1.
The sudden appearance of abundant and varied fossils makes a worldwide time line for dividing the geological time scale into two main parts.
丰富多样的化石的突然出现为在世界范围内把地质年代划分为两大主要部份提供了时间界限。
2.
The longest division of geologic time, made up of one or more periods.
纪元地质年代最长的划分，由一个或多个阶段组成
3.
In the geological time scale, there are five eras, the archeozoic which means "beginning life", the Proterozoic which means "fore life",
在地质年代表中共划分为5个代，太古代的意思是 “生命的开始”。元古代意即“生命之前”，
4.
Lithostratigraphic division and correlation of the Early Precambrian （Archean－Paleoproterozoic） in North China and age assignment of the lithostratigraphic units
华北早前寒武纪(太古宙-古元古代)岩石地层单位划分、对比及地质年代属性讨论
5.
a geological age, formation
地质年代、 结构.
6.
The historian dates by years, the geologist by millions of years
历史学家以年为单位划分历史时期，地质学家以百万年为单位划分地质期。
7.
a unit of geological time.
短于一个纪而长于一个代的地质年代的分期。
8.
Quaternary Lithostratigraphy and Chronostratigraphy Division and Correlation in Kunming Basin;
昆明盆地第四纪岩石地层与年代地层划分与对比
9.
The chronology of the earth's history as determined by geologic events.
地质年代学以地质事件测定的地质历史年代学
10.
Division and age of anogubikute-facies strata in the Hongjishan area of northern Tibet,China
藏北红脊山地区角闪岩相变质地层的划分及时代
11.
standard global geochronologic scale
标准世界地质年代表
12.
Precambrian time accounts for as much as eighty-five percent of all geological time.
前寒武纪占据了整个地质年代的百分之85。
13.
Study on Ash Components and Fusing Regularity of Coal in Different Geological Time;
不同地质年代的煤灰成分及熔融特性规律
14.
THE STRATIGRAPHICAL AGES,DIVISION AND CORRELATION OF THE EARLY PRECAMBRIAN IN THE TAIHANGWUTAI AREA,THE YANSHAN AREA AND THE EASTERN SECTOR OF THE YINSHAN MOUNTAINS
太行五台区、燕山区、阴山东段的早前寒武纪地层年代、划分及对比
15.
Age and Stratigraphical Division of Diluvium-Depositional Sub-Facies of Debris-Flow in Quaternary in Xiaojiang Drainage, Yunnan
云南小江流域第四纪洪积—泥石流沉积的年代与地层划分
16.
CLASSIFICATION OF CHRONOSTRATIGRAPHIC AND THE BIOTA FROM THE END OF DEVONIAN PERIOD TO EARLY CARBONIFEROUS EPOCH OF NORTHERN GUANGXI
桂北泥盆纪末至早石炭世生物群及年代地层划分
17.
Study on Intrusive Rocks Forming Period and Stages Division in Ludong Area
鲁东地区侵入岩形成时代和期次划分——锆石SHRIMP U-Pb年龄的证据
18.
DIVISION AND CORRELATION OF LATE ARCHAEOZOIC?BASEMENT METAMORPHIC ROCK SERIES IN XIAOSHAN?AND XIAOQINLING REGIONS
小秦岭崤山地区晚太古代基底变质岩系划分与对比