摘要
本文记述了近两年我们在豫西长城系云梦山组、白草坪组、北大尖组、崔庄组及三教堂组中发现的大量遗迹化石。它们大部分为平行岩层面的潜穴(现均已被石英砂充填),个体较大,形态复杂,表面多光滑无饰,有些具横向环节。造迹生物很可能以蠕虫类为主。伴生的沉积构造主要为浪成波痕。据前人研究,产化石地层相当于蓟县地区长城系,时代在1400Ma以前。豫西长城系遗迹化石的发现,对研究地球上后生动物的起源与早期演化、对丰富遗迹学的内容以及对我国北方晚前寒武系的划分、对比及沉积环境的确定等,都具有重要意义。
An abundance of metazoan trace fossils were recently discovered in the western part of Henan from the Early Proterozoic Changcheng System ranging from 1800 Ma to 1 400 Ma in age. The fossil-bearing formations of the system include the Yunmengshan, Baicaoping, Beidajian, Cuizhuang and Sanjiaotang Formations. The discovery is of great significance for the correlation of the Late precambrian strata of northern China and the further understandiog of life evolution, especially for the study of the origin and early evolution of metazoans on the earth Eleven genera, 15 species and 1 uncertain species are described in detail, and among them are 3 new genera and 13 new species.The new genera and species are Lushanichnus ichnogen, nov., L. beiziensis ichnogen, et ichnosp, nov., Thallusichnus iohnogen, nov., T. ruyangensis ichnogen, et ichnosp, nov., Helicolithus yiyangensis ichnosp, nov., Gordia lushanensis ichnosp. nov., G. gyratus ichnosp, nov., Urohelminthoida ruyangensis ichnosp, nov., Yunmengshanichnus ichnogen, nov., Y. ruyangensis ichnogen, et ichnosp. nov., Paleodictyon fasciiformis ichnosp, nov., Squamodictyon ruyangensis ichnosp, nov., Protopaleodictyon aduncatus ichnosp, nov., Protopaleodictyon fasciiformis ichnosp, nov., Annulatusichnus ichnogen, nov., A. ruyangensis ichnogen, et ichnosp, nov. and A. hamatus ichnogen et ichnosp, nov..Most of the trace fossils are burrows Parallel to the bedding planes, which are generally complex in shape with smooth surfaces. Some of the fossils have regular body annulations. It is very likely that the trace-making organisms are mainly worm-like animals.
出处
《地质论评》
CAS
CSCD
北大核心
1991年第5期437-444,T002,共9页
Geological Review
