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一、前言分布在贵州东部及邻区的铁丝坳组,大致相当于早震旦世古城期沉积,1978年以来,曾有“小冰”之称。王砚耕和马国干在创建本组时,认为是一种特殊的“冰海相”沉积(1981);后经我们近三年来的工作所见,大量事实与冰川成因不符。为促进这方面的研究,笔者在本文中主要讨论该组的相环境和成因问题。二、铁丝坳组的地层序列本文所涉及的范围是贵州省东部及其毗邻的四川东南隅和湖南西部。铁丝坳组分布较广,出露良好(图1)。限于以往研究程度较低,对其层序和横向延伸情况的认识尚存在问
I. Introduction Preface The distribution of the Tiexiao Formation in the eastern part of Guizhou and its neighboring area is roughly equivalent to the deposition of the ancient city of Early Sinnnance. Since 1978, there was “small ice”. Wang Yan-peng and Ma Guogang considered this a special “ice-sea facies” sedimentary deposit when they created this group (1981); after what we have seen in the last three years, a large number of facts did not correspond to the causes of glaciers. In order to promote this research, the author mainly discusses the group’s phase environment and causes in this paper. Second, stratigraphic sequence of Tiexiao Formation The scope of this article covers the eastern part of Guizhou Province and its adjacent southeast corner of Sichuan Province and western Hunan Province. Iron wire Au group wider distribution, good exposure (Figure 1). Limited to the relatively low level of research in the past, there is still some question about their understanding of the sequence and horizontal extension