geological period

Archean is the most important geological period in which the iron ore resources formed occupies 79.87 % of the total .

太古宙是区内最重要的地质时期，该时期形成铁矿资源储量占总资源储量79.87%，广泛分布在各古老结晶基底的变质岩系内。

During the geological period of Loess Plateau , the relatively intensive stages of soil erosion included five stages : early period ( 2.5 ~ 2.4 Ma B.P. )

黄土高原地质时期土壤侵蚀的相对强烈期为：更新世早期（2.5～2.4MaB.P.）

Temperature variations in this geological period showed W type trend .

这一地史时期的温度变化大体呈现W型的变化趋势。

Discussion on the geological period of bauxite in Central Guizhou Province

论黔中铝土矿的地质时代

Moreover , a threshold time analysis for oil generation in various geological period of soue rocks shows a relatively satisfactory result .

同时对各生油层系的成油期开始时间作了分析，效果较为理想。

The Holocene , the most recent geological period , has long been regarded as an analog to the future of natural environment process .

全新世作为最新的地质时代，长期以来常被用作模拟未来自然环境的演化过程。

Fossil plants are considered as direct evidence for vegetation succession in the geological period and invaluable materials for the prediction of palaeoelevation .

化石植物既是研究地质历史时期植被演替的直接证据，又是研究古海拔变化的珍贵材料。

A series of discoveries and studies on ancient life forms in the20th century demonstrated that Cambrian was a geological period full of the wildest imagination .

20世纪古生物的一系列发现和研究，证明了寒武纪是一个最能激发人们想象力的地质时代。

The important condition of forming and preserving of Changde gas reservoir is that its gas supplying amount is much more than its diffusing amount during each geological period .

昌德气藏各地质时期的累积供气量远大于累积散失气量，是昌德气藏得以形成和保存的重要条件。

By researching the rotation rate of the earth , the escape of hydrogen and the landscape of the earth in the geological period , the paper supports the Expansion Theory further .

本文通过对地史时期中地球自转速率、氢的外逸以及地表景观的研究，进一步支持了地球膨胀说。

Exploring how the climate changed in the geological period does benefit to the prediction of the climate change in the future which has been very emergent because of the serious environmental crisis now .

探讨地球环境在地质时期的变化规律是人们预测未来气候变化、应对当今和将来日益严峻的环境问题的迫切需求。

At one time , Holocene , which is important time interval in joining geological period to historical period , its climatic evolvement course and rule play an important roles to forecast coming global climatic changes .

同时，全新世作为衔接地质时期与历史时期的一个重要时段，其气候与环境变化过程和规律对预测未来可能出现的全球气候环境变化，起重要的借鉴作用。

From the later and near geological period to the modern geological period , the direction of modern main press stress has been in the direction of NE , the ruling direction of is NNE-NE .

从晚近地质时期到现代主压应力方向为NE向，σ1优势方位为NNE&NE向。

The modeling results manifest that the gentle slope is resulted from the faulting-tilting and faulting activities of different geological period , which is controlled by the basin boundary faults and later formed detachment faults .

根据模拟实验结果，指出缓坡带是块断掀斜作用与不同世代断层活动叠加的产物，其形成主要受盆地边界断层及其后期演化而成的拆离断层控制。

Geologists care about sediments , hammering away at them to uncover what they have to say about the past & especially the huge spans of time as the Earth passes from one geological period to another .

地质学家很关注沉积物，他们敲开它们以发现地球过去的历史，特别是当地球从一个地质时期到另一地质时期的大跨越。

Geologists care about sediments , hammering away at them to uncover what they have to say about the past - especially the huge spans of time as the Earth passes from one geological period to another .

地质学家关心泥沙，潜心研究以揭示过去——尤其是当地球从一个地质时期到另外一个地质时期这种巨大跨度时，地球究竟发生了什么。

Taking the Xikuangshan antimony deposit for example , the paper has analysed the locating mechanism of superlarge antimony deposit spatially and temporally , mainly from the geological period , the geological structural setting and the physico-chemical condition .

从地质时期、地质构造环境和物理化学条件出发，以锡矿山锑矿床为例初步剖析了超大型锑矿床在时间和空间上的定位机制。

During this geological period of long-term reduction in the temperature of the Earth 's surface and atmosphere , the weight of ice sheets was so great that they deformed the Earth 's crust and mantle , causing it to bulge at the middle .

在这一地质时期过程中，地球的表面以及大气层的温度都在降低，冰原冰川的重量如此之大，以至于迫使地壳和地幔发生了变形，使得两者中部发生了隆起。

During the long geological historical period of earth evolution , with the geological function of internal and external power , the precious and non-renewable geological natural heritage was formed and developed .

在地球演化的漫长地质历史时期，由于内外动力的地质作用，形成、发展并遗留下来的珍贵的、不可再生的地质自然遗产。

The southern section of the western Ordos Basin is located in the partition of China east and west two tectonic domains binding site . It has undergone a complex geological history period .

鄂尔多斯盆地西缘南段位于分割中国东、西两大构造域的结合部位，经历了复杂的地质演化历史。

Like the Palaeozoic Era , the Mesozoic Era has been divided into smaller units of geological time called period .

如同古生代一样，中生代也可划分成一些叫纪的较小的时间单位。

Geological regulation of construction period for hydropower and water resources project Code for hydrogeological investigation of water supply

水电水利工程施工地质规程供水水文地质勘察规范

Groundwater hazard is a main kind of geological hazard during the period of mine constructing .

建井期间，地下水害是煤矿地质灾害的主要类型之一。

Achievements of 1 : 50000 regional geological survey in the period of the Eighth Five-Year Plan

青海八五期间1：5万区调工作成果

Mining project should be carried out by combining hydrogeological survey with geological survey of previous period so as to establish basic hydrogeological condition and correlated parameters .

煤炭开采工程应该把水文地质勘察工作与前期地质勘探工作结合进行，以查明基本的水文地质条件与相关参数；

Silver deposits are formed by suffering some important geological events in a certain geological history period and special geological environment .

银矿是在一定的地质历史时期以及特定的地质环境中，受到一些重要的地质事件影响而形成的。

Being situated in a certain geological environments , complex geological bodies were formed over a long geological period of time . Rock mass consists of continuum rock and discontinuous geological structural planes .

岩体赋存于一定地质环境中，经过漫长的地质构造作用，形成连续性状的岩石材料和非连续性状的各种地质结构面组成的复杂地质体。

The geological relic is refers to the non-renewable geological natural resource which formed by the geological processes during the long geological period .

地质遗迹是指在地球漫长的地质历史时期由地质作用所形成、发展并遗留下来的不可再生的一种地质资源。