如今这些石头已经消失，但坑洞所形成的轨迹仍然存在。

The stones have disappeared, but the path of holes remains.

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叠层石是世界上已知的最古老化石。组成这些石头的这种微小的藻类或细菌也被认为是最古老的生命形式，在超过三十亿年后的今天仍然存在。

The tiny algae or bacteria that build them are also thought to be the most ancient life form that is still around today, after more than three billion years.

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