zhè / kuài / yán shí / de / céng lǐ / fēi cháng / qīng xī / jì lù / le / yì wàn / nián / de / dì zhì / lì shǐ

这块岩石的层理非常清晰，记录了亿万年的地质历史。

The stratification of this rock is very clear, recording billions of years of geological history.