Beiketan Fm
Type Locality and Naming
SE Tarim Basin. The Beiketan Fm was named by Feng Mingdao et al. in 1981. The type section is in Hongliuquan gully of Altun Mountains, Ruoqiang County, Xinjiang Weiwuerzhu Zizhiqu (Xinjiang Uygur Autonomous Region). It is the uppermost formation in Baxkorgan Gr.
Synonym: (贝克滩组)
Lithology and Thickness
The Beiketan Fm is the upper formational level unit of the Baxkorgan Gr. It consists of clastic-carbonate rock association, dominated by grey, dark-grey limestone, siliceous limestone, chert, inequigranular sandstone and siltstone. Lower part is dominated by limestone. Middle part consists of coarse sandstone and chert, intercalated with limestone and carbonaceous siltstone. Upper part is grey-green, purple red fine-grained sandstone. It is 468 m thick.
Relationships and Distribution
Lower contact
It is in conformable contact with underlying Hongliuquan Fm.
Upper contact
It is in unconformable contact with Muzisayi Fm (lower formation of Taxidahan Gr)
Regional extent
SE Tarim Basin. The formation is distributed at Hongliuquan gully-Beiketan area, Ruoqiang County at North Slope of Altun Mountais, Xinjiang.
GeoJSON
Fossils
The limestone yields stromatolite: Kussiella f..
Age
Depositional setting
Additional Information