英语词汇“白堊系”的翻译、意思、用法、释义-英汉汉英双解词典

词汇	白堊系
释义	白堊系 bái è xì中生代地層構造之一。指出現於侏儸系之後、第三系之前的岩石，距今約有六千餘萬年至一億三千餘萬年。當時歐洲地區普遍沉積顯著的白色石灰岩，因而得名。
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