四川华鎣山一带的二叠系,黄汲清、曾鼎乾(1948)根据珊瑚和腕足类化石,将二叠系从下而上划分为:阎王沟系,栖霞石灰岩,茅口石灰岩(下部称五十三梯系,上部称倒钻岩石灰岩),龙潭煤系,长兴石灰岩。他们认为,中国西南部之大垄层在华鎣山不存在,下三叠统飞仙关系与长兴石灰岩之间,应有一间断。1965年,笔者与地质部第二普查勘探大 Permian, Huang Jiqing and Zeng Dingqian (1948), along the Huayingshan Mountains in Sichuan Province, are divided into two parts: the Yanwanggous, the Qixia limestone and the Maokou limestone Thirteen ladder, the upper part of the inverted drill rock limestone), Longtan coal, Changxing limestone. They think there should be a discontinuity between the large ridge layer in southwestern China and the Huaying Mountain in the Lower Triassic Feixiangian and Changxing limestone. In 1965, the author and the Department of Geology second census exploration