Wangjiajie Fm

The type section is located at Wangjiajie of Huangyu Town in Yongji County, Jilin. It was named by Li Dongjin et al. in 1966; Wang Mingzhou et al. formally quoted it in 1973; and Nan Runshan, Guo Shengzhe adopted it in 1992.

Siltstone, tuff. Lower member is composed of clayey siltstone, feldspathic sandstone intercalated with purple tuff, volcanic breccia and grayish-black limestone.

Limestone. Upper member is dominated by bioclastic limestone and dolomitic limestone intercalated with a few thin-bedded clayey limestone layers and chert nodules.

The total exposed thickness is 876.7 m.

The lower member yields coral Favosites cf. goldfussi, Thamnopora yangi, Syringopora schmidti major, Disphyllum sp.; stromatopora Dendrostella sp., Stachyodes berticulata etc.

The upper member yields stromatopora Actinostroma, Dendrostella wangjiajieensis; coral Sociophyllum semiseptatum, Pachyfavosites sp., Squameofavosites sp., Amphipora angusta, sp. etc.