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Wangyou Formation

Wangyou Fm

Period: 
Carboniferous

Age Interval: 
C11 (48, 49), Tournaisian (earliest Early Carboniferous)


Province: 
Guizhou

Type Locality and Naming

Wangyou dome anticline, about 100 km south of Guiyang, the capital city of the Guizhou Province


Lithology and Thickness

Nodular limestone. Condensed deposition associated with intensified rifting. It consists of alternating lime mudstone, bioclastic wackestone, argillaceous limestone, and nodular limestone with intercalations of very thin (< 1 cm) clay layers, rich in conodonts, ammonoids, ostracods, and gastropods. The lowermost 40–50 cm of the Wangyou Formation is now separated as the Gedongguan Bed Fm of uppermost Devonian.


Lithology Pattern: 
Shallow-marine marl


Relationships and Distribution

Lower contact

Conformable contact with the underlying Late Devonian Gedongguan Bed Fm

Upper contact

Conformable contact with the overlying Lingun Fm, Xiaruya Fm or Muhua Fm, depending on location and local nomenclature

Regional extent


GeoJSON

null

Fossils

Conodont faunas of the Siphonodella sulcata zone to Lower Si. crenulata zone.


Age 

Tournaisian (early Early Carboniferous)

Age Span: 

    Beginning stage: 
Tournaisian

    Fraction up in beginning stage: 
0.0

    Beginning date (Ma): 
359.30

    Ending stage: 
Tournaisian

    Fraction up in the ending stage: 
0.2

    Ending date (Ma):  
356.79

Depositional setting


Depositional pattern:  


Additional Information


Compiler:  

Taken from overview articles on Devonian-Carboniferous boundary by Hongfei Hou et al (2022; Earth-Science Reviews), and by Wenkun Qie et al. (2021, Palaeobiodiversity and Palaeoenvironments, 101: 589-611.