本文根据我组十多年来积累的资料,结合一些兄弟单位的研究成果,将四川盆地上三迭统自下而上划分为:一.马鞍塘组主要分布于盆地西北部龙门山前江油至什邡的狭长地带中。时代为卡尼期。二.垮洪洞组我们将发育于峨眉、乐山一带的“海燕蛤”层与盆地西北部江油、什邡一带含“混生化石”的“马鞍塘上组”相对比,统称垮洪洞组。时代卡尼—诺利期。 Based on the data accumulated by our group over the past decade and combined with the research results of some fraternal units, the paper divides the Upper Triassic in the Sichuan Basin from bottom to top into: 1. The Ma’antang Formation is mainly distributed in the front of the Longmenshan River in the northwestern part of the basin In the narrow strip The era of Carnies. 2. Weirong cave group We will develop in the “Emei, Leshan area ” Haiyan clam “layer and the basin of northwest Jiangyou, Shifang area containing ” mixed saddle " Flood cave group. The era of Carney - Noli period.