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海退期
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  regressive period
     The sediment amounts of regressive period are more than those of the transgressive period.
     海退期沉积量大于海侵期.
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  “海退期”译为未确定词的双语例句
     the synchronous normal marine sequences, and (2)the sharp increase of the geochemical indexesfor salinity (Sr/Ba), alkalinity (Ca+Mg)/(Si+Al),reducibility (Ni+Zn)/Ga and sulfurflux (S-normalized concentration).
     ②介质的盐度指标(Sr/Ba)、碱度指标(Ca+Mg)/(Si+Al)、还原性指标(Zn+Ni)/Ga和硫通量指标(S归一化含量)均系统增加。 相反,海退期则上述指标显著降低。
短句来源
     (2) Transgression I lasted from that time to Middle and Late Palaeocene;
     早始新世时为海退期,至中晚始新世为第Ⅱ海侵期。
短句来源
     (3) A regressive stage began in Early Eocene; (4) Middle to Late Eocene saw transgression Ⅱ;
     早、中渐新世时为海退期,晚渐新世为第Ⅲ海侵期。
短句来源
     Both events are the same as the global warming events in the time scale. The mean temperature was 7℃ higher than the present temperature during the first warming event,and 13℃ higher than the former cooling event(in the regression period between the Baiyangdian transgression and the Cangzhou transgression)in the northeastern part of Nroth China Plain.
     第一次升温事件(沧州海进期)华北平原的年平均温度比今高7℃左右; 比其以前的降温事件期(沧州海进与白洋淀海进之间的海退期)至少高13℃,如此大幅度的升温事件可能是受西太平洋赤道暖池扩张影响的结果。
短句来源
     Sometimes the quota of dark-coniferous species increased. During the regressive Late Sarmatian, abundance of herbs with halophylous species (Chenopodiaceae, Amaranthus, Artemisia) increased.
     在海退期的晚Sarmatian期,含有喜盐植物(Chenopodiaceae,Amaranthus,Artemisia)的草本类增加。
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     The sediment amounts of regressive period are more than those of the transgressive period.
     海退沉积量大于海侵.
短句来源
     the complete period;
     定型;
短句来源
     Stage Ⅲ.
     Ⅲ.
短句来源
     The Xihuangshan formation of the late Devonian includes four stages of small cycles of regressive type.
     泥盆纪晚锡矿山组包括四海退式小旋回。
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  regressive period
A period of high nipple contact, reminiscent of an infant regressive period, occurred.
      


Palaeogene System in the Taibei Basin of the East China Sea and Neog-ene System in the Zhujiang River Mouth mostly consist of marine deposits. The following conclusions are drawn from the researches of biocoenosis and sedimentography: (1) Terrestrial deposits dominated in Early Palaeocene; (2) Transgression I lasted from that time to Middle and Late Palaeocene; (3) A regressive stage began in Early Eocene; (4) Middle to Late Eocene saw transgression Ⅱ; (5) Early to Middle Oligocene was another regressive stage;...

Palaeogene System in the Taibei Basin of the East China Sea and Neog-ene System in the Zhujiang River Mouth mostly consist of marine deposits. The following conclusions are drawn from the researches of biocoenosis and sedimentography: (1) Terrestrial deposits dominated in Early Palaeocene; (2) Transgression I lasted from that time to Middle and Late Palaeocene; (3) A regressive stage began in Early Eocene; (4) Middle to Late Eocene saw transgression Ⅱ; (5) Early to Middle Oligocene was another regressive stage; (6) Transgression Ⅲ began in Late Oligocene. The division of transgressive stages can help us determine the ages of, contentious strata, therefore marine inter-beds may be used as an important mark for stratigraphic correlation.

中国近海各盆地,据古生物群及沉积特征,在早古新世为陆相沉积,至中晚古新世时为第Ⅰ海侵期。早始新世时为海退期,至中晚始新世为第Ⅱ海侵期。早、中渐新世时为海退期,晚渐新世为第Ⅲ海侵期。在论证地层时代时结合海侵的划分,提出新的见解。海相夹层可作为地层对比的重要标志层。

The purpose of this paper is to study the Holocene biotic variance and to discuss the sea level fluctuation and the palaeoclimatic change in Jianhu area, northern Jiangsu. The fossil materials for the study were collected by the authors in January of 1990 from this area. Especially a, comparatively detailed survey was made in the Qingfeng section of Jianhu and eight kinds of fossils including sporo-pollen, charophytes, foraminiferas, ostracods, gastropods, bivalves, microinsects and acarids were found and identified....

The purpose of this paper is to study the Holocene biotic variance and to discuss the sea level fluctuation and the palaeoclimatic change in Jianhu area, northern Jiangsu. The fossil materials for the study were collected by the authors in January of 1990 from this area. Especially a, comparatively detailed survey was made in the Qingfeng section of Jianhu and eight kinds of fossils including sporo-pollen, charophytes, foraminiferas, ostracods, gastropods, bivalves, microinsects and acarids were found and identified. 8 palynological zones are estabilished and 3 foraminiferal assemblages, 4 ostracod assemblages and 3 bivalve assemblages were recognized in the section. Gastropods, micro-insects and acarids are restricted to several layers in the section and charophytes are only distributed in its top part. The palaeoecology of these faunas is discussed. The biotic alternation is clearly showed in the Qingfeng section. On the basis of the biotic variance, it is suggested that the Holocene transgression started at about 6 900 a B. P. and the highest sea level appeared in the time from 6 400 to 5 400 a B. P. in this area. After 5 400 a B. P. the sea level was ,gradually declined and at about 4 500 a B. P. the sea water rapidly retreated from this area. From 2 200 to 1 000 a B. P. happened another transgression, which was much smaller in intensity than the preceding one. The Holocene palaeoenvironment can be reconstructed in Qingfeng region as follows, marsh (10 000—9 200 aB. P.)—coastal salted mud flat (9 200—— 6 900 a B. P.)—tidal flat (6 900—6 400 a B.P.)—nearshore shallow water (6 400—4 500 a B. P.)—nearshore lowland (4 500—2 200 a B. P.)—freshened lagoon (2 200—1 000 a B. P.). According to the palynological data, in Jianhu area the Hypsithermal is dated at 8 500—3 700 a B. P. and the climatic changes corresponded well to the Holocene global climatic changes.

本文据古生物学和古生态学资料,论述了建湖地区全新世生物群的演替、海平面波动、古地理变迁和古气候变化。生物群资料证实,本区曾遭受两次海侵,全新世中期海侵规模大,为高海面期,属低能潮坪至潮下带上部浅水环境;其晚期海侵规模小,属潮上带环境。两次海侵期之间,出现一明显海退期。据孢粉资料计算,本区气候波动与全新世全球性气候变化规律一致。

According to the alternation of terrestrial beds and transgressive beds, the sedimentary sequence of the South Yellow Sea since the Olduvai subchron can be divided into 15 stratigraphical members. According to the facies analysis, there are 7 transgressive beds and one bed with transgression marks, and classical transgressive-regressive facies sequence aiso appears in the major transgressive beds.Palaeogeographic evolution in the shelf area involved 4 periods:(1) 1.70--0.5Ma B, P. was the stage for the development...

According to the alternation of terrestrial beds and transgressive beds, the sedimentary sequence of the South Yellow Sea since the Olduvai subchron can be divided into 15 stratigraphical members. According to the facies analysis, there are 7 transgressive beds and one bed with transgression marks, and classical transgressive-regressive facies sequence aiso appears in the major transgressive beds.Palaeogeographic evolution in the shelf area involved 4 periods:(1) 1.70--0.5Ma B, P. was the stage for the development of the Palaeo-Yangtze River alluvial plain and delta. Tide influenced-river channel sediments formed during the Olduvai have been found in borehole QC2. The river mouth was located near 124°E. And during the transgressive stage from 0.97--0.73Ma B. P. to the east of 122.2°E, a largescale undersea delta was formed. In the regressive stage, the shelf area became an alluvial plain.(2) 0.50--0.75Ma B. P. was muiti-transgressive fluctuation stage during which 3 transgressive beds(HVI, HV, HIV) developed, being dated to be 0.50--0.30Ms B. P., 0.27--0.20Ma B. P. and 127--75Ka B. P. respectively, with the extent of transgression increasing gradually. Influenced by southeast monsoons, the eastern China continent began to have a larger moisture source.(3) 75--14Ka B. P. was the low sea-level stage during the last giaciat period. The downcutting depth of rivers was up to --133m. Palaeo-Yangtze River system flowed northeastwards into the Sea of Japan through the Tsushima and Korean straits. The interfluvial area became an eroded, weathered high land. In the rock cores, two short-lived, relatively high sea-level stages were recorded, corresponding to two interstades in the last glacial period.(4) The period since 14Ka B. P. is the stage for "Holocene transgression" and the development of the Yellow. River-Huathe River delta. Before 14Ka the sea level rose to --68m. and before 11Ka to --50m, and the sea-level was once at a standstill or slightly got down, which is coincident with the Younger Dryas event. The Yellow River-Huaihe River delta developed on trans- gressive bed HI and consists of the superimpositions of 6 deltaic complexes.

根据海侵层与陆相层相间的特点,Olduvai亚时以来南黄海沉积层序可划分为15个地层段,据相分析存在着7个海侵层和1个具海侵迹象的层位。主要海侵层都具备经典的海侵-海退相序列。陆架区古地理演变可分为4个时期:(1)1.70—0.50Ma,古长江河流平原和三角洲发育时期。Olduvai亚时期间,QC_2孔发现感潮河段河床沉积,河口在124°E附近。0.97—0.73Ma海侵期,在122.2°E以东形成了大型水下三角洲。在海退期陆架区是冲积平原。(2)0.50Ma—75ka,大规模海侵波动期。发育了HVI,HV,HIV3个海侵层,分别为0.50—0.30Ma,0.27—0.20Ma,127—75ka,海侵规模越到后期越大,在东南季风作用下增强了中国东部大陆的水汽来源。(3)75—l4ka,末次冰期低海面吋期。河流最大下切深度达—133m,古长江水系向北东方向经对马海峡和朝鲜海峡流入日本海。河间地形成受侵蚀的风化高地。岩芯中还记录了两个短期的相对高海面期,与末次冰期的两个间冰阶相当。(4)14ka以来“全新世海侵”及黄河-淮河三角洲发育时期。14ka之前海平面回升到—68m,11ka之前回升到—50m,...

根据海侵层与陆相层相间的特点,Olduvai亚时以来南黄海沉积层序可划分为15个地层段,据相分析存在着7个海侵层和1个具海侵迹象的层位。主要海侵层都具备经典的海侵-海退相序列。陆架区古地理演变可分为4个时期:(1)1.70—0.50Ma,古长江河流平原和三角洲发育时期。Olduvai亚时期间,QC_2孔发现感潮河段河床沉积,河口在124°E附近。0.97—0.73Ma海侵期,在122.2°E以东形成了大型水下三角洲。在海退期陆架区是冲积平原。(2)0.50Ma—75ka,大规模海侵波动期。发育了HVI,HV,HIV3个海侵层,分别为0.50—0.30Ma,0.27—0.20Ma,127—75ka,海侵规模越到后期越大,在东南季风作用下增强了中国东部大陆的水汽来源。(3)75—l4ka,末次冰期低海面吋期。河流最大下切深度达—133m,古长江水系向北东方向经对马海峡和朝鲜海峡流入日本海。河间地形成受侵蚀的风化高地。岩芯中还记录了两个短期的相对高海面期,与末次冰期的两个间冰阶相当。(4)14ka以来“全新世海侵”及黄河-淮河三角洲发育时期。14ka之前海平面回升到—68m,11ka之前回升到—50m,并出现了海平面的停顿或轻微下降,与新仙女木事件吻合。黄河-淮河三角洲发育在HI海侵层上,可分出6期三角洲复合体。

 
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