Obviously, it is very difficult to determine the initial age of subduction by using the isotopic age of only one geological event.
显然，如果只想使用任何一种地质事件的年龄来确定碰撞作用的初始作用时间都是很困难的。
Cooling ages are only restricted within the time range of occurrence of an event of metamorphism-deformation and cannot represent the real time of occurrence of a geological event.
冷却年龄只能限制变质-变形事件发生的时间区间，不能真正代表地质事件的发生时间。
It is of great significance to define geological events and merge them into an event group in the research on regional geological evolution and geological correlation between large regions.
正确归并和界定地质事件群在研究区域地质演化特征或进行大区域间的地质对比时具有十分重要意义。
Several other mass extinctions in the geological record have been tentatively identified with large impacts, but none is so dramatic as the Cretaceous event.
地质记录中的其他几次大规模物种灭绝也被认为影响重大，但没有哪一次像白垩纪大灭绝那样夸张。
Observatories watched the event from Earth and scientists hoped the cloud of dust and debris would provide clues to the geological composition of the site.
很多观测站在地表观测了撞击全过程，科学家希望撞击所激起的尘云和碎石能为研究“卓越湖”区域的地质构成提供依据。
The continuous and periodic uplift of the Qinghai-Tibet Plateau since the Cenozoic is an important geological and environmental event during the evolution of the Earth.
青藏高原新生代以来的持续性、阶段性隆升是地球演化过程中重要的地质和环境事件。
Geological records show the event that triggered the dinosaurs' demise rapidly destroyed Marine and land ecosystems, and the asteroid hit is the only plausible explanation for this.
地质记录显示这一事件引发了恐龙的迅速死亡，摧毁了海洋生物和陆地生态系统，唯有星状冲击是这一切的合理解释。
The mountain landslide dam is a common geological disasters, in the event of strong earthquakes, landslides dam formation of the large number of lakes of them, a large scale of it.
滑坡坝及其形成的堰塞湖是山区常见的一种地质灾害，在强地震发生时，滑坡坝形成的堰塞湖的数量多，规模大。
Disaster is an event which endangers the security of human life, property, projects or the environment and the geological disaster is one of the most enormous natural disaster.
灾害是危及人身、财产、工程或环境安全的事件，地质灾害是自然灾害的大家族。
The principle for sei sm ic model of thin beds is obtained and provides a means for physical and geological meanings of spectrum ratios along event.
不仅提供了一种基于新方法的合成模拟手段，更为横向谱比的物理意义分析提供了手段。
The principle for sei sm ic model of thin beds is obtained and provides a means for physical and geological meanings of spectrum ratios along event.
不仅提供了一种基于新方法的合成模拟手段，更为横向谱比的物理意义分析提供了手段。
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