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利用浊积岩相、相组合和组合序列分析方法，将西秦岭上三叠统浊积岩系划分为Ｂ、Ｃ、Ｄ、Ｅ、Ｇ等５个浊积岩相；水道、越岸沉积、舌状体－水道过渡带、舌状体、盆地平原等５个相组合；盆地平原→舌状体和盆地平原→舌状体→舌状体－水道过渡带→水道等２个组合序列。研究结果表明研究层段属海底扇沉积环境，并具有浊流搬运斜坡较陡，冲刷作用强烈；堆积地形平缓，为盆底扇；巳扇体规模较小，水道与舌状体相连等特征。基于上述分析，建立了海底扇的沉积模式。
The turbidite facies of the Upper Triassic in the West Qinling are divided into five turbidite facies such as B, C, D, E and G by using turbidite facies, facies assemblage and combined sequence analysis method. The watercourse, overbank sediments, Tongue body - waterway transition zone, Tongue body, basin plain and other five combinations; Basin plain → Tongue and basin plain → Tongue body → Tongue body - Waterway transitional zone → Waterway and other two combination sequences. The results show that the study interval is submerged fan sedimentary environment, and has a steep turbid current carrying ramp, strong erosion; the accumulation of terrain is flat, the basin fan; Patong small body, water and tongue connected. Based on the above analysis, the sedimentary pattern of submarine fan was established.