石油与天然气地质 ›› 1984, Vol. 5 ›› Issue (1): 73-76.doi: 10.11743/ogg19840110

• 问题讨论 • 上一篇    下一篇

从介形类化石谈松辽盆地嫩江组的地质时代

张小筠, 宗建华   

  1. 华北石油地质局地质大队
  • 收稿日期:1982-11-08 出版日期:1984-03-25 发布日期:2012-01-16

ON THE AGE OF NENJIANG FORMATION IN SONGLIAO BASIN BASED ON OSTRACODA

Zhang Xiaoyun, Zhong Jianhua   

  1. Research Institute of Geology, Huabei Bureau of Petroleum Geology
  • Received:1982-11-08 Online:1984-03-25 Published:2012-01-16

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摘要：

松辽盆地白垩系嫩江组中除含丰富的介形类化石外,还含有丰富的叶肢介、瓣鳃类、腹足类、植物、轮藻、孢粉以及爬行动物、鱼化石等。因此,以某一门类化石为根据曾对其地质时代作过详细论述(表1)。多数研究者主张将该组归于晚白垩世,少数主张归于早白垩世,而介形类工作者,多数主张归于早白垩世。我们认为嫩江组的地质时代划为晚白垩世早期为宜,其理由为(表2):(1)含有一定数量的晚白垩世标志化石 Talicypridea=Cristocypridea。

Abstract:

It is appropriate to ascribing the Nenjiang Formation in Songliao Basin to the early Late Cretaceous time.The main evidence is that the Nenjiang Forma-tion contains Talicypridea,the typical fossil of the Late Cretaceous,which often coexisted with Dinosaur eggs typical also of the Late Cretaceous.Further-more,the Cypridea(Pseudocypridina)and the Cypridea cavernosa are quite com-mon in this formation.Apart from that,it contains some Cenozoic compo-nent such as Candona,Condoniella and Eucypris.The feature of Ostracoda are quite similar to those in the overlying Upper Cretaceous Sifanstai and Ming-shui Formations.