Oujiachong Fm
Type Locality and Naming
The type section is located on two sides of Oujiachong to Zhushan Coal Mine Road of Xikuangshan in Xinhua, Hunan.
It was named by Huang Daxin in 1978 and Tan Zhengxiu quoted formally in 1987.
Lithology and Thickness
Shale. It is characterized by black and yellowish-green shale or silty shale, intercalated with fine-grained muscovite sandstone and siltstone.
It is 116 m thick.
Relationships and Distribution
Lower contact
The base of the formation is marked by the appearance of siltstone and shale, therefore is easily to delimit from the thick-bedded limestone of the underlying Magunao member of Xikuangshan Fm; these are in a conformable contact with each other, and the lowermost interval has occasional intercalations of marl and dolomitic limestone.
Upper contact
Regional extent
This formation is distributed in Xinhua, Lianyuan, Xinshao areas in central Hunan.
GeoJSON
Fossils
It yields fish fossil Bothriolepis sp., plant fossil Leptophloeum sp., and a few inarticulata brachiopods.
Age
Depositional setting
It is interpreted as a delta facies
Additional Information