1.
Of or relating to the oldest known rocks, those of the Precambrian era, that are predominantly igneous in composition.
太古代的所知的最古的前寒武纪时代岩石，其组成成分主要为火成岩的，或与之相关的
2.
A90- minute documentary about life before the dinosaurs.
从530万年前的寒武纪到248万年前的三叠纪，是恐龙时代尚未到来的时期。
3.
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。
4.
Chronological Framework of the Early Precambrian Important Events in the Luliang Area, Shanxi Province
吕梁地区早前寒武纪主要地质事件的年代框架
5.
THE EARLY PRECAMBRIAN CHRONOTECTONIC FRAMEWORK IN THE WUTAISHAN AREA,SHANXI
山西五台山地区早前寒武纪年代构造格架
6.
Cambrian The earliest period of the Paleozoic era, about 590-510 million years ago.
寒武纪:地质年代古生代的第一个纪，在五亿九千万到五亿一千万前。
7.
BOUNDARY EVENT BETWEEN PRECAMBRIAN AND CAMBRIAN PERIODS IN SPECIAL REFERENCE TO CARBON AND OXYGEN ISOTOPES
碳氧同位素与前寒武纪和寒武纪边界事件
8.
Cambrian: the beginning of the Paleozoic Era Animals with hard-shells appeared in great numbers for the first time during the Cambrian.
寒武纪：古生代的开始（距今5亿1,400万年前），具有硬壳的生物在寒武纪第一次大量出现。
9.
THE DIVISION PROBLEM ABOUT THE AGES OF THE TUMEN GROUP OF THE UPPER PRECAMBRIAN IN THE MIDDLE-SOUTHERN SHANDONG PROVINCE
鲁中南上前寒武系土门群的时代归属问题
10.
Among them the Precambrian and Cenozoic eras are the main metallogenic epoches in the world.
就全球而言，前寒武纪和新生代是金矿的重要成矿期。
11.
any period of time during which glaciers covered a large part of the earth's surface.
从前寒武世纪以来地球地面大部分被冰川所覆盖的任何地质年代。
12.
Geochronology of Early Precambrian Magmatic Activities in Aketashitage, East Altyn Tagh
阿尔金山阿克塔什塔格早前寒武纪岩浆活动的年代学证据
13.
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
14.
GEOCHRONOLOGICAL SUCCESSIONS OF THE EARLY PRECAMBRIAN GRANITIC MAGMATISM IN SOUTHERN LIAODONG PENINSULA AND ITS CONSTRAINTS ON TECTONIC EVOLUTION OF THE NORTH CHINA CRATON
辽东半岛南部早前寒武纪花岗质岩浆作用的年代学格架
15.
DISCUSSION ON ISOTOPIC GEOCHRONOLOGY OF PRECAM BRIAN JIAMUSI BLOCK
关于佳木斯地块前寒武纪同位素地质年代学问题的讨论
16.
Forming Ages of Early Precambrian Metamorphic Strata in Shandong Province--Proofs of Zircon SHRIMP U-Pb Dating
山东早前寒武纪变质地层形成年代——锆石SHRIMP U-Pb测年的证据
17.
Early Precambrian Crustal Evolution in the Dengfeng Area,Henan Province(eastern China):Constraints from Geochemistry and SHRIMP U-Pb Zircon Dating
登封地区早前寒武纪地壳演化—地球化学和锆石SHRIMP U-Pb年代学制约
18.
This paper has made a detailed analysis of the temporal and spatial distribution of Precambrian mineral deposits in China.
文章详细地分析研究了中国前寒武纪矿床的时空分布。