摘要
黔东北印江合水和石阡乌谷溪的小溪组中发育良好的遗迹化石,经鉴定共计有5个属的遗迹化石:Palaeophycus isp.,Rusophycus isp.,Planolites isp.,Gordia isp.和Phycodes isp..根据遗迹化石的组合特征,该组合属于Cruziana遗迹相.结合2个剖面的沉积构造和砂岩粒度分析结果,认为小溪组的沉积环境为相对安静的平均低潮线以下的临滨带.
Abstract
The Xiaoxi Formation is well developed in two sections (Heishui,Yinjiang and Wuguxi,Shiqian),NE of Guizhou,China.This formation is composed of the sandstones,siltstones and mudstones,and preserved with the depostional structures and trace fossils.This paper focuses on the study of the sedimentary environment of the Xiaoxi Formation based on the materials from these sections.Five ichospecies are identified from two sections,including Palaeophycus isp.,Rusophycus isp.,Planolites isp.,Gordia isp.and Phycodes isp.These trace fossils belong to the Cruziana ichofacies,Based on the depositonal structures,the ichofaces and the result of particle size analysis,the sedimentary environment of the Xiaoxi Formation of Silurian in NE of Guizhou is nearshore zone with a relativealy and stable environment under the average low tide line.
NETL
NSTL
维普
万方数据