要想知道盆地的年龄，唯一的方法就是直接研究它的岩石吗？
The only way to know the basin's age is to study its rocks directly?
它陡峭的岩石边从一个宽阔的基地上拔地而起，直到在平坦的山顶下突然被切断。
Its sheer rock sides sweep up from a broad base until they cut off abruptly at the flat summit.
他们开采岩石，人工把它分解，然后把磷放进农业肥料里。
They mined the rock, artificially break it down and put the Phosphorus into agricultural fertilizers.
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