Recently the study of maar lake and varve chronology is becoming a new field for palaeoclimate research.
火山活动是影响全球变化的重要因素之一，玛珥湖和纹泥年代学是近年来古气候研究的新领域。
But there are still the different opinions on the pision of the succession of strata and geochronology.
经过一百多年来中外学者的研究 ,对五台群的认识取得了重要进展 ,但对其层序的划分和地质年代的归属仍有不同意见。
Daohugou biota-bearing lithostratigraphic succession on the southeastern margin of the Ningcheng basin, Inner Mongolia, and its geochronology;
宁城盆地东南缘晚中生代岩石地层序列完整、连续,但该岩石地层序列及其所含生物群的地质年代归属问题还存在争议。
a geological age, formation
地质年代、 结构.
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
standard global geochronologic scale
标准世界地质年代表
Measurement of geologic time, as through isotopic radioactive decay.
地质年代测定通过放射性同位素衰变来测定地质年代
GEOCHRONOLOGICAL STUDY OF ARCHAEAN ROCKS IN ANSHAN, LIAONING PROVINCE
鞍山地区太古代岩石同位素地质年代学研究
a unit of geological time.
短于一个纪而长于一个代的地质年代的分期。
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
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
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。
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。
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
Brief review and prospect of geochronological development
地质年代学发展历史的简要回顾及前景
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。
Radiocarbon Dating for Geological Disaster Events;
地质灾害事件的～（14）C年代学研究
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
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
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
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