全球都能发现这一撞击的喷发物。

The ejecta from the impact are found all over the world.

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在年代久远的喷发物地层中有迹象表明此处的岩石产生于一次撞击。

These are also the telltales in distant layers of ejecta that the rock in question has come from an impact.

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但是，这种岩石还是相当广泛，因为它既是海床基本物质，也是常见的陆地火山喷发物。

But the rock is reasonably widespread, being both the underlying stuff of ocean floors and a common outpouring of terrestrial volcanoes.

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