1.
a unit of geological time.
短于一个纪而长于一个代的地质年代的分期。
2.
a relic or impression of a plant or animal that existed in a past geological age.
生存于过去的地质年代的动物或植物的遗迹。
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.
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
5.
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
6.
a geological age, formation
地质年代、 结构.
7.
Radiocarbon Dating for Geological Disaster Events;
地质灾害事件的～（14）C年代学研究
8.
Regional Geological Survey in North-Western of China from 1920s to 1930s;
20世纪20~30年代的西北区域地质调查
9.
The Development of Chinese Geologic Industry in the 1950s;
开拓与发展:1950年代中国地质业的成就
10.
standard global geochronologic scale
标准世界地质年代表
11.
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
12.
Significances and Applications on Geologic Times of Seismic Velocity;
地震波速度的地质年代意义及其实际应用
13.
Geochronological Study of Alkaline Rocks in Panxi,SW China and Its Geological Implications;
攀西地区碱性岩的年代学研究及其地质意义
14.
The chronological and geological implications of the Cenozoic basic magmatic activities in Piqiang Basin,Xinjiang,China
皮羌盆地新生代基性岩浆活动的年代学及其地质意义
15.
Petrological and Geochronological Research of Blueschist in Heilongjiang Complex and Its Tectonic Signification;
黑龙江杂岩带中的蓝片岩岩石学、地质年代学研究及其地质意义
16.
Study on Properties and Ages of Nehe Dagudui Burials and Their Relevant Problems
讷河大古堆墓地的性质、年代及相关问题的研究
17.
Brief review and prospect of geochronological development
地质年代学发展历史的简要回顾及前景
18.
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。