Wuxue Fm
Type Locality and Naming
The type section is located at Dalaoshan of Wuxue City (known originally as the Wuxue Country, Guangzi County), eastern Hubei Province. Its eastern segment is represented by the Qiaomeitang section in the Wuxue area. Its western segment is represented in the Xifanyi area. It was named by Chen Xu in 1935.
Lithology and Thickness
Limestone. It is composed mainly of light-grey to dark-grey, thick-bedded to massive, cherty concretion-bearing biomicrite and bioclastic limestone, with its base consisting of dark-grey thin-bedded limestone and carbonaceous limestone, containing cherty concretions or bands. In the Wuxue area the formation is thicker in the west and thinner in the east in a range of 102-220 m. Westward to the Jingshan and Nanzhang areas it is 50-150 m thick, while in the Jingmen-Yichang area it is only 10-50 m thick.
Relationships and Distribution
Lower contact
Conformable contact with the underlying Gufeng Fm (Kufeng Fm)
Upper contact
Regional extent
The formation is E-W-trending and is distributed in the Wuxue-Tanqiao-Xifanli belt, extending easterly to the territory of Anhui Province, and thinning out southward to the northern flank of the Early Permian carbonate platform in the Chongyang-Tongshan area.
GeoJSON
Fossils
Yields abundant benthos fossils, among which there are Fusulinids such as Neoschwagerina haydeni, N. multicircum, Sumatrina sp., Yabeina hayasakai, Y. gubleri, Metadoliolina lepida, Chusenella tingi, C. globularis, etc.; and Corals such as Tachylasma magnum Paracaninia liangshanensis, etc.
Age
Depositional setting
It is interpreted as a shallow-sea open platform-facies
Additional Information