Qiketai Fm
Type Locality and Naming
It was named by Xia Gongjun in 1956, and was first cited publicly by Si Xingjian, Zhou Zhiyan in 1962. The naming locality is situated at the Qiketai Platform southwest of Shanshan County, Xinjiang, with its reference section being located at the Subashi Gully in the central part of the Huoyan Mts.
Synonym: （七克台组）
Lithology and Thickness
Lower part represents grey-yellow and yellow-green quartz-arkoses. Upper part represents green mudstones and argillaceous shales, intercalated with siltstones and poststones, with the lower part of the formation containing 1-4 layers of shelly sandstones in the area from the Subashi Gully to the Gadatai Platform. It is 39-185 m in thickness.
Relationships and Distribution
Lower contact
It is in a conformable contact with the underlying Sanjianfang Fm
Upper contact
It is in a conformable contact with the overlying Qigu Fm
Regional extent
The formation is distributed in the Tulufan-Hami Basin, and is exposed in most cases in association with the Sanjianfang Fm in the form of a stripped belt.
GeoJSON
Fossils
It yields bivalve fossils such as Lamprotula (Eolamprotula) turfanensis, Cuneopsis tuyukensis, Cuneopsis cf., Ferganoconcha elongata, F. subcentralia, Pseudocardinia cf. jeniceiensis. P. turfanensis, P. ovalis, Sibireconcha anodontoides and Unio sp.; Gastropoda fossils such Bithynia sp., Valvata sp.; Ostracoda fossils as represented by Darwinula impudica, D. sarytirmenensis and Metacypris polymorpha; and Spinicadata fossils as represented by Sinokontikia yongi and S. szei, in addition to spore-pollen fossils.
Age
Depositional setting
Additional Information