散布于野外的地热区也反映了冰岛地质的不稳定性。
Iceland's geologic restlessness is also reflected in the geothermal areas that dot the countryside, such as these bubbling mud POTS.
以前很难确定地质期的持续时间。
The duration of previous geologic periods was difficult to determine.
莱尔估算地质年代的方法不是很准确。
Lyell's strategy for estimation of geologic dates was not very accurate.
这些山丘是早期地质时代的遗留物，大部分土壤已被刮光，遭受风吹日晒。
The hills are remnants of an earlier geological era, scraped bare of most soil and exposed to the elements.
我们讨论了30到40亿年前地球和火星上液态水存在的地质证据。
We were discussing the geological evidence of liquid water on Earth and Mars three to four billion years ago.
有证据表明，这一时期发生了重大的生态和地质变化。
There is evidence of major ecological and geological changes during this period.
其他岛屿是通过如火山作用的地质作用形成的，没有陆地生命。
The other islands, which emerged via geological processes such as volcanism, possessed no terrestrial life.
相比于大陆冰川沉积物，海洋沉积物提供了更完整的更新世时期的地质记录。
Ocean sediments presented a much more complete geologic record of the Pleistocene than continental glacial deposits did.
在地球上，移动的构造板块是一个主要的地质元素，对整个地表的动态变化至关重要，对吗？
Here on Earth, moving tectonic plates are a major geological element, just crucial for the whole surface dynamic, right?
他曾是佐治亚大学的地质学客座教授。
He was visiting professor of geology at the University of Georgia.
有了地质地图、书籍和地图册，你就可以找到所有已探明的珍贵矿藏的位置。
With geological maps, books, and atlases you can find out all the proven sites of precious minerals.
我们需要各种类型的协助者，例如地质学者和教师。
We need helpers of all types, e.g., geologists and teachers.
地质学家们已经研究了热量从地表流出的方式。
Geologists have studied the way that heat flows from the earth.
食腐动物和细菌的攻击、化学性腐烂，以及侵蚀和其他地质作用的破坏，导致无法保存的可能性非常大。
Attack by scavengers and bacteria, chemical decay, and destruction by erosion and other geologic agencies make the odds against preservation very high.
科学态度的本质是什么，研究和应用物理、生物、化学、地质、工程、医学或其他科学的人的态度是什么？
What is the nature of the scientific attitude, the attitude of the man or woman who studies and applies physics, biology, chemistry, geology, engineering, medicine or any other science?
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。
Several other mass extinctions in the geological record have been tentatively identified with large impacts, but none is so dramatic as the Cretaceous event.
查尔斯·莱尔根据化石记录对第三纪作出了很好的估计，但他的方法不能扩展到更早的地质时期。
Charles Lyell made a good estimate of the Tertiary Period from the fossil record, but his method could not be extended to earlier geological periods.
目前在法国，有超过2万套的公寓是由温暖的地下水供暖的，这些地下水来自一个叫做巴黎盆地的地质构造的热储，位于巴黎附近。
More than 20,000 apartments in France are now heated by warm underground water drawn from a heat reservoir in a geologic structure near Paris called the Paris Basin.
今天我想谈谈一种使我们能够确定一块土地或其他一些地质特征的年代的方法——年代测定技术。
Today I want to talk about a way in which we are able to determine how old a piece of land, or some other geologic feature is—dating techniques.
数百万年后，强大的地质力量，比如海底火山，会掀起海洋沉积物，形成新的陆地。
After millions of years, powerful geological forces, like underwater volcanoes lift up the ocean sediments to form new land.
美国地质调查局的地质学家托马斯·鲍恩说，这是在古埃及发现的唯一一条铺好的路。
It is the only paved road discovered in ancient Egypt, said geologist Thomas Bown of the United States Geological Survey.
考古学家知道，像这样的土堆是能表明有古代定居点存在的地质特征。
Archaeologists know that mounds such as these are the kinds of geological features that indicate the presence of ancient settlements.
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。
Many scientists provided valuable research and input into the creation of the geologic time scale.
在塔尔西斯高原上发现了三座非常大的火山。塔尔西斯高原是火星赤道附近一片广阔的地质区域。
Three very large volcanoes are found on the Tharsis bulge, an enormous geologic area near Mars's equator.
更多近期的地质研究证明了13000年前的冰川消退现象和整个加拿大不列颠哥伦比亚省主要沿海地区内无冰区的存在。
More recent geologic studies documented deglaciation and the existence of ice-free areas throughout major coastal areas of British Columbia, Canada, by 13,000 years ago.
一般来说，板块的内部在地质上是平静的。
Generally speaking, the interiors of plates are geologically uneventful.
许多物种在地质上很短的时间间隔内灭绝的情况称为大灭绝。
Cases in which many species become extinct within a geologically short interval of time are called mass extinctions.
它们与地球上的河流系统非常相似，地质学家认为它们是早已消失的河流留下的干涸的河床。
They bear a strong resemblance to river systems on Earth, and geologists think that they are dried-up beds of long-gone rivers.
对今天的大多数地质学家来说，韦格纳的《大陆和海洋的起源》是一份令人印象深刻的有先见之明的文件。
To most geologists today, Wegener's The origin of Continents and Oceans appears an impressive and prescient document.
海洋火山岛和它们的热点轨迹对于地质学家尤其有用，因为它们记录了过去的板块在固定地点之上的位置。
The oceanic volcanic islands and their hot-spot trails are thus especially useful for geologists because they record the past locations of the plate over a fixed source.
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