Qilijiang Fm
Type Locality and Naming
The type section is located at Xikuangshan Hill, Xinhua County of central Hunan Province.
It was named by Wang Yuelung and Zhang Zhaojin in 1934 and was published by Wang Xiaoqing in 1938.
Lithology and Thickness
Limestone. The lithology is mainly characterized by thick-bedded limestone, intercalated with clayey limestone and few shales and clayey siltstone, and contains abundant corals and brachiopods.
Relationships and Distribution
Lower contact
The lower boundary is drawn on the basis of the appearance of limestone and easily separated from the underlying sandstone of the Longkouchong Fm. It rests conformably on the Baqi Fm or Liujiang Fm in southern Hunan.
Upper contact
Regional extent
The formation is widely exposed in central Hunan with changeable thickness: 200 m in Lenchuijiang, 300 m in Lianyuan-Xinshao, 40 m in Xiangtan, and less than 10 m in Shaodong.
GeoJSON
Fossils
It contains corals Phillipsastrea sp., Sinodisphyllum sp., Pseudozaphrentis sp., Hexagonaria sp.; brachiopods Tenticospirifer sp., Cyrtospirifer sp., Spinatrypa sp.; ammonoid Manticoceras spp.; and stromatoporoids and ostracods.
Age
Depositional setting
Additional Information