The naming section of the Tuyiluoke Formation is located in the Tuyiluoke Village, about 50 km southeast of the Yingjisha County, Xinjiang. The Tuyiluoke Formation is obviously divided into two members. The lower member consists mainly of grey-yellow, grey-red conglomerate, interbedded with sandstones, about 10 m in thickness. And the upper member mainly of brownish-red argillaceous sandstones, about 10m in thickness, interbedded with gypsum and 3 beds of grey-greenish sandy-mudstones. The authors found dinoflagellates fossils in the 2nd bed of the grey-greenish sandy-mudstones.