推荐一条GSSP的辅助剖面

Recommend Ation on a Reference Section of GSSP

该文赞同以Ｈｉｎｄｅｏｄｕｓｐａｒｖｕｓ的首次出现作为划分二叠－三叠系界线的生物标志．笔者强调只有以正模及其描述为准所厘订的Ｈ．ｐａｒｖｕｓ，且以主齿、细齿均保存完美、距界线粘土层顶面位置最低以及其顶面至界线生物面之上均为单一岩相的Ｈ．ｐａｒｖｕｓ的首次出现点位，才有可能成为二叠－三叠系全球界线层型剖面点的位置．东岭剖面可以它典型的Ｈ．ｐａｒｖｕｓ距界线粘土层顶面仅高出１３ｃｍ，化石保存完好以及界线粘土层至Ｐ／Ｔ界线附近均为单一的灰泥岩三特点弥补煤山剖面之不足．为使作为二叠－三叠系全球界线层型剖面点（ＧＳＳＰ）的候选剖面的浙江长兴煤山剖面更臻完善。

The first appearance of Hindeodus parvus as bio marker of P/T boundary are agreed on in the paper.Author stressed that the point position of GSSP must accord with the holotype and revisal description of Hindeodus parvus (Kozur and Pjatakova,1976,fig. 1b) as a standard,intact cusp and denticles,and the first point position ,beingfrom top surface of Boundary Clay Bed,and in the monofacies.The Dongling section can complement reptenished some deficiency of the Meishan section from its three features:typical Hindeodus parvus ;only 13 cm highter over the top surface of Boundary Clay Bed,and single lime mudstone from Boundary Clay Bed to strata nearly P/T boundary.In order to make the Meishan section at Changxing even more perfect,the Dongling section is recommended as a reference section of Meishan section