摘要
在湖北秭归庙河灯影组白马沱段及水井沱组底部分别采获Sinotubulites及小壳化石,在宜昌莲沱长江两岸灯影组石板滩段下部发现遗迹化石Planolites。上述生物群的发现不仅极大地丰富了我国震旦系典型剖面的生物群内容,而且对研究地史早期生物演化具有一定意义。
The east Yangtze Gorges area of Hubei Province is the location where thetypical Sinian section of China is well developed. This paper mainly reports thata large amount of well preserved Sindubulites were collected from the base ofthe Baimatuo Member of the Dengying Formation along the Yangtze River atChanziya of Miaohe and that some small shelly fossils were also collected fromblack limestone at the base of the Shuijingtuo Formation, associated with Saballi-ditidae. Besides, a lot of well preserved Planolites have been collected from bothbanks of the Yangtze River at Liantuo. Sinotubulites, which was first found alongthe river at Natuo, was named ? Cloundina by Chen Meng'e in 1977, which was also renamed Sinolubulites by Chen Meng'e (Menge et al.,1981). After then, the samefossils were found by A. S. McMenamin from the pre-trilobites bed of La CienegaFormation in the northwest part of Sonora in Moxico. However, the discovery of somany Sinotubulites in the Miaohe area shows its vast geographic distribution. Smallshelly fossils in pre-trilobites strata in the Gorges area were reported from theeast and south flanks of the Huangling Anticline. The discovery of Sinotubulitesassociated with Sabelliditidae, on its two flanks is very similar to the feature inthe lower part of the Nemakit-Daldyn Bed in the north Siberlian Platform ofRussia. Planolites was only reported from the base of the Tienzhushan Member ofthe Dengying Formation before. Now, these fossils were found from the base of theShibantan Member, which occur in a lower bed. This fauna mentioned above notonly enriches the fauna of the Sinian System of China in biostratigraphy, but alsoshows an important siginficance in the study of faunal evolution in the early stageof geological history
出处
《地质论评》
CAS
CSCD
北大核心
1993年第2期118-123,T002,共7页
Geological Review
基金
国家自然科学基金
项目编号:4880079
关键词
震旦纪
灯影组
化石
遗迹化石
Sinian
Dengying Formation
tubular fossils
trace fossils
