Changyanzi Fm
Type Locality and Naming
It was named and published by Jin Chuntai et al in 1989. The type section is located at the roadside from Longdanxi to Maliuqiao, east of Erlangshan Mts. in western Sichuan Province.
Synonym: (长岩子组)
Lithology and Thickness
The formation, 438 m thick, is dominated by grey and grey green thick-bedded mudstone and silty mudstone, locally with minor limestone lenses, calcareous nodules or medium-to-thin-bedded crystallized limestone.
Relationships and Distribution
Lower contact
It conformably rests onto the underlying Longdanyan Fm
Upper contact
It conformably rests below the overlying Baohuoyan Fm
Regional extent
The formation is distributed in the Erlangshan Mts. area in west Sichuan Province.
GeoJSON
Fossils
The fossils yielded include brachiopods, trilobites, conodonts, gastropods and bivalves. The fossil assemblages of brachiopod, trilobite and conodont are similar to those of the Longdanyan Fm.
Age
Depositional setting
Additional Information