【摘要】 <正> 赫章的奥陶系零星分布于郎家冲、杉树林等地。杉树林剖面是贵州奥陶系出露最西边的一个剖面。赫章的奥陶系仅残留下统湄潭组灰绿、紫红、黄绿色的砂岩页岩,产笔石:Didymograptus,三叶虫:Taihungshania等。笔者等在杉树林朗家冲附近的长冲两剖面的野外工作中,采集了Skolithos等遗迹化石标本,认为这些遗迹化石的发现对该区早奥陶世湄潭期沉积环境的研究很有意义。文内共计描述遗迹化石6种,分属于5个遗迹属。本文描述的遗迹化石为笔者与沈建伟、梅朝勇两同志共同采集。在本文写作的过程中,得到陈文一、颜承锡两位老师的指导和帮助,颜承锡帮助鉴定了部分遗迹化石;梅朝勇同志提供了岩石薄片的粒度分析资料;贵州地矿局113地质大队陈宗义总工程师,刘功欧、曾鼎更多还原

【Abstract】 Through the studying of the trace fossils in the section of the lower Ordovi-cian Meitan Formation in Shashulin and Changchong in Hezhang county of Guizhou, this paper suggests that the trace fossils in purplish red quartzsands-tone on the upper Meitan Formation in this region were skolithos ichnofacies, which reflect that the shore area was once a high-energy environment with surging waves.In the ichnofacies were mainly skolithos,diploceraterion and thalassi-noides, etc., the research reseults of which are almost the same with those of the skolithos both at home and abroal.These trace fossils provide an important evidence for analysing and studying the sedimentary environment of the early Ordovician Mietanperiod in this region.This paper also systematically describes the major kinds of the frace fossil associations.更多还原