查询词典 geologic time

When constructing senior highways in China, the project of multi-arch tunnel is often adopted in special geologic and limited topography districts in order to meet the need of road type and outspreading road, to get better technological and economical purpose.

我国在高等级公路的建设中，在特殊地质及地形条件受限的地区，为了高速公路线型及展线的需要，同时为了获得良好的技术经济效果，常常选择连拱结构的隧道方案。

The gravity ma Pis the main production of gravity measurement and has extensive application in some areas, such as geologic and prospect.

重力图是重力测量的主要成果之一，在地质、探矿等领域中有着广泛的用途。

Based on the early geologic studies, more integrated strata units and frame was established in Yunnan and Guizhou. The characteristic of macroscopical lithofacies and paleogeography was also raveled basically in this area. It was ascertained that some perfect developed PTB sections from marine via paralic to terrestrial facies lie in western Guizhou and eastern Yunnan. What's more, the stratigraphic sequence of Marine PTB or Terrestrial PTB across the PTB in this area is similar to that of the Meishan Section.

通过早期地质研究，在我国云南、贵州地区基本建立了比较完整的地层单位与格架，也基本弄清了该区的宏观岩相古地理特征，明确了黔西滇东地区存在发育完整的从海相—海、陆交互相—陆相的二叠系—三叠系界线剖面，而且该区海、陆相界线地层序列与浙江长兴煤山全球界线层型剖面具有一定的相似特征，使得在该区开展陆相二叠系—三叠系界线剖面的高精度划分和海、陆界线地层的高精度对比均成为可能。

Some prescribes about the test method of alkali aggregate and alkali-aggregate reaction have been shown in the regulations of geologic reconnoitering and the test method of the hydraulic concrete.

中国已建的混凝土大坝中，有些也含有一定量的碱活性骨料，但由于采用了低标号水泥和大量的活性混合材，因此至今未发生碱骨料破坏反应；但也有个别工程，虽经碱骨料反应的检测，并采用了一定的抑制措施，但运行20年后，在大坝溢流面混凝土中出现了碱骨料反应的微观和宏观裂缝破坏。

On the basis of surveying and gathering documents and previous jobs, a lot of work was done on field geologic research, core observation and description, sampling and analysis, then data procession and compilation. Finally, partial seismic and log date were rehandled and interpreted.

论文在系统地调研和整理大量各种文献资料和前人研究成果的基础上，进行了多次野外地质调查、岩芯观察描述、系统采样及分析测试，做了大量的数据整理和图件编制工作，并对部分地震及测井资料作了重新处理和解释。

This paper analyzes the difficulties faced by marine gas exploration in the western Sichuan Basin, and presents 6 directions for research, such as source rocks, reservoirs, preservation conditions, accumulation conditions, geologic theory of marine oil/gas reservoiring and methodologies for analysis and evaluation of petroleum geology in the western Sichuan Basin.

为此，对川西海相天然气勘探的难点进行了分析，并指出了包括：烃源-资源、储层、保存条件、聚集条件、川西海相油气成藏地质理论、川西海相油气地质分析评价方法技术系列等在内的6个科技攻关方向，总结出&强化盆地构造演化与恢复研究，重视油气成藏地质研究，加大基础地质研究投资力度，设立一批围绕海相油气成藏地质理论和地质分析评价方法技术系列的专项课题，不要大而全，强调专项攻关，各个击破&的技术对策，同时提出了开展13个专项研究的建议。

The most common types of earthquakes are those caused by ruptures of geologic faults or earthquakes associated with volcanic activity.

最常见的地震是那些由断层或者是火山活动引起的。

Firstly, geologic earthquakes - sometimes called tectonic earthquakes - are caused by the rupturing of faults in the earth's crust.

首先，地质地震-有时也叫做构造地震-是由地球的地壳层破裂造成的。

Whitebait Valley Group,a typical structure relic like silicified wood was developed,which we call "mat-roll structure" and rhere has been no record of this kind of structure in geologic literatures so far.

在下元古界银鱼沟群的大理岩中，发育了一种与硅化木形状相似的典型构造遗迹，我们称之为&席筒状构造&这种构造截止目前在地质文献中尚未记载。

A brief introduction is made to the geologic feature of the mine and region, and it is summed up that the granodiorte, silicified zone and geochemical anomaly of As are three prospec...

本文简要地介绍了区域和矿区地质特征，总结出花岗闪长斑岩，硅化带和As元素化探异常等3条找矿标志，建议在该区开展大比例尺化探测量和地质填图，普查北西向硅化断裂破碎带，并对石子坳含金破碎带进行深部验证，寻找隐伏金矿床。

This paper designs the communication system of radio telescope FAST.

针对500m口径球面射电望远镜FAST分布式控制系统的特点完成了其通信系统的设计。

Political sheep's step-by-step a large number of fossils unearthed in the county soil Ma Ali after rural village in the middle of sallow pelitic siltstone.

步氏和政羊化石大量出土于广河县阿力麻土乡后山村，产于灰黄色泥质粉砂岩中。