摘要
西藏海相下第三系,广泛断续地出露于雅鲁藏布江断裂带南北。本文概略论述西藏海相下第三系,列举一些新的地层剖面,划分对比地层,简述沉积岩相古地理,提出双壳类化石组合特征并描述5个双壳类化石新种。它的研究对了解喜马拉雅地质历史的发展,海水退出该区的最后时限,以及探讨古地理、古气候等,都具有一定的理论与实际意义。
The Eogene system of marine facies outcrops widely but intermittently on both southern and northern sides of the Yarlung Zangbo River rift zone in Xizang (Tibet). The present paper gives a summary of the marine facies Eogene system in this region. Some new stratigraphic sections have been listed, with stratigraphic subdivision and correlation; a brief account also has been made on sedimentary lithofacies and palaeogeography. In addition, the characteristics of fossil bivalve assemblages are proposed, with description of five new species. Undoubtedly, the present study would be of great theoretical and practical significance in understanding the historical development of Himalayan geology and the last time limit in which the sea water withdrew from this region, and in the exploration of paleoclimatology and paleogeography.
出处
《古生物学报》
CAS
CSCD
北大核心
1992年第1期86-99,149-150,共14页
Acta Palaeontologica Sinica
关键词
西藏
海相
下第三系
双壳类
Xizang, marine facies, Eogene system, fossil bivalve.
