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一、引言豫西(型)震旦系地层层布于河南省中西部和北中部、山西省南部中条山和王屋山区及陕西省洛南等地。由于各地区地层发育的差异及地质调查的先后不同和认识上的局限性等主客观原因,使豫西(型)震旦系地层出现三套(甚至更多的)命名系统。对这三套地层间的对比及与蓟县震旦系地层的对比,历来各说不一。略举近几年具代表性的几种认识做一比较(表1)。
I. INTRODUCTION The western Henan (type) Sinian strata are located in the central and western part of central and northern part of Henan Province, Zhongtiaoshan and Wangwu Mountainous Areas in the south of Shanxi Province, and Luonan in Shaanxi Province. Due to the differences of stratigraphic development in various areas and the subjective and objective reasons of geological surveys’ different and cognitive limitations, three (or more) naming systems appear in the western Sinian strata in western Henan. The contrast between the three strata and the contrast with the Jixian Sinian strata has always been different. To give some comparisons of several representative representations in recent years (Table 1).