maastrichtian中文什么意思
马斯垂克阶
马斯特里赫特统
麦斯里希特阶
麦斯特里希特阶
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百科释义
The Maastrichtian is, in the ICS' geologic timescale, the latest age or upper stage of the Late Cretaceous epoch or Upper Cretaceous series, the Cretaceous period or system, and of the Mesozoic era or erathem. It spanned from 70.
详细百科解释
