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放射虫化石     
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  radiolaria fossils
     Radiolaria Fossils in Cores A-24C and A-50C and Sedimentary Environment in the Area East of Taiwan Island
     台湾岛以东A-24C及A-50C岩芯中的放射虫化石与沉积环境
短句来源
     FIRST DISCOVERY OF MIDDLE SILURIAN RADIOLARIA FOSSILS IN XINJIANG
     新疆首次发现中志留世放射虫化石
短句来源
     3. The abundance and diversity of radiolaria fossils are high in the clay of basin.
     3.海盆区粘土沉积物中的放射虫化石丰度高且分异度高。
短句来源
     The distribution characteristics of radiolaria fossils in the surface sediments is as follows: 1. From the shelf of shallow water to the upper area of continental slope, there are a few radiolaria fossils and monotonous genus and species.
     表层沉积物中放射虫的分布特点为 :1 .浅水陆架 -陆坡上部区的粉砂、细砂沉积物中放射虫化石数量少且属种单调。
短句来源
     Based on the analysis of Radiolaria fossils , in association with the comprehensive data of Foraminifera , sporopollen , plant opal , etc, and the measuring results of AMS 14C and magnetostratigraphy , the paleooceanographic character and change regularity of paleoclimate at the Okinawa Trough in the East China Sea since Quaternary period were roughly studied .
     本文根据对冲绳海槽96、155号岩心中的放射虫化石分析,结合有孔虫、孢粉、植物硅酸体等综合研究资料及AMS14C测年、磁性地层学的测试结果,粗略地探讨了冲绳海槽晚第四纪以来的古海洋学特点及东海大陆架古气候变化的规律。
短句来源
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  radiolarian
     The radiolarian fauna described in this paper was collected from the Caijiawa marble (correlation with the Yianlinggou Fortnation in Qinling Group) in Tongbai region of Henan Provinoe, and includes 8 species (3 uncertain and 2 new species), 7 genera ( 1 new genus) which are Archaeospongopmnum compactum Nakaseko et Ni shimura, Yangia chinensis Feng, Shengia yini (Feng), Cenosphaera sp., Triassocampe?
     本文描述了采自河南南部桐柏地区蔡家凹大理岩中的放射虫化石,共计7属8种(其中1新属2新种), 包括 Archaeospongoprunum compactum Nakaseko et Nishimura, Yangia chinensis Feng,Shengia yini (Feng), Cenosphaera sp., Triassocampe ?
短句来源
     hughesi and Stichocorys delmontensis, etc, we establish respectivelythree radiolarian fossi1 zones of the Late Miocene in the southern South China Sea,inclu-ding RN6,RN7 and RN8, and discuss their stratlgraphic age.
     hughesi和Stichocorys delmontensis等的分布特征,分别建立了南海南部晚中新世的 RN6,RN7和RN8等3个放射虫化石带,并讨论了其地层年龄。
短句来源
     DISCOVERING FOSSILS ON THE LATE PALEOZOIC RADIOLARIAN IN NORTHEAST JIANGXI PROVINCE
     赣东北晚古生代放射虫化石综述
短句来源
     Microfossils,including spores,pollen and radiolarian,were found in the Mesozoic which was first encountered in Well MZ-1-1 in the north of the South China Sea.
     MZ-1-1钻井首次在南海北部珠江口盆地揭示了中生界,获得了可确定地层时代和沉积环境的孢粉和放射虫化石
短句来源
     During the decade geologists have much studied on the radiolarian stratigraphy, and a Helenifore laticlavium fauna for Frasnian Stage, a Holoecisicus foremanae fauna for Famennian Stage was determined by Wang et al. (Wang et al., 2000, 2003). Wu et al.
     近10年来,我国的生物地层学家做了大量的放射虫地层研究,先后建立了弗拉斯阶的Helenifore laticlavium动物群和法门阶的Holoecisicus foremanae动物群(王玉净等,2000;Wang et al, 2003, )同时还报道了下石炭统的放射虫化石带(吴浩若等,1994;冯庆来等,1997)。
短句来源
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  radiolarian fossils
     Discovery of Middle Triassic radiolarian fossils in cherts in the vicinity of the Tubei Lake,northern Nyima,Tibet,China
     西藏尼玛北部图北湖一带硅质岩中发现中三叠世放射虫化石
短句来源
     The radiolarian fossils of Late Paleozoic were discovered by the authors for the first time in 1993 and 1996 from the ophiolitic melange in northeast Jiangxi Province,which has been taken as the Shuangqiaoshan Group of Middle Proterozoic and as the Zhitang Formation of Lower Sinian Series.
     首次在赣东北蛇绿混杂岩带分布的弋阳县及德兴市境内被前人定为中元古界双桥山群与下震旦统志棠组中发现了一批晚古生代放射虫化石
短句来源
     Studies of the contact relationships of the Chert Member of the Amugang Group with its overly-ing and underlying strata and fossils discovered in limestone pebbles and limestone intercalations ,as well as comparative study of the data of radiolarian fossils in cherts at Caimarco and Rongma indicate that the Chert Member is not the crystalline basement but Triassic in age and can be correlated with the Late Triassic Gyiza Group.
     对阿木岗群硅质岩段与上覆和下伏地层的接触关系,灰岩砾石、灰岩夹层中所发现的生物化石及才玛尔错和绒马硅质岩中放射虫化石资料的对比研究表明,硅质岩段不属于基底地层,其时代相当于三叠纪,大致可与晚三叠世结扎群相对比。
短句来源
     Late Devonian-Early Carboniferous Radiolarian Fossils from Siliceous Rocks of the Kelameili Ophiolite, Xinjiang
     新疆卡拉麦里蛇绿岩带中硅质岩的放射虫化石
短句来源
     Some radiolarian fossils were discovered two times in the carbonaceous silicalites, the major gold-bearing rocks in the Changkeng gold-silver deposit.
     在广东长坑金银矿床的主要含金岩石碳质硅质岩中两次找到放射虫化石,其时代可能属于早石炭世。
短句来源
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  radiolarian fossil
     Classification of Radiolarian Fossil Zones and Environmental Analysis of Gufeng Formation in Lower Yangtze Region
     下扬子区孤峰组放射虫化石带划分及环境分析
短句来源

 

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      radiolarian
    It was observed that the primary productivity increased with the enhanced abundance of algae and photosynthetic bacteria, and with the decrease in both the radiolarian individuals and the body size of brachiopods during the faunal mass extinction.
          
    An attempt to quantitatively reconstruct the paleo-primary productivity by counting the radiolarian fossils in cherts from the l
          
    The proportion of all radiolarian groups in the total zooplankton biomass was shown to range from 1.4 to 11.5%.
          
    The silicites are represented by radiolarian and spicule-radiolarian cherts alternating with clayey cherts.
          
    New methods of investigation are applied to the inner structure of Cretaceous spherical radiolarian skeletons, which reveal numerous taxa with an eccentric microsphere.
          
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      radiolarian fossils
    An attempt to quantitatively reconstruct the paleo-primary productivity by counting the radiolarian fossils in cherts from the l
          
      radiolarian fossil
    Miocene radiolarian fossil assemblage from the southern Tojama Prefecture in Japan.
          


    Many well-preserved radiolarians etched from limestones of the Shui-jingtuo Formation( Lower part of lover Cambrian) of Zhenba County, Shaan xi Province are reported in this paper. The microprobc readings obtained from radiolarian shells show that they are mainly composed of silicon dioxide? however, they are morphologically similar to the Conchariidae (belonging to the Order Phaeodaria) whose shells are poorly silicified and hardly fossilized. These oldest known radiolarians probably lived as benthos and not...

    Many well-preserved radiolarians etched from limestones of the Shui-jingtuo Formation( Lower part of lover Cambrian) of Zhenba County, Shaan xi Province are reported in this paper. The microprobc readings obtained from radiolarian shells show that they are mainly composed of silicon dioxide? however, they are morphologically similar to the Conchariidae (belonging to the Order Phaeodaria) whose shells are poorly silicified and hardly fossilized. These oldest known radiolarians probably lived as benthos and not like their extant descendants which are planktonic. All the specimens collected from eleven different layers of the Shuijingtuo Formation are grouped into a new family, three ne\v genera and seven ncu species, which are briefly described below.

    用酸蚀法从陕西镇巴县小洋剖面下寒武统水井沱组分离出大量保存精美的双瓣壳格子状化石,经电子探针进行成分分析和扫描电镜下进行形态学研究,确认为迄今已知最古老的放射虫化石。这些最早出现的放射虫不同于泡沫虫类,而出入意外地是一类褐色虫(Phaeodoria)。基于这些材料,建立了1个新科(Eoconchariidae)、3个新属(Eoconcharium、Fusuconohnrium和Quadratapora)和7个新种。

    Eight cores from the middle East China Sea were studied for Radiolaria. Maily besed on the Radiolaria, together with other microfossils and 14C dating, some conclusions about palaeoenvironment and paleo-oceanography of the middle East China Sea since 30000 years have been made:

    本文对东海中部8个柱样中的放射虫化石进行了研究,对东海三万年以来的古环境和古海洋学问题认识如下:冲绳海槽中放射虫的数量远比陆架丰富;陆架中部海水可能由北向南退出,外陆架的海水是由西北向东南退出;距今一万五千年左右海平面最低位置约在现在水深的107—134m间;初步确定海槽全新世与更新世的界线约在40cm处.

    Dengqen is situated in the eastern part of the Bangong Co-Dengqen-Nujiang ophiolite belt; Radiolaria of the Pliensbachian age recently have been discovered from the Zhongbai village therein. The radiolarian sample XD1-1 was collected at the ophiolite section of the Zhongbai village in June,1981 by Chang Chengfa, leader of the Joint Xizang Geotraverse Expedition of the Chinese Academy of Sciences and the Royal Society of London, 1968. This section is overlain by Cretaceous shale with siliceous bands and underlain...

    Dengqen is situated in the eastern part of the Bangong Co-Dengqen-Nujiang ophiolite belt; Radiolaria of the Pliensbachian age recently have been discovered from the Zhongbai village therein. The radiolarian sample XD1-1 was collected at the ophiolite section of the Zhongbai village in June,1981 by Chang Chengfa, leader of the Joint Xizang Geotraverse Expedition of the Chinese Academy of Sciences and the Royal Society of London, 1968. This section is overlain by Cretaceous shale with siliceous bands and underlain by Triassic and Jurassic slates(Fig. 1). According to Zhou Xiang, et al.(1985) the chert normally overlies the dolerite and pillow lava in western Dengqen(Fig. 2).This sample which is light pink in colour has been metamorphosed to a great extent. As the radiolarians are not very plentiful, extraction was carried repeatedly to assure adequate recovery. Sixteen species and 1 gen. et sp. indet. belonging to the orders Spumellaria and Nassellaria including 1 new genus and 3 new species are described.Some elemets such as Praeconocaryomma media Pessagno et Poisson(abundant) and P. aff. magnimamma(Rüst) (abundant) have been found to occur in the Lower Jurassic(Plienshachian) of California, Canutus izeensis Pessagno et whalen(abundant) in the Lower Jurassic(Pliensbachian) of Oregon and the Queen Charlotte Islands, Bagotum modesturm Pessagno et whalen(abundant) in the Lower Jurassic(Upper Pliensbachian) of California, and Canoptum rugosum Pessagno et Poisson(common) in the Lower Jurassic(Lower? and Upper Pliensbachian and Lower Toarcian) of Turkey, California and the Queen Charlotte Islands. This fauna can be assigned to Upper Plienshachian in age.The discovery of radiolarians of from the Upper Jurassic in southern Bangong Lake(1984), and from the Lower Jurassic in western Dengqen, indicate that there is a difference in age between the eastern part and the western part of the Bangong Co-Dengqen—Nujiang Belt, at least in western Dengqen, there is an ophiolite belt of Uppers Pliensbachian age while in the southern Bangong Lake there is an ophiolite belt of Lower Tithonian age.Description of new genus and speciesCenellipsis zongbaiensis sp. nov.(P1. Ⅰ, fig. 13)Ellipsoid, proportion of the longer axis to the shorter one is 8:7. Longer axis about 165μm; shorter one about 145μm. Hexagonal pore frames arranged regularly with moderate nodes at vertices.Katrama dengqensis sp. nov.(P1. Ⅰ, figs. 4, 9)Test as in genus, about 270μm in length, and about 70μm in width. Meshwork consisting of small polygonal pore frames, with tetragonal pore frames at tubular terminal. Cephalis with horn, circular in axial section.Hemicryptocephalis gen. nov.Type species Hemicryptocephalis dengqensis sp. nov.Description Hemicryptocephalis multicyrtid with large inflate(?) terminal post- cephalis, constricted aperture and a sutural pore absent; cephalis poreless, spherical, constricted to form a neck, partly depressed to form the first postcephalis cavity and armed with two descending spines to form the second postcephalis cavity.Range and Occurrence Lower Jurassic(Upper Pliensbachian), Dengqen, Xizang.Hemicryptocephalis dengqensis sp. nov.(P1.Ⅰ,figs. 5, 21—23)Cephalis spherical, poreless, smooth, without apical horn, constricted to form a neck, partly depressed to from the first post-cephalis cavity and armed with two descending spines to form the second post-cephalis cavity. All post cephalis trapezoidal in outline. with the exception of the terminal 1—2 postcephalis which have hexagonal—pentagonal pores, all the other terminal postcephalis are semi-spherical and have tetragonal pores.

    本文记述了西藏丁青宗白乡蛇绿岩剖面中所产的放射虫化石,计12属、16种及1未定属种,其中1新属、3新种。这个动物群中包括Praeconocaryomma media Pessagno et Poisson, Canutus izeensis Pessagno et Whalen,Bagotum modestum Pessagno et Whalen, Canuptum rugosum Pessagno et Poisson等北美早侏罗世普利斯巴阡期的主要分子,有的是北美和土耳其普利斯巴阡晚期和托尔早期出现的分子。因此,推测丁青这个动物群属早侏罗世普利斯巴阡晚期。

     
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