Wangshan Fm

North Anhui. The Wangshan Fm was jointly named by the Jiangsu and Anhui Parties of Regional Geological Survey in 1976, which is first quoted in the Guidebook of 1: 200 000 Scale Geological Map of Xuzhou Sheet 1(978). The Wangshan Formation is located at Wangshan Hills between Xieji and Langan villages, Suxian County, Anhui Province. The type section includes two parts, the middle and lower parts are exposed in the Shijia section, the upper part is represented by the Jinshanzhai section in Suxian County, Anhui Province.

Synonym: （望山组）

The Wangshan Fm consists of three parts. Lower part is gray and light gray thin bedded dolomitic limestone, interbedded with calcareous shale, showing rib-like form after weathering. Middle part is gray and light gray medium- to thick-bedded dolomitic limestone with argillaceous banded limestone, locally with horizontal lamination bedding and polygonal structure. Upper part is gray and light gray thin- to medium-bedded limestone with chert nodules and banded and stromatolite reefs. The argillaceous component decreases upward as the dolomitic and siliceous components increase. The Wangshan Formation is 473-566 m thick.

Microplants: Favososphaeridium sp., Trachysphaeridium sp., Eomycetopsis sp., Myxococcoides sp.; stromatolites: Katauia placertula, Anabaria radialis, Linella cf. minuta, Jurusania f., Xuejiella Formosa, Baicalia f., Inzeria f., Minjiaria f.