And it was this tattered complexity in the rock record that obscured its meaning until relatively recently.

而且，岩石记录的复杂又使之丧失了原本的意义。

He added that the rock record offers the most detailed look yet into the period immediately after the asteroid impact.

他补充说，岩石记录提供了小行星袭击之后那段时间的" 最详细信息" 。

A clue to this puzzle again comes from the ancient rock record.

这个谜题的线索再次来自古老的岩石记录。

We often looked to the rock record and the different types of rocks that are preserved around the volcano to understand past behavior.

我们经常查看岩石记录和火山周围保存的不同类型的岩石，以了解过去发生的事。

Only the rock record can tell us what happened to them, but most ancient rocks have been scattered, buried, or destroyed over time.

只有化石记录能告诉我们它们发生的事，但大部分古代化石随着时间的流逝被分散，掩埋，或被损毁。

And the local rock record shows that this formation was just full of predatory dinosaurs.

当地的岩石记录显示，这个地层充满了掠食性恐龙。

Those elements will last in the rock record, even in our bones and teeth for millions of years.

这些元素将在岩石记录中持续存在，甚至在我们的骨骼和牙齿中存在数百万年。

Changes in climate or fossils found in the rock record help distinguish these epochs and help geologists tell deep time.

气候变化或岩石记录中发现的化石有助于区分这些时代，并帮助地质学家辨别深层时间。

And this is for good reason: deep-sea vents are well-known in the ancient rock record, and it's thought that the early Earth had a global ocean and very little land surface.

这是有充分理由的：深海喷口在古代岩石记录中是众所周知的，人们认为早期地球有一个全球性的海洋和很少的陆地表面。

" Now we have the technology to extend this methodology to another terrestrial planet, Mars, which hosts an ancient sedimentary rock record which extends even further back in time than our own, " McMahon said in a statement.

" 现在我们拥有了将这种方法推广到另一个类地行星—火星的技术，火星上保存着一份古老的沉积岩记录，其时间甚至比我们地球的记录还要久远。"