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middle norian
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    Late Triassic and Lower Jurassic ammonoids were newly collected from Kongma,Lhozag and Lonzi,eastern Himalayas,including Tibetites sp.,Anatibetites sp.,Glyphidites sp.,Cyrtopleurites sp., Parajuvavites sp.,Sagenites sp.,Phormedites sp.(Middle Norian),Arnioceras ceratoides,Angulaticeras sp.,Arnioceras sp.,Juraphyllites sp.,Epideroceras sp.(Sinemurian),and Phricodoceras cf.
    晚三叠世诺利期有Tibetites sp.、Anatibetites sp.、Glyphidites sp.、Cyrtopleurites sp.、Parajuvavites sp.、Sagenites sp.和Phormedites sp.。 早侏罗世辛涅缪尔期有Arnioceras ceratoides、Angulaticeras sp.、Arnioceras sp.、Juraphyllites sp.、Epideroceras sp.以及普林斯巴赫期Phricodoceras cf.
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  middle norian
This paper is focused on the facies associations of an Early-Middle Norian stratigraphic succession cropping outin the Northern Calabria (Buonvicino, Cosenza).
      
Coral reefs of Middle Norian age are reported from Rangring, the Pin-Spiti confluence, Kiomo, Latarse (all Spiti), and Pamachen, Hangrang Pass and Tapuk (Kinnaur).
      
Upper triassic coral knoll reefs: Middle Norian, Spiti-Kinnaur, Himachal Himalaya, India
      
In the period from the Carnian to Norian, the flora occupied transitional (ecotonic) environments between temperate and subtropical paleoclimatic regions, while a subtropical climate dominated in the middle Norian.
      


The fossil flora described in this paper occurs in the Upper Triassic Nanying'er Group in the vicinity of Longfengshan and Baojishan. Jingyuan County, Gansu Province. The flora includes two phyla, Pteridophyta and Gymnospermatophyta, and five classes, Articculatae, Filices, Pteridospermopsida, Ginkgopsida and coniferae. There are a total of 11 genera. According to the elements of the flora and its distribution features, three assemblages may be distinguished: Assemblage Ⅰ: Sphenopteris-Neocalamites, Carnian...

The fossil flora described in this paper occurs in the Upper Triassic Nanying'er Group in the vicinity of Longfengshan and Baojishan. Jingyuan County, Gansu Province. The flora includes two phyla, Pteridophyta and Gymnospermatophyta, and five classes, Articculatae, Filices, Pteridospermopsida, Ginkgopsida and coniferae. There are a total of 11 genera. According to the elements of the flora and its distribution features, three assemblages may be distinguished: Assemblage Ⅰ: Sphenopteris-Neocalamites, Carnian in age; Assemblage Ⅱ: Danaeopsis-Bernoullia, early and middle Norian in age; Assemblage III: Dictyphyllum-Podozamites, late Norian-Rhaetian in age. The late Norian-Rhaetian stage is an important coal-forming period in the area. The upper sector of the strata of this period, i.e. Beds 12-16, is a zone favourable for coal accumulation. The synclinal structure and paleofluvial areas provide good coal-forming conditions.

笔者对宝积山晚三叠世地层剖面、植物群组合的分析研究,认为有利于泥炭的形成,并对找煤工作提出建议。

The conodont Epigondolella postera assemblage described in this paper was collected fromthe Upper Triassic Bolila Formation in Gonjo—Jamda area,eastern Xizang and the carbonatite memberof Xianisongduo Formation in Baiyu area,western Sichuan,containing Epigondolella postera, E.abneptis,E.sp.,Neogondolella navicula.All of the fossil Localities are Middle Norian in age.

本文描述了采自藏东贡觉—江达地区上三叠统波里拉组(T_3b)和川西白玉地区上三叠统下逆松多组碳酸盐岩段(T_3~x~2)的牙形刺 Epigondolella postera 组合,成员包括 Epigondolella postera,E.sp.,Neogondolellanavicula。含上述牙形刺化石的地层时代为中诺利期。

The Triassic Bayan Har sedimentary basin has spanned the steady subsidence stage during the Early Triassic and the extensional subsidence stage during the Middle Triassic and early and middle Norian stages of the Late Triassic, i.e. the evolution from a starved deep marine basin to filled deep marine basin. Till the late Norian, it began to be uplifted to be an intracontinental intermountainous basin. Moreover the turbidites are widespread in the Aba Zoige, Xiaojin Barkam, Yajiang,...

The Triassic Bayan Har sedimentary basin has spanned the steady subsidence stage during the Early Triassic and the extensional subsidence stage during the Middle Triassic and early and middle Norian stages of the Late Triassic, i.e. the evolution from a starved deep marine basin to filled deep marine basin. Till the late Norian, it began to be uplifted to be an intracontinental intermountainous basin. Moreover the turbidites are widespread in the Aba Zoige, Xiaojin Barkam, Yajiang, Hoh Xil and Jiulong Basins. All this shows the Bayan Har Basin was an open ocean in the hemipelagic and pelagic environments. The major element, trace element and rare earth element geochemistry of the lithic sandstones in the Zagunao, Zhuwo, Xinduqiao, Lianghekou and Yajiang Formations indicates distinct tectonic settings of the provenances such as passive continental margin, continental island arc, oceanic island arc and active continental margin. According to the Dickinson’s Q F L diagram and trace element geochemistry, the principal source of detritus in the Bayan Har Basin lay in the continental island arc. For instance, the fragments in the Lower Bayan Har Group were derived dominantly from the continental island arcs, subordinately from the passive continental margins; those in the Middle Bayan Har Group were derived from the continental island arcs and oceanic island arcs, and those in the Upper Bayan Har Group were derived from the active continental margins and oceanic island arcs. Compared with other basins mentioned in the text, the Bayan Har Basin exhibits the depositional evolution, from east to west and from bottom to top, from the passive continental margins to active continental margins, continental or oceanic island arcs. Since the Bayan Har Basin was in the zone sandwiched between the Qinling Qilian Kunlun microplate and Karakorum Nujiang Lancangjiang Jinshajiang microplate, and is bounded by the southern margin of the Kunlun Mountains and A’nyemaqen faults on the north, by the Garze Litang fault on the southwest and by the Longmenshan Jinpingshan fault and Yangtze landmass on the east, the margins of the basin may well be correlative with the oceanic crust or continental crust of different tectonic features in the course of oceanic continental transition. The palaeocurrents in the Bayan Har Basin point generally to NW SE, i.e. from the Gozha Lake and Heishibei Lake in the west, through Yanghu Lake, Dogaicoringqang Lake, Xijir Ulan Lake, Hoh Xil, Tongtian River and Bayan Har Mountains, to Yajiang River, Xiaojin, Barkam, Aba and Zoige in the east. The variety of tectonic settings has permitted the complexity and multiple sources of the petrochemical compositions.

本文从岩石地球化学特征微观角度,探索巴颜喀拉三叠纪沉积盆地物源区构造背景。据盆地东部阿坝若尔盖、小金马尔康及雅江次级盆地岩屑砂岩宏量、微量、稀土元素地球化学特征,巴颜喀拉三叠纪沉积盆地物源区的大地构造背景在不同时期表现为被动大陆边缘、大陆岛弧、活动大陆边缘和大洋岛弧等。盆地边缘与不同性质的洋壳、陆壳和过渡壳呈不同程度的接触,是造成沉积物多来源、成分复杂的根本原因

 
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