摘要
本文报道了在内蒙古赤峰市红花沟石头道村东山,原认为属太古宙的地层中所发现的多门类微体化石群。其大地构造位置在华北地台北缘内蒙地轴东部。化石群包括见于我国南方早寒武世梅树村阶的软舌螺类、似软舌螺类、棱管壳类、齿形壳类、开腔骨类、原牙形刺类、单板类、球形壳类、口盖化石等;也有本区特有的蠕虫管类及藻类化石,共计20属20种(其中2新属3新种,1相似种,10未定种)。证明该区原太古宇中的部分地层时代应属晚震旦世—早寒武世。
The Honghuagou area of Chifeng City is tectonically located on the northern margin of the Inner Mongolian axis. Microfossils were collected from siliceous marble at East Hill of Shitoudao Village, in the western part of the Honghuagou gold mine. Fossils described here include 12 groups, 20 genera (2 new) and 20 species (3 new, 1 cf. sp. and 10 sp. indet. ), such as Hy- olithids, Hyolithelmithes, Shiphogonuchitiida, Conodomorpha, Chanceloriida, Protoconodonta, Globomorpha, Monoplacophora, Operculum, Worm-tubes, and Algae. There are many mem-bers of the Meishucun fauna always developed in southern China and also elements of the Qinghezhen fauna. Among the above taxa, Protoclosterium lenis Tan (gen. et sp. nov. ) may be divided into three types of joining according to the characteristics of the apical end: (1) joining in the same direction; (2) dislocated joining in the same direction; and (3) joining in different di-rections. The siliceous marble bearing the microfossils which was originally assigned to the Archean may be considered to be of Late Sinian-Early Cambrian age.
出处
《地质论评》
CAS
CSCD
北大核心
1997年第1期33-44,T002,共13页
Geological Review
基金
国家黄金局1993年有偿资助项目
