Biochronology The measurement of geological time using biological events.

使用生物学事件来测学时间。

Concentrators in geological sciences elect either geology or geography.

主学的学生选学或理课程。

The mines had been closed down following a geological survey.

继一次调查之后,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勘察。

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

摘偏碱性花岗岩及与金的成矿活动有关的硅化、粘土化蚀变是黑刺沟金矿田规模金矿床存在的前提。

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

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,控制岸坡稳定的主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.

班的学生将把本学年的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.

它们产出的特征表明，岩石圈相对幔对流体，持续或幕式向西滑移。

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

雷达是一种通过利用下介的不连续性来探测下目标的无损检测工具。

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

年代实验室是首家商务运作的、可为学和考古学团体提供高的同位素分析的实验室。

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

氟是重生命元素,原生环境中氟过或缺乏均会导致机体畸变或代谢异常。

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

金沙江虎跳峡区内、外动力作用十分显著，岸坡变形破坏体的空间分布具有鲜明的段性。

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的富含有机的湖沼相沉积环境、特定的、形条件为下水砷异常的原因。

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相始终控制着剩余油储,应作为挖潜的重点之一。

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

认识和重建某个历史时期盆的原始构造格局和沉积特征，就必须除去后期叠加的构造层和构造变形，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，探讨了在基于观测数据、钻孔数据、平面图数据、剖面图数据的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.

摘通过大比例尺平面续图、剖面测和显组构分析，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.

简单介绍苏丹港区珊瑚礁灰岩的特征及不均匀风化现象,以及该层的基承载力。

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的形象思维入手，对于处理具有强噪声、模糊性、非线性的下工程信息，它具有广阔的应用前景。