Cretaceous-Tertiary boundary是什么意思_Cretaceous-Tertiary boundary的用法_词性_词根

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词典释义：

Cretaceous-Tertiary boundary

时间: 2023-06-12 03:29:03

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白垩纪－第三纪边界

双语例句

This change in plankton found in marine deposits is what marks the boundary between the Cretaceous and the Tertiary.

海洋沉积物中浮游生物的这种变化标志着白垩纪和第三纪的分界线。

释义

(亦作K/T boundary)Geology the division between the Cretaceous and Tertiary periods, about 65 million years ago

【地质】　白垩纪－第三纪边界（约６５００万年前）。

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