摘要
本文报道的海相双壳类化石采自鄂尔多斯盆地西缘石炭纪海陆交互相含煤地层．经研究，双壳类有１３属，２７种，其中某些属种为我国首次发现，并建立了３个新种：Ｓａｎｇｕｉｎｏｌｉｔｅｓｎｉｎｇｘｉａｅｎｓｉｓ，Ｌｅｐｔｏｄｅｓｍａｓｈｉｋｏｎｇｅｎｓｉｓ和Ｓｔｒｅｂｌｏｃｈｏｎｄｒｉａｄａｓｈｉｔｏｕｊｉｎｇｏｕｅｎｓｉｓ本文采取将石炭系二分方案．研究区上石炭统下部（靖远组和羊虎沟组）海相双壳类特别丰富，有１０属２１种．这一双壳类组合与西欧和北美同期（纳缪尔一维斯发期；宾夕法尼亚的早期）的双壳类面貌相似，与国内山西太原同期的动物群差别很大，而与甘肃靖远和河南固始等地的动物群关系密切，这对恢复当时的古地理有重要意义．
This paper deals with the marine bivalves collected from the Carboniferous inDashitoujingou, Zhongning County, Ningxia Autonomous Region, and in Wuda town, Wuhai city, Inner Mongolia Autonomous Region. The bivalves contain 12 genera and 27species, including 3 new species as listed below: Sanguinolites ningxiaensis, Leptodesmashikongensis and Streblochondria dashitoujingouensis.The early Late Carboniferous (Namurian-Westphalian) bivalves are well-developed.This marine bivalve faunae includes 10 genera, among which Edmondia, Sanguinolites,Dunbarella, Posidoniella, Neocypricardinia, Astartella, Leptodesma etc. are more abundant.On the other hand, this bivalve assemblage is similar to that of West Europe and NorthAmerica of the same age. It is interesting that this bivalve faunae is rather different fromthat of Taiyuan, Shanxi of North China of the same age, but is very similar to that inJingyuan, Gansu and Gushi, Henan. There are a lot of common members between this faunae and that of the Shiqiantan Formation and the Qijiagou Formation in East SunggarNorth Tianshan. It shows that these areas of waters were connected with each other at thattime.
出处
《现代地质》
CAS
CSCD
1994年第4期403-412,T002,共11页
Geoscience
基金
国家自然科学基金
关键词
鄂尔多斯盆地
石炭纪
海相
双壳类
靖远组
地层
Ordos basin, Carboniferous, Weining Stage, marine bivalves, Jingyuan Formation
