Pliocene micromammalian biostratigraphy of nihewan basin , with comments on the stratigraphic division 泥河湾盆地上新世小哺乳动物生物地层学及相关问题讨论
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Mammalian biostratigraphy of tianyuan cave , compared with that of upper cave at zhoukoudian choukoutien 周口店田园洞古人类化石点地层学研究及与山顶洞的对比
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Mei shi - long , 1991 . middle and late cambrian conodont and trilobite biostratigraphy in wanxian , hebei . unpublished ph . d thesis of peking university 武桂春, 2003 .鲁西地区晚寒武世牙形石.北京大学博士研究生学位论文
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From these characteristics of biostratigraphy , lithostratigraphy and chronostratigraphy , the oil shales in shuanghu area are similar to those in early toarcian europe 从生物地层、岩石地层、年代地层来看,双湖地区的油页岩与欧洲早toarcian期广泛分布的黑色页岩有很好的可对比性。
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Ch . 2 biostratigraphy features , distribution and assemblage of three group fossils from many of the 7 geological setions , including conodont , coral and foraminifera fossils , have been comprehensively discussed . and a series of fossil assemblages can be recognized 生物地层研究综合各剖面上获得的古生物资料,按牙形刺、珊瑚和有孔虫化石等三大类论述了它们的特征、分布和组合特点,进而在鲁班石地区划分建立了牙形刺生物化石组合带。
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The main fruits of study are as follows : ( 1 ) a complete stratigraphic framework of middle - upper jurassic series is set up through systematic stratigraphic study of middle - upper jurassic by the analysis of lithostratigraphy , biostratigraphy and chronostratigraphy on five groups of middle - upper jurassic series in the studied area 主要成果表现在以下五个方面: ( 1 )通过对研究区中?上侏罗统五个组进行岩石地层、生物地层和年代地层分析,系统进行中?上侏罗统地层学研究,建立了研究区中?上侏罗统完整的地层格架。
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On the basis of extensive field investigations and laboratory analyses on the carboniferous strata and fossils in the west qinling . to the carboniferous of lixian , there has systematically been studied in the lithostratigraphy and biostratigraphy . at the same time , a diverse of fossils form this area have detailedly been described and discussed 在对西秦岭石炭纪地层和古生物化石资料进行广泛的野外收集和室内分析处理的基础上,对研究区石炭系进行了系统的岩石地层和生物地层学的划分和对比;对所获古生物化石进行了系统的描述和归属讨论,形成了一套内容丰富的西秦岭石炭纪地层古生物研究新资料。
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This study is a post - cruise study of this leg , calcareous nannofossil samples from sites 1146 , 1147 and 1148 of leg 184 were analyzed to provide a high - resolution biostratigraphy for this leg and to investigate morphological variation of coccolith genus gephyrocapsa . the main results of this study are : 1 . 12 late pliocene to pleistocene bio - events were recognized and 6 zones of martini ( 1971 ) were determined for the upper sediment sequences of sites 1146 and 1148 本文作为大洋钻探项目船下后续研究的一部分,对184航次中的1146站位和1147 、 1148站位的样品进行了分析和研究,在船上科学家已经建立起的地层框架的基础上进一步加密采样,对生物事件标志化石类别进行数量统计,进一步确定了12个生物事件在钻孔中的深度,建立起了两个站位的高分辨率的钙质超微化石生物地层框架。
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Based on the elaborate research on the stable oxygen isotope stratigraphy , carbonate stratigraphy , biostratigraphy , magnetic susceptibility , grain size and clay mineral of cores marked md81349 , md77190 , md77181 and bar9427 in the northeastern indian ocean , this thesis focus on the application of the tl properties in the above cores to infer the paleoclimatic change , and discuss the response of tl of sedimentary records with climatic cycles during the last 300 , 000 years 论文对东北印度洋地区不同地理位置的md81349 、 md77190 、 md77181 、 bar9427四支岩芯的全岩热释光和md81349岩芯纯净有孔虫的热释光测量,与已知氧同位素地层资料对比后发现四支岩芯的热释光变化与氧同位素地层揭示的气候变化及可能的隆升事件有良好的对应关系。