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聽力原文及翻譯
Once you do that, you can compare the age of the zircon in the sandstone in your sample to the age of the zircon in the mountains. If the age of the zircon matches the age of one of your mountain ranges, then it means the sandstone actually used to be part of that particular mountain range. Is everybody with me on that? Good.
完成此操作后,您可以將樣本中砂巖中的鋯石年齡與山脈中的鋯石年齡進(jìn)行比較。如果鋯石的年齡與某座山脈的年齡相匹配,則意味著砂巖實際上曾經(jīng)是該特定山脈的一部分。大家同意我的觀點(diǎn)嗎?很好。
So, in this case, uranium-lead dating was used to establish that half of the sandstone in the samples was formed at the same time the Rocky Mountains and the Appalachian Mountains were formed. So, because of this new way of doing uranium-lead dating, we've been able to determine that one of our major assumptions about the Grand Canyon was wrong.
因此,在這種情況下,鈾鉛測年法用于確定樣本中一半的砂巖是在落基山脈和阿巴拉契亞山脈形成的同時形成的。因此,由于這種新的鈾鉛測年方法,我們能夠確定我們對大峽谷的主要假設(shè)之一是錯誤的。
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