一、前言关于滇西的寒武纪地层,最早孙云铸(1939)报道,在保山蒲缥孔雀寺棕黄色页岩中采到晚寒武世凤山期三叶虫:Agnostus cyclopyge Tullberg,Saukia acamus(Walcott),S.grabaui Sun,Quadraticephalus yunnanensis Sun,Tsinania sp.,Xenostegium sp.等。肯定了滇西保山一带有晚寒武世地层的存生,并将此段地层命名为保山页岩。黄缓堂1939年在施甸附近陶然村三棵树,于黄色云母质页岩与石灰岩夹层的岩层中发现三叶 I. Preface About the Cambrian stratigraphy in Western Yunnan, the earliest Sunvian (1939) reported that during the late Cambrian Fengshan period Trilobite was collected in the Paleo-shan Peacock Temple in Baoshan, Baoshan, China: Agnostus cyclopyge Tullberg, Saukia acamus (Walcott) , S. grabaui Sun, Quadraticephalus yunnanensis Sun, Tsinania sp., Xenostegium sp. And the like. Affirmed the survival of Late Cambrian strata in Baoshan, western Yunnan, and named this section Baoshan shale. Huang Xiaotang 1939 in Shidian near Tao Village three trees, yellow mica shale and limestone interlayer rock found in the three-leaf