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1 DISCOVERY OF THE LATEST CRETACEOUS PLANKTONIC FORAMINIFERA FROM GYIRONG OF SOUTHERN TIBET AND ITS CHRONOSTRATIGRAPHIC SIGNIFICANCE

WAN Xiao Qiao ) , DING Lin ) ) China University of Geosciences , Beijing ) Institute of Geology , Geophysics , the Chinese Academy of Sciences , Beijing

2002(1):89-95. DOI: 1

[Abstract](418) [HTML](0) [PDF 0.00 Byte](6) [Cited by](22)

Abstract:
西藏吉隆县宗卓组顶部发现了丰富的浮游有孔虫动物群，其时代为晚白垩世马斯特里赫特期G.gansseri带的上部至A.mayaroensis带的下部，年龄值在68-70Ma之间。据江孜至吉隆一带地层和古生物学的研究与对比，认为特提斯-喜马拉雅北亚带的半深水至远洋环境是在康潘晚期至白垩纪末期由东向西逐步结束的，在吉隆地区的结束时间至少已接近白垩纪和第三纪的界线时期。

2 SOME LOWER CARBONIFEROUS STRAIGHT NAUTILOIDS FROM HUNAN AND KANSU

LAI CHAI-GEEN

1964(2):334-339. DOI: 10.19800/j.cnki.aps.1964.02.016

[Abstract](132) [HTML](0) [PDF 922.04 K](572) [Cited by](20)

Abstract:
The straight nautiloids are not abundant in the Lower Carboniferous strata of China.The works of studing and collecting have been greatly neglected.Recently,a few speci-mens were collected by Messrs.H.Liu and Y.T.Lin.Among them Mr.Liu describedtwo species from Hunan.In this paper the following species(comprising a full re-description of Liu’s species)are described:Rayonnoceras hunanense(Liu)Rayonnoceras sp.Dolorthoceras guijangense Lai(sp.nov.)Euloxoceras orientale Lai(sp.nov.)Michelinoceras sp.

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