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
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.