我投资这家公司时，他们说它像直布罗陀巨岩一样可靠。
When I invested my money with the company I was told it was as safe as the Rock of Gibraltar.
没人涉足那个岩岛，不可能在那儿上岸。
No man has ever set foot on that rocky island; it's impossible to land there.
这就像走出烂泥地，来到了石岩上——我们还会忧虑，但已不怕被弄脏。
It was like coming out of slime on to rock—we were worried but not soiled.
研究人员还在路的北端的一个采石场中发现了埃及人使用岩锯的第一个证据。
The researchers also made a discovery in the stone pit at the northern end of the road: the first evidence that the Egyptians used rock saws.
人们曾试图根据现存沉积岩的厚度和目前海洋的盐度水平来计算地球的年龄。
Attempts were made to calculate Earth's age from the thickness of surviving sedimentary rock and from the current level of the oceans' salinity.
在这个过程中，最初形成于海床上的沉积岩可能会向上折叠到26000英尺以上的高度。
In this process, sedimentary rocks that originally formed on the seabed may be folded upwards to altitudes of more than 26,000 feet.
虽然大多数化石是在海洋沉积岩中发现的，但它们也存在于河流和湖泊所留下的陆地沉积物中。
Although most fossils are found in marine sedimentary rocks, they also are found in terrestrial deposits left by streams and lakes.
钻石是稀有火成岩（称为煌斑岩和金伯利岩）中偶尔出现的一种成分，其年代测定方法从未令人满意。
Diamonds, an occasional component of rare igneous rocks called lamproites and kimberlites, have never been dated satisfactorily.
这些方法在地幔最深处揭示了一些意想不到的巨大构造；其中最大的一块是在非洲南端正下方的一块热岩。
These methods have revealed some unexpectedly immense formations in the deepest parts of the mantle; the largest of these is a buoyant mass of hot rock directly below Africa's southern tip.
石灰岩裂开了足以让树根突破洞顶。
The limestone is sufficiently fissured for tree roots to have breached the roof of the cave.
我设法爬上了一个潮湿的倾斜岩脊。
我从未滑过雪、攀过岩和徒步旅行过。
他设法抓住了岩面下方40英尺处的岩脊。
He managed to cling on to a ledge 40 feet down the rock face.
沙经沉积固结形成沙岩。
我在岩脊上站稳。
沙岩容易切割。
我们驶离坎坷的小道，又颠簸过了崎岖多岩的山地。
We left the rough track and bumped our way over a rugged mountainous terrain.
当地的石灰岩如此多孔以致所有的雨水很快渗到地下。
The local limestone is so porous that all the rainwater immediately sinks below ground.
这些岩态行星被称为“类地行星”。
火星是太阳系中四颗岩态行星之一。
Mars is one of the four planets in the solar system that is a rocky planet.
新手可以使用简单的岩点从侧面慢慢爬到顶端。
Newcomers can make their ways slowly up to the top from the sideways with easy holdings.
研究人员最近发现了金伯利岩矿床，这暗示着钻石的存在。
Researchers recently found kimberlite deposits hinting at the existence of diamonds.
兰皮诺认为某些冰碛岩是由流星撞击而产生的，而不是冰川。
Rampino thinks that certain tillites were produced by meteor impacts, not glaciers.
这种气体是硫化氢，上升后与石灰岩裂缝中地下水的氧气混合。
This gas is hydrogen sulfide, rises up and mixes with oxygen in the underground water that sits in the cracks and fissures in the limestone.
当接缝和裂缝扩大形成空洞时，大量的水也会被储存在石灰岩中。
Large quantities of water may also be stored in limestones when joints and cracks have been enlarged to form cavities.
火成岩和变质岩比较致密，通常是结晶性的，颗粒之间很少有空隙。
Igneous and metamorphic rocks are more compact, commonly crystalline, and rarely contain spaces between grains.
在所有不同的深度都有宽阔、狭窄的通道，就像石灰岩中的地下隧道。
There are wide passages, narrow ones at all different depths, like underground tunnels in the limestone.
它们留下了河床或盆地，形成了我们今天仍然可以看到的石灰岩地层。
They left behind their beds or basins as limestone formations that we can still see today.
在水下，火山依旧持续喷发，向上喷射岩浆并形成了一座座玄武岩山峰。
Under the water, volcanoes continued to erupt, sending up magma and forming mountains of basalt.
如今在区分新老湖床方面非常重要的另一个不同点在于石灰岩地层的位置。
Another difference, very important today for distinguishing between older lake beds and newer ones, is the location of the limestone formations.
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