Aladeyikesai Fm
Type Locality and Naming
The type section lies in the Aladeyikesai valley of Hala’alate Mt., Xinjiang. It was named by Yugan et al. in 1985, and formally adopted by the Earth Science Division of the Chinese Academy of Sciences, etc. in 1989.
Lithology and Thickness
Clayey sandstone and volcanics. The formation in the type section consists mainly of normal clastic sediments such as sandstone, siltstone, sandy mudstone and shale, and andesite, andesitic basalt and basalt, with limestone lenses. Thickness ranges 596−2048 m.
Relationships and Distribution
Lower contact
Faulted contact with the underlying Halaalate Fm.
Upper contact
Disconformable contact with the overlying volcanics of Permian Jiamuhe Fm.
Regional extent
Distributed only in Hala’alate Mt.
GeoJSON
Fossils
Fusulinids: Profusulinella parafittsi, P. trisulcata, Pseudostaffella sp., and Eostaffella sp.; Brachiopods Rotaia kusbasis, Cleiothyridina rossyi, Brachythyrina pinguisiformis, Neospirifer subsciger, Orulgania nawmovi, Balakhonia silimica, Echinoconchus fassiatus, Brachythyris panduriformis, Buxtonia scarbricula; Corals Zaphrentites sp., Bradyphyllum sp. and Cystodendropora xinjiangensis; Ammonoid: Syngastrioceras mirabilis; Bivalves: Vilkingia sp. and Posidoniella sp. as well as gastropods, radiolarians, etc.
Age
Depositional setting
It is interpreted as marine clastics intercalated with submarine eruptive sediments.
Additional Information