Duoquanshan Fm
Type Locality and Naming
The type section is at Oulongbulak southeast of Da Qaidam Dachaidan, Qinghai. The Duoquanshan Fm is derived from the Duoquanshan Limestone proposed by Mu Enzhi et al. in 1958. The Duoquanshan Limestone had previously been referred to the Arenigian carbonate rock developed in Oulongbuluke. Zhang Wentang (1962) renamed it the Duoquanshan Fm
Synonym: (多泉山组）
Lithology and Thickness
The formation is represented by a Lower part of thick-bedded limestone, and an Upper part of thin-bedded limestone intercalated with pebbly limestone, calcareous shale. In the type area, the Duoquanshan Fm is 950 m thick.
Relationships and Distribution
Lower contact
It rests conformably on the dolomite intercalated with limestone at the top of the Oulongbuluke Gr of Upper Cambrian
Upper contact
It is conformably overlain by the black shale at the base of the Shihuigou Fm
Regional extent
The Duoquanshan Fm is exposed at Shihuigou in Wulan County, Qinghai (400 m thick), Datouyanggou south of Dakengdaban (195 m thick incompletely) and Oulongbulak Hill and its eastern part (800-1000 m thick).
GeoJSON
Fossils
Age
Depositional setting
Additional Information