Caohai Fm
Period:
Carboniferous
Age Interval:
(47)
Province:
Guizhou
Type Locality and Naming
Caohai located between Yanzitang and Shilipu, south of Weining County, Guizhou Province. Named by Wu Wangshih, Zhang Linhsin, Jin Yukan, 1974, The Carboniferous Rocks of Western Kuichow, Memoirs of Nanjing Institute of Geology and Palaeontology, Chinese Academy of Sciences, (6): 72–98.
Lithology and Thickness
Caohai Formation is subdivided into Yazitang Member (lower), Shilipu Member (middle) and Xinguanting Member (upper), consists of marls, muddy limestone and limestone
Lithology Pattern:
Shallow-marine marl
Relationships and Distribution
Lower contact
Conformable contact with the underlying Bojiwan Fm
Upper contact
Conformable contact with the overlying Dewu Fm or Zhaojiashan Fm
Regional extent
GeoJSON
null
Fossils
Age
Early Carboniferous
Age Span:
Beginning stage:
Visean
Fraction up in beginning stage:
0.33
Beginning date (Ma):
341.32
Ending stage:
Visean
Fraction up in the ending stage:
1.0
Ending date (Ma):
330.34
Depositional setting
Depositional pattern:
Additional Information
Compiler:
Geological Formation Names of China (1866–2000) pp 96-96; https://link.springer.com/chapter/10.1007/978-3-540-93824-8_658