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四川峨眉龙门洞下三迭统嘉陵江组地层经研究确定为潮坪——河口湾组合沉积环境下所形成。大量的沉积标志证明当时受潮汐作用及河流作用所控制。潮坪环境可进一步识别出潮间、潮渠及潮上海岸萨布哈沉积。岩性上表现为陆源碎屑沉积岩与碳酸盐岩相间互层。研究区位于四川峨眉山山脚,大地构造区划属康滇地轴的东侧,交通方便。国内外地质学家来此参观都一致认为,该区地层出露完好,沉积相标志极为丰富。下三迭统嘉陵江组地层层序如表1。
The formation of the Triassic Jialingjiang formation beneath the Longmen Cave in Emei, Sichuan Province has been determined to be formed under the sedimentary environment of the tidal flat-estuary. A large number of depositional signs proved to be under the control of tides and rivers. Tidal flat environment can further identify the intertidal, tide and tide on the coast of Sabuha deposition. Lithologically manifested as interbedded terrestrial clastic sedimentary rocks and carbonate rocks. The research area is located at the foot of Mount Emei in Sichuan Province. The zoning of the earth structure belongs to the east side of the axis of Kangdi-Dian. The transportation is convenient. Geologists at home and abroad came to this unanimously agreed that the strata exposed in this area intact, very rich sedimentary phase sign. The sequence of the Lower Triassic Jialingjiang Formation is shown in Table 1.