云南东部震旦系—寒武系边界层的遗迹化石和遗迹相

本文介绍了国际前寒武系-寒武系界线层型候选剖面所在地的滇东地区震旦系-寒武系边界层中新发现的遗迹化石娄型及新的化石层位,根据生物相和沉积相的综合分析将本区划分为3个沉积相区和Skolithos,Cruziaua,Cuziaua-Zoophycus 3个遗迹相带,最后讨论了遗迹化石在划分震旦系-寒武系界线上的意义。

TRACE FOSSILS AND ICHNOFACIES IN THE SINIAN-CAMBRIAN BOUNDARY. BEDS FROM EASTERN YUNNAN

New trace fossils types found in the more than 30 horizons and some new horizons in the Sinian-Cambrian boundary beds from the eastern Yunnan, the place of the Chinese candidate for global stratotype section and point for the Precam- brian-Cambrian boundary, are introduced in this paper. On the hasis of the comprehensive analysis of biofacies and sedi- mentary facies, this region can be divided into three depositional facies areas and following ichnofacies belts: Skolithos Cruziana and Cruziana-Zoophycus. The significance of using trace fossils for division of the Sinian-Cambrian boundary is al- so discussed.