Luoquanwan Fm
Type Locality and Naming
It was named by Jin Chuntai et al. (1989). The type section is at Luoquanwan in southern area of Erlangshan Mt. area in west Sichuan Province.
Synonym: (罗圈湾组) , Luochuanwan Fm
Lithology and Thickness
The formation, 318 m thick, consists of dark gray to gray black thick-bedded silty mudstone, mudstone and argillaceous siltstone.
Relationships and Distribution
Lower contact
It rests conformably onto the underlying Yuanyangyan Fm
Upper contact
It rests conformably below the overlying Longdanyan Fm
Regional extent
It is steady in lithology. It is about 500 m in thickness in the area north to the type section. The exposures are confined in southern slope of Erlangshan Mt.
GeoJSON
Fossils
It bears fossils of graptolites Petalolithus clavatus, Diversograptus sichuanensis, Streptograptus runcinatus, etc. and brachiopods Borealis, Eospirifer, Striispirifer, Nucleospira, etc.
Age
Depositional setting
Additional Information