Charles Lyell made a good estimate of the Tertiary Period from the fossil record, but his method could not be extended to earlier geological periods.
查尔斯·莱尔根据化石记录对第三纪作出了很好的估计，但他的方法不能扩展到更早的地质时期。
There are clickable links to each geological period providing accompanying text and graphics.
从这里可以点击进入各个地质时期，并伴有文字和图表说明。
Human may define a geological period in the way dinosaurs — and their vanishing act — helped mark the Jurassic.
恐龙以及恐龙的消失是侏罗纪的标志，人类或许也会像它们那样定义一个地质时期。
The Ediacaran Period, from 635 to 542 million years ago, is the first new geological period to be named in more than a century.
埃迪卡拉纪从六亿三千五百万年前持续到五亿四千二百万年前，是近一个多世纪以来科学家命名的第一个新的地质时期。
A series of discoveries and studies on ancient life forms in the 20th 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。
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。
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.
地质学家关注沉积物，通过它们地质学家可以揭示过去，特别是在地球从一个地质年代跨越到另一个地质年代时那些巨大的时间跨度。
In this long geological period from 1800 to 800million years ago, the northern part of North China underwent many times, of up and down motion, many times of transformation from marine to contin…
在这一漫长的地质历史时期（距今1800～800百万年），华北北部经历了多次升降运动，多次海陆变迁，逐渐由相对活动状态转变为相对稳定状态。
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。
There is evidence of major ecological and geological changes during this period.
有证据表明，这一时期发生了重大的生态和地质变化。
S. Geological Survey estimates the southern tip of Florida can expect more than 60 hurricanes over a 100-year period.
美国地质调查局估计，佛罗里达州南端，可以预计在100多年的周期里会遭到60次飓风的袭击。
The main activity of platform are that the original geological structure and Au were reformed intensely by Yanshan-Xishan period structure and magmatic activity.
地台活化主要表现为燕山—喜山期构造和岩浆活动对原有地质构造和金矿化进行了强烈的改造。
Chemical fossils Particularly resistant organic chemicals present in geological strata that are thought to indicate the existence of life in the period when the rocks were formed.
残存于地质地层中的有机化学物质，当这样的地层被发现时，可以预测出那个地层形成时期的生命活动现象。
At the present point in time, meteorological and geological activity is significantly increasing and will do so at a non linear rate until we enter the short term period before the Pole Shift.
在目前的时间点上，气象和地质活动显著增加了，并会以非线性速下去，一直到我们进入极移前的短时期。
The Cretaceous is a typical period for greenhouse climate in geological history and has become an important paleoclimate simulation period in international paleoclimate modeling community.
白垩纪是地质史上一个典型的温室气候时期，国际上围绕白垩纪气候成因开展了一系列模拟研究。
The paper expounds the geological logging contents, method, data sorting out, and site inspection to the previous investigation reports during the engineering construction period in LANPS.
本文阐述岭澳核电站工程建造阶段勘测地质编录内容、方法、成品整理和对前期勘测成果的现场检验。
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。
The migration nature of fluid and post-reformation of petroliferous basins resulted in multi-period of migration, accumulation, pool-forming and destruction of oil and gas in geological history.
流体本身的运移性与含油气盆地后期的改造作用，导致了油气流体在地质历史上可具有多期运移、聚集、成藏和破坏的过程。
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。
Because the geologic processes always lasted for a long period and were very complicated, the geological bodies often were multi-genesis and experienced many building stages or processes.
由于地质作用的长期性和复杂性，地质体往往经历了多个成因阶段或具有复杂的成因过程。
Based on a summary of the changes, this paper discusses and expounds the geological work in the new period and the objective laws in the work to be followed.
从分析总结这一系列转变入手，对新时期地质管理工作和应遵从的地质工作客观规律进行讨论和阐述。
The good effectiveness of the engineering geological exploration works has been achieved with small working quantity and in a short exploratory period.
介绍了昆明勘测设计研究院在景洪水电站建设中的工程地质勘察实践，总结了个人在工作过程中的一些体会和经验。
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；
We should do well the cost estimation of highway project, because of long construction period, changing situation, many types of materials and equipment, large differences in geological conditions.
公路项目工程由于工期长，情况变化大，材料设备类型多，地质条件差别大，因此应做好成本测算。
Hydrological characteristics decide the main period of the river geological process.
河流水文特征，决定河流地质作用的主要时期；
By researching the geological features of gas reservoirs in Xu 2 section of Pingluoba, I understand the sedimentary environments and lithologic feature in this period of study area.
通过对平落坝须二气藏地质特征的研究，了解研究区须二时期沉积环境，岩性特征。
The strata in Devonian period of Shuangwang area was divided in detail, going by new mapping theory and method of the regional geological survey.
本文采用新的区调填图理论和方法，详细划分了双王地区的泥盆纪地层，论述了岩相古地理特征。
The strata in Devonian period of Shuangwang area was divided in detail, going by new mapping theory and method of the regional geological survey.
本文采用新的区调填图理论和方法，详细划分了双王地区的泥盆纪地层，论述了岩相古地理特征。
The Permian period is an important period for geological evolution of the Tarim basin.
二叠纪是塔里木盆地演化的一个很重要阶段。
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。
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