在分析这些岩芯时，他们发现冲击石英颗粒———带有特殊排列的微裂缝的薄片，科学家认为他们是外层空间来的物体与地球碰撞留下来的遗迹。
When they analyzed these rocks, they foundshockedquartz grains—slivers with a particular arrangement of micro cracks believed to represent the relic left by an extraterrestrial impact.
冰中自然形成的裂缝和隧道可能会允许一些河水流过去，而目前河下游的一座桥已经被河水冲击所侵蚀。
Cracks and ice tunnels may be allowing some water to flow through; a bridge across the river downstream has been washed out from one water surge so far.
由地震产生的海啸冲击冰原，导致断层和裂缝。
The tsunamis created by such quakes tug on icesheets, inciting ruptures and fractures.
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