地壳

Deep in the earth's crust the rock may be subjected to temperatures high enough to melt it.

在地壳深处,温度如此之高,可能足以将岩石熔化.

Stratigraphy studies the sequence of the rocks in the earth's crust.

地层学研究地壳中岩石的层序.

Where two continental plates collide the plates either buckle and compress.

当两块大陆板块碰撞到一起,任何一块地壳板块都会产生变形和压缩.

Strains in the Earth's crust seem to pile up.

地壳的应力似乎一直在积聚着.

Some of the minute changes in the earth's crust can be detected by means of instruments.

地壳一些微乎其微的变化,有的是可以通过仪器测量出来的.

Depths of these hypocenters concentrate at about 12 km deep in the upper crust.

这些震源深度集中在地壳上部约12公里处.

The earth's crust is between 5 and 25 miles thick.

地壳有五至二十五英里厚.

We will now treat some examples of the temperature field in the crust.

现在我们讨论一下地壳温度场的某些例子.

Under heat and pressure, rocks of the earth's crust move slowly and gradually.

在热和压力的作用下, 地壳的岩石缓慢而逐渐运动着.

The most ancient parts of the continental crust are 4000 million years old.

大陆地壳最古老的部分有40亿年历史。

All indications are that it is everywhere basaltic and relatively constant in composition.

所有的迹象只表明海洋地壳处都是玄武岩质的,组成也比较稳定.

Then for a dwelling place, far'neath the earth crust.

那麽对于居住的地方, 远在地壳之下.

Weight of the crust changes as elevations are eroded and materials are deposited elsewhere.

当高地受到侵蚀,物质沉积到别的地方时,地壳的重量就改变.

The continental crust is much thicker than average beneath the great mountain belts.

在高山地带下面的大陆地壳,其厚度要比平均厚度大得多.

Numerical values of the temperatures below the crust can still be given only within broad limits.

地壳以下温度的具体数值只能给出粗略的估计.