We could do this in theory by studying an enormous impact crater, known as the South Pole-Aitken Basin.
理论上，我们可以通过研究一个名为南极-艾特肯盆地的巨大陨石坑来做到这一点。
An iridium-enriched sediment layer and a large impact crater in the Yucatn provide evidence that a large meteorite struck Earth about 65 million years ago.
尤卡坦半岛上富含铱的沉积层和一个巨大的陨石坑提供了证据，证明了约6500万年前，一颗大型陨石撞击了地球。
In other deposits, they're either sedimentary, or in the center of an impact crater.
其它矿藏要么是由沉淀物生成的，要么处于撞击火山的中心。
This image shows part of a 7.4-mile-diameter impact crater on Mars' southern hemisphere.
这张照片展示了位于火星南半球一个直径11公里冲击陨坑的一部分。
For scale, the large impact crater in lower right corner is about 18.5 miles, or 30 km, wide.
右下角的巨大陨石坑按比例宽约18.5英里，或30公里。
This image shows the west-facing side of an impact crater in the mid-latitudes of Mars' northern hemisphere.
这幅图片显示了火星北半球中纬度地区的一个面向西侧的陨石坑。
They conducted surveys at numerous sites in Mexico, including a spot called El Peñón, near the impact crater.
他们在墨西哥的很多地区，包括一个在陨石坑附近的叫做El Peñón的地区进行了调查。
In the centre of the image, the floor of an impact crater almost 50 km wide is covered in dark material.
在图像的中心，一个陨石坑地面将近50公里宽覆盖着黑色的物质。
Named after the famous Portuguese navigator and explorer Ferdinand Magellan, the impact crater is about 100 km across.
麦哲伦陨石坑以葡萄牙著名航海家麦哲伦的名字命名，直径约100公里。
However, Italian scientists from the University of Padova believe that the Wembo-Nyama feature is an impact crater.
但来自意大利帕多瓦大学的科学家认为，文博尼亚马之地是陨石撞击形成的。
Mimas, one of the smaller round moons of Saturn, sports Herschel crater, one of the larger impact craters in the entire Solar System.
土卫一，土星的一颗较小的卫星，却炫耀着全太阳系最大的撞击坑之一的赫歇尔环形山。
Scientists have to sample the rock in the Wembo-Nyama feature to confirm whether or not it is an impact crater and when it formed.
科学家要从文博尼亚马之地提取岩石样本，以便确认这是不是一个陨石，以及它是什么时候形成的。
What appeared on his screen was something typically seen only on our own moon and other planets — a meteorite impact crater 148 feet across.
他的屏幕上出现的是一些我们通常在月球和其它行星上看见的东西- - -一个148英尺宽的陨石坑。
Although it resembles an impact crater, it formed when a volcanic dome hardened and gradually eroded, exposing the onion-like layers of rock.
尽管它看起来像是一个陨石撞击坑，它是在一个火山穹丘硬化和逐步侵蚀中，剥离出洋葱状岩石层的结果。
Therefore, the Duolun basin is not an impact crater, instead its formation was related to the volcanic eruption during the late Jurassi…
因此，多伦盆地不是撞击形成，而与晚侏罗系上统火山喷发有关。
Types of lakes: tectonic lake, crater lake, fluvial lake, dammed lake, glacier lake, karst lake, Aeolian lake, impact crater lake and artificial lake.
湖泊分类：构造湖、火山口湖、冲积残留湖、堰塞湖、冰川湖、喀斯特湖、风成湖、陨石撞击湖和人工湖。
This observation from NASA's Mars Reconnaissance Orbiter shows the floor of a large impact crater in the southern highlands, north of the giant Hellas impact basin.
这幅来自NASA火星轨道观察器的图像显示了位于火星南方高地巨大的Hellas撞击盆地北侧地表上的一个大撞击坑。
Mimas, at the upper right, has an enormous impact crater on one side, and Tethys, at the bottom, has a huge rift zone called Ithaca Chasma that runs nearly three-quarters of the way around the moon.
右上角的是土卫一，在它上面的一边上，有着一个巨大陨石坑；底部的是土卫三，上面有一个巨大的、称为伊萨卡峡谷的裂谷带，它几乎占了该卫星绕行路线的四分之三。
This impact released an enormous amount of energy, excavating a crater about twice as large as the lunar crater Tycho.
这次撞击释放了大量的能量，挖出了一个大约有月球上的第谷陨石坑两倍大的陨石坑。
An asteroid of this size would be expected to leave an immense crater, even if the asteroid itself was disintegrated by the impact.
这样大小的小行星即使受到冲击碎裂之后也会留下一个巨大的陨石坑。
But the team concluded that those anomalies were created by jumbling of strata when debris flowed back into the crater after the impact.
但是小组总结认为这些异常是当碎片在撞击后回流到陨石坑时的地层混杂造成的。
Thought to have been caused by asteroid impact that created Chicxulub crater in the Yucatan.
据认为其原因是在尤卡坦半岛造成希克苏鲁伯陨石坑的小行星影响。
The crater was the right size and - crucially - the right age to be the site of the cataclysmic impact.
这个坑洞尺寸与所要寻求的相同，最关键的是，它的年代也和毁灭性撞击的年代相符合。
If that turns out to be from an asteroid impact, it would be the largest crater found on Earth. Ever.
如果这是由行星撞击所形成，毫无疑问，它将是地球上最大的陨石坑。
The central crater could be formed by unusual layers below the surface, or from a lucky second impact.
陨坑中心可能是由于不同寻常的下层地质结构导致的，也有可能因为幸运的二次撞击而形成的。
Duxbury thinks these grooves were created when an asteroid impact threw up large boulders that rolled from the crater.
克斯·伯里认为，小行星撞击福波斯地表后，产生的巨大岩石滚过陨石坑，就形成了这些凹痕。
The impact that made this crater likely almost destroyed Mimas.
陨石坑所产生的影响，几乎可以摧毁整个的土卫一。
The impact that made this crater likely almost destroyed Mimas.
陨石坑所产生的影响，几乎可以摧毁整个的土卫一。
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