Many scientists provided valuable research and input into the creation of the geologic time scale.
许多科学家为地质时间尺度的建立提供了有价值的研究和投入。
The drift of the last glaciation was deposited during one of the most recent epochs of geologic time, the Pleistocene, which lasted from 1.8 million to 10,000 years ago.
最后一次冰川作用的漂浮物沉积在最近的其中一个地质时期——更新世，这段时期从180万年前持续到1万年前。
As geologists, we examine layers of sediment on the Earth' s surface to approximate the dates of past geologic time periods.
作为地质学家，我们研究地球表面的沉积层以估算过去地质时期的年代。
Over geologic time the central volcano becomes extinct, followed by erosion and subsidence beneath the sea surface, leaving the coral reefs as a ring around (or cap on) the submerged island remnant.
由于侵蚀和海底的下沉，经过地质时代的变迁，中心的火山已经不见踪影，而只留下珊瑚礁环绕或覆盖在沉入海底的火山岛上。
Paramushir island in the northern Kurils is an example of a large island built by several volcanoes over geologic time.
千岛群岛北部的幌筵岛是在地质年代中由数座火山形成大型岛屿的一个实例。
There is a huge amount of fossil evidence. And its walls provide a record of three of the four major periods of the Earth's geologic time.
这里有大量的化石，而且大峡谷的峭壁上为我们提供了四个主要地质时期中的三个时期的信息。
Less ice covers the Arctic today than at any time in recent geologic history.
今天的北极冰层比近代地质史上任何时期都少。
For the response of the ice sheets to a still warmer world, older periods in geologic time offer parallels.
对于冰川对变暖世界的回应，以前的地质时期也出现过相似的状况。
You can't discuss climate change, Prof. Laughlin says, without looking backward across geologic time.
劳克林说，在讨论气候变化问题时，必须对比过去地质时期的情况。
"It must have happened in a matter of weeks, " says Elrick. "What we see here is the death of a peat swamp, a moment in geologic time frozen by an accident of nature."
Elrick说：“当时的那场变故一定是在几周内发生的，我们现在所看到的这片泥炭沼泽遗迹，在地质学时间上只是大自然一次瞬间意外的快照。”
Although rare on human timescales, over geologic time earthquakes are frequent in the area.
影响地质时期的大地震虽然在人类的历史中非常罕见，但该地区地震活动自古以来就非常频繁。
Though they seem to creep along at impossibly slow speeds, in geologic time glaciers are relatively fast, powerful landscape artists that can carve out valleys and fjords in just a few thousand years.
尽管它们的变化速度似乎缓慢的不可思议，但相对于地质时期来说，冰川是个快速、强大的雕刻艺术家，仅在数千年时间内就雕刻出了大量的山谷和峡湾。
Over geologic time, they have ebbed and flowed with natural climate cycles.
在整个地质时期，它们随着自然地气候循环减小或涨大。
As he explains, the Geologic Time Scale is largely based on the stratigraphic record.
他解释说，地质时间尺度很大程度上基于对地层的记录。
Over geologic time, increased pressure from the overlying rocks changed the layers of organic material into coal.
经历了数代地质期，上层岩石逐渐增大的压力改变了无机矿物层的构成，最终形成了煤。
On a geologic time scale, the recent, human-induced planetary warming has been quite sudden, and the huge ice sheets have only just started to respond.
从地质时间的尺度来看，近来人类活动引起的地球变暖现象是相当突然的，巨大的冰盖这才刚刚开始有所反应。
In fact, only 18, 000 years ago (a blink of an eye in geologic time), twice this amount of ice covered the northwest of North America.
事实上在18000年前，两倍于现在的南极的冰覆盖了北美的西北部。
Just at this time I left Caen, where I was then living, to go on a geologic excursion under the auspices of the school of mines.
就是这时期，我离开了卡昂，这个我生活的地方，受我所在学院的资助进行一次旅行。
The time section made by mathematically simulating a geologic model offered from drilling data conforms better with factual data.
根据钻井资料提供的地质模型，用数学方法进行模拟，所得的时间剖面和实际资料有较好的吻合。
Geologic time unit, rock stratigraphic units and time stratigraphic unit.
地质年代单位、岩石地层单位、年代地层单位。
The longest division of geologic time, containing two or more eras.
地质上最长的一段分期；两个或更多的代。
A hiatus is the total interval of geologic time.
一个沉积间断是地质时间的总间隔。
Igneous rock reservoirs are characterized by their extensive distribution, long geologic time and no exclusiveness of rock types.
火成岩油气储层具有分布范围广、地质时代长、不具岩石类型的专属性。
Hence it is considered that a galactic year can be based on to institute an ideal geologic time scale in which a galactic year is an era.
银河年是建立理想地质年代表的基础，每一个银河年就是一个代。
They are the result of geologic processes within the earth and can happen in any weather and at any time during the year.
地震是地质运动的结果，不管天气如何，一年四季无论何时都有可能发生地震。
Therefore, geologic conditions and environmental protection must be concerned simultaneously at the time of planning, designing and construction of a project.
建议工程技术人员在进行工程规划、设计和施工中既要考虑地质条件的制约因素，更要注意保护地质环境。
The good response relationship between time-frequency spectrum and geologic structural feature provides straightforward foundation for seismic-geologic fine interpretation.
时频谱与地质结构特征之间的良好响应关系为地震地质精细解释提供了直观的依据。
Yunnan Province is rich in mineral resources and at the same time mining of the mineral resources result in serious geologic environment problem.
前言：云南省矿产资源丰富，同时矿产资源的开采也带来了严重的地质环境问题。
Yunnan Province is rich in mineral resources and at the same time mining of the mineral resources result in serious geologic environment problem.
前言：云南省矿产资源丰富，同时矿产资源的开采也带来了严重的地质环境问题。
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