Wangyinpu Fm
Type Locality and Naming
The type section of Wangyinpu Formation is the Huangyingpu section, about 2.6 km southwest of Henglu Town, or about 16.5 km north of the seat of Wuning County, Jiangxi Province (115°06’E, 29°25’N). The section was remeasured by the Jiangxi Regional Geological Survey Team in 1966. The Wangyinpu Formation was named by Li (1933). The name is derived from Huangyingpu (which was misunderstood as Wangyinpu) Village in Henglu Township, Wuning County, northwestern Jiangxi Province. Originally the unit was called Wangyinpu series by Li (1933) and was formally published as Wangyinpu Formation by Lu (1962) based on a 1959 manuscript, in which the formation name was first used, by the Research Group on Stratigraphy of Jiangxi Regional Geological Survey Team.
Synonym: （王音铺组）
Lithology and Thickness
The Wangyinpu Formation is basically a fine clastic sequence with siliceous rocks in the lower part. Lower part consists of greyish black, thin-bedded chert, alternated with carbonaceous shale and bears bone coal or high-carbon shale at base. Upper part of the formation merely consists of carbonaceous shale. In the type section, the Wangyinpu Formation is 251.90 m thick.
Relationships and Distribution
Lower contact
The Wangyinpu Fm is in conformable contact with either the underlying Piyuancun Fm or underlying Tongying Fm. The lower boundary of the Wangyinpu Fm is marked by lithological change either from the dolomite of Tongying Fm or the siliceous rock of Piyuancun to the bone coal or to the high-carbon shale of Wangyinpu Fm.
Upper contact
It is overlain conformably by Kuanyintang Fm. The upper boundary is marked by lithological change from grey or black carbonaceous shale at the top of Wangyinpu Fm to yellowish or greyish green shale at the base of Kuanyintang Fm.
Regional extent
The Wangyinpu Formation is exposed in the Jiangnan Slope Area of South China Region, restricted to northwestern and northern Jiangxi Province (Xiushui, Wuning, Jiujiang and Pengze counties of Jiujiang City). The thickness of the formation ranges usually from 110 m to 220 m.
GeoJSON
Fossils
The upper part of the formation yields sponge-spicules Protospongia sp.
Age
Depositional setting
Additional Information