岩層採樣就好似冰層採樣咁 唔同嘅係 ， 冰層採樣 在於搵出氣候變化 而岩層採樣只係 搵唔同時代人類嘅活動
Rock sampling is like ice sampling, but the difference is that ice sampling is about finding climate change, while rock sampling is just about finding human activity in different eras