Biochronology The measurement of geological time using biological events.

使用生物学事件来测量地学时间。

Concentrators in geological sciences elect either geology or geography.

主修地学学生要选修地学或地理课程。

The mines had been closed down following a geological survey.

继一次地调查之后,这些矿井已被关闭了。

The workers skirted the edge of the cliff on a geological survey.

工人们沿着崖壁作了一次地勘察。

Alkalescent granites and gold-related silication and argillation are geological prerequisites for the formation of noticeable gold deposits.

摘要偏碱性花岗岩及与金成矿活动有关硅、粘土是黑刺沟金矿田规模金矿床存在地前提。

Simple geological structure, an open-pit mine, the development of high value for one of the three cryptomelane.

地构造简单，属露天矿，开发价值高，为全国三大钾矿之一。

The main controlling factors of embankment slope stability are engineering geological petrofabric,rockmass structure type and structure of embankment.

在岸坡稳定性分析评价中,控制岸坡稳定主要因素有岸坡岩性组合特征、岩体构类型和岸坡构类型。

The students of the geological class will be out on field exploration for the duration of the school year.

地班学生将把本学年全部时间用作野外勘探。

Geological charact eristics at their locations show continuous or pulsive westward slipping of lith osphere with respect to convection cell.

它们产出地特征表明，岩石圈相对地幔对流体，持续或幕式地向西滑移。

Geological radar is a non-destructive test instrument that detect the underground objects by the quality of discontinuousness of the underground medium.

地雷达是一种通过利用地下不连续性来探测地下目标无损检测工具。

Geochron Laboratories was the first laboratory to provide high quality isotopic analyses to geological and archaeological communities on a comercial basis.

地年代实验室是首家商务运作、可为地学和考古学团体提供高量同位素分析实验室。

Fluorine is an important trace bio-essential element.Its deficiency or excess related to geological setting can cause organism distortion or supersession abnormality.

氟是重要微量生命元素,原生环境中氟过量或缺乏均会导致机体畸或代谢异常。

In Tiger Leaping-gorge region, endogenic and exogenic geological processes are very prominent, and in different reaches the deformed and failured masses develop dissimilarly.

金沙江虎跳峡地区内、外动力地作用十分显著，岸坡形破坏体空间分布具有鲜明地段性。

We propose that As anomalism in groundwater possibly resulted from the combined effects of organic matter-enriched lacustrine sediments, geological setting and topographical characteristics.

通过研究，可以看出以还原环境为主富含有机湖沼相沉积环境、特定地、地形条件为地下水砷异常原因。

Reserves geological and microtectonics fe ature play important control function of remnant oil distribution.Taking the Se ries as a whole, it is eviden...

从整个层系看前缘席状砂微相始终控制着剩余油储量,应作为挖潜重点之一。

Then use antitone structural analysis method to recognize and reconstruct the primary tectonic structure and sedimentary feature of a basin in certain geological history.

要认识和重建某个地历史时期盆地原始构造格局和沉积特征，就必须除去后期叠加构造层和构造形，即反序构造分析法。

On basis of this model, the modeling methods and modeling flow were discussed based on data source of geological observation, drillhole, ichnography and section map.

在此基础上，探讨了在基于地观测数据、钻孔数据、平面图数据、剖面图数据断层建模方法和建模流程。

Large scale planar geological mapping, profiling survey and microfabric analyses proved that lithophysa structure was developed in rhyolite in Yingcheng coal mine area, Jiutai City.

摘要通过大比例尺平面地续图、剖面测量和显微组构分析，九台营城煤矿区流纹岩中石泡构造发育。

This paper introduces the geological features and the unhomogeneous weathering phenomenon of coral reef limestone of Sudan Port Area,and the bearing capacity of this layer.

简单绍苏丹港区珊瑚礁灰岩地特征及不均匀风现象,以及该层地基承载力。

The ANN starts with simulating cerebric visual thought, and it has wide application foreworld for geological information of underground engineering,taking on strong buzzing, fuzziness, nonlinear.

神经网络方法从模拟人脑形象思维入手，对于处理具有强噪声、模糊性、非线性地下工程地信息，它具有广阔应用前景。