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。
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。
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。
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。
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。
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。
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。
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。
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。
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。
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。
The vastness of geologic time and the slowness of geological processes are difficult to capture in a simple chart.
地质时代的浩瀚和地质作用的缓慢是难以在一幅简单的表格中表达的。
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。
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。
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。
A hydrocarbon deposit, such as petroleum, coal, or natural gas, derived from living matter of a previous geologic time and used for fuel.
碳氢化合物的沉淀，如石油、煤、天然气等，由古代生物衍生而成，经过开发后用作燃料。
An era of geologic time, from the end of the Precambrian to the beginning of the Mesozoic, or from about 570 to about 225 million years ago.
古生代是地质时期的一个时代，从前寒武纪末开始，到中生代初，大约从5.7亿年前到2.25亿年前。
A key aspect of plate tectonic theory is that on geologic time scales ocean basins are transient features, opening and closing as plates shift.
板块运动理论的一个关键点就是在地质历史的尺度内，海洋盆地的开合是因为板块转换，具有转换特征。
Humans are by nature curious, and we are all interested in the Earth on which we live and how various aspects have changed through geologic time.
人天生就具有好奇心，我们对我们居住的地球以及在整个地质时期发生的各种改变都非常感兴趣。
The boundary faults are also poorly closed, and the sealing ability of the internal faults of the basin gradually increased through geologic time.
边界断层封闭性差，盆地内部断层封闭性从古至今逐渐变好。
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。
"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。”
Since the sedimentary accommodation, caused by the changes of base level, has a great difference in geologic time, the types of sand body have vertically a certain difference.
纵向上，由于各时期基准面升降造成可容空间在不同时期差别较大，因此发育的砂体类型也有一定的差别。
The ichnofacies is the grouping of characteristic trace fossil association tending to rscirrence through a rather long interval of geologic time, and their environmental implication.
遗迹相是指一组具有特征的遗迹化石组合，在一段相当长的地质时期中不断的重视以及它们的环境意义。
Using the codes 1 to 6 representing the different time periods in the evolutionary time scale shown in Figure 1, indicate the geologic time period that best corresponds to each description.
用地质年代表(表1)中的不同年代的编号1 -6，来代表每个描述所出现的地质年代。
It is also possible to read about the history of the geological time scale, and find out more about how it is organised, or go to a specific time period using the UCMP geologic time Machine.
从这里可以了解地质时标的历史，地质时标的组成，也可以利用加州大学古生物博物馆的“时间机器”进入特定的地质时期。
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。
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。
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。
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