摘要
大面积分布于江西北部地区的下震旦系莲沱组是一套厚度较大的碎屑岩系。长期以来，其地质时代，一直是通过区域构造对比确定的，虽无大的争议，但缺少直接化石依据。近年，作者等人￣＊通过１：５万区调，于该组采获大量藻类化石，如Ｌｅｉｏｐｏｓｐｈｏｐｈａｅｒａ、Ｌｏｐｈｏ－ｓｐｈａｅｎｄｉｕｍ等等，从而结束了该地区莲沱组无化石对比的历史。为其时代的进一步确定提供了新的研究资料，并通过区域对比分析，探讨了该地区莲沱组藻类化石的发展、演化规律及组合特征。
Liantuo formation of early Sinian distributed in large scale in NorthJiangxi is a suit of thicker detrital rock series. For a long term,its geological age has been determined by correlation of reginal stru-cture. Although there is no big dispute,the basis of fossil is absent.In recent years,a great number of algal fossil such as Leioposphosphae-ra, Lophosphaeidium,etc have been collected by the author in this forma-tion through 1: 50,000 regional survey, thus ending the history without fossilin Liantuo formation in this area. Therefore,new data has been providedfor further determination of its age. Nevertheless, development, evolutionregulation and composite features of this algal fossil in the formation havebeen discussed by analysis of regional correlation。
出处
《江西地质》
1995年第4期274-278,共5页
Jiangxi Geology
