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西藏冈底斯西部噶尔县狮泉河一带的昂杰组和下拉组属冈底斯地层分区申扎小区,在昂杰组中发现了牙形刺,依据牙形刺可以确定,昂杰组的地质时代是早二叠世晚期到中二叠世.下拉组的地质时代可能为中二叠世,是否存在晚二叠世的海相地层,尚需进一步研究,但下拉组下部可能与昂杰组的上部有些重叠.重要的是在昂杰组发现了典型的冈瓦纳大陆边缘的冷水相牙形刺分子Vjalovognathus sp.nov.x,这是中国二叠纪冈瓦纳冷水相牙形刺动物群的正式报道和描述.
The Anjie Formation and the pull-down formation along the Shiquanhe area in the western Gytsidges, Tibet, belong to the Shanzha community in the Gangdise Formation. In the Anjie Formation, conodonts were found. According to the conodont, the Anjie Formation Of the geologic age from the Early Early Permian to the Middle Permian.The geologic age of the pull-down group may be Middle Permian, and the existence of Late Permian marine strata needs further study, but the lower part of the pull-down group may be associated with Ang There is some overlap in the upper part of the Jie Formation, and it is important to find in the Angjie Formation a typical cold-water phase conodont element Vjalovognathus sp.nov.x on the margins of the Gondwanaland continental margin, The official report and description of the thorn fauna.