date (Ma):  
1,000.00

Depositional setting


Depositional pattern:  


Additional Information


Compiler:  

Extracts from The Mesoproterozoic Erathem (chapter in Stratigraphic Lexicon of China, draft of 2022) by Gao Linzhi, Ding Xiaozhong, Zhang Chuanheng, Zhang Heng.