今天我想讨论我们确定一块土地的年龄或者其他地质学特征的方法-年代测定技术。
Today I want to talk about way at which we are able to determine how old a piece of land or some other geologist feature is-dating techniques.
根据地质体的形成温度和被测定矿物封闭温度之间的关系，讨论了各个年龄的地质含义。
According to the relationship between the formation temperatures of geological bodies and the sealing temperature of ar in minerals, the geological implications of various ages are discussed.
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