一、前言云南中东部是我国震旦紀地层发育良好地区之一。1938年,熊秉信最先报导昆明附近的震旦系。随后地貭工作者陆續发表有关文章,对本区震旦紀地层的划分提出了意見,并为以后的地貭工作所引用。解放以后,通过一系列地貭矿产普查工作,在地层方面获得不少新知識。1960年,笔者前去云南中东部的一些震旦系出露較好的地区,进行了剖面实测工作(图1)。其后把 I. Foreword Yunnan’s eastern region is one of the well-developed Sinian strata in China. In 1938, Xiong Bingxin first reported the Sinian near Kunming. Afterwards, the workers published some articles in succession and put forward their opinions on the division of the Sinian strata in this area and cited them for future land requisition work. After liberation, through a series of 貭 mineral census work, get a lot of new knowledge in the strata. In 1960, the author went to a number of areas where the Sinian in Yunnan’s central and eastern regions exposed better and conducted field surveys (Figure 1). Then put it