Xiaruya Fm
Type Locality and Naming
The type section lies on the highway from 2 km east of Niuyan Village of Sanglang to Yakou of Ruya, Wangmo County, Guizhou. It was named by Xiong Jianfei et al. in 1983.
Lithology and Thickness
Limestone and Claystone. Composed of gray-black and purple-gray moderately thick-bedded (limestone) intercalated with thin-bedded shales, sparite biocalcarenite, powder- to finely-crystalline dolomites, often with siliceous lumps and bands.
Relationships and Distribution
Lower contact
Conformable contact with the underlying Late Devonian Shidaihua Fm
Upper contact
Conformable contact with the overlying Shangruya Fm
Regional extent
Coeval with lower Lingun Fm of more shallow-water facies
GeoJSON
Fossils
Conodont faunas of the Siphonodella sulcata zone to S. cooperi zone.
Age
Depositional setting
It is interpreted as a platform margin slope facies
Additional Information