flowstone

常见例句

• We have carried out ~230Th/~234U dating on intercalated calcite samples. The results show that the capping flowstone layer is of an age of 130 ka, and the second one 218 ka.
  本文的两个碳酸盐岩样品的~(230)Th/~(234)U年代表明,该地点表层钙板在约130ka开始形成,第二钙板层形成的年代为距今218ka。
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