湖南益阳南坝的笔石地层序列兼论特马道克阶的再分

The Nanba section of Yiyang City, Hunan Province preserves one of the most complete and continuous Tremadocian sections not only in China but also in the world, and thus is an ideal candidate for solving the problem of further subdivision of this stage. This proposed project will study this section and focus on the taxonomy, phylogeny, and biozones of graptolites. A complete graptolite-based stratigraphic sequence will be established, and new suggestions on subdivision of the Tremadocian Stage will be provided.

湖南益阳南坝剖面是我国目前已知的地层最为完整、连续的剖面，也是国际上最为完整、连续的特马道克阶剖面之一，是解决“特马道克阶”的阶内划分最理想的候选剖面之一。本申请项目选择湖南益阳南坝剖面作为研究区，在已有的研究基础上，重点对笔石的系统分类、分支演化和笔石分带进行研究，目的是在笔石的准确鉴定和分支演化研究的基础上，建立完善的笔石地层序列，并依此提出特马道克阶再分的建设性建议。