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oligocene

/ˈɒl.ɪ.ɡə.siːn/

翻译: 地质年代名称,指约3400万年前至2300万年前的一段时期,属于古近纪的最后一个世,以哺乳动物和鸟类的发展以及剑齿虎等动物的出现为特征。

1 个条目

noun

/ˈɒl.ɪ.ɡə.siːn/C2formalscientific
  • zh地质年代名称,指约3400万年前至2300万年前的一段时期,属于古近纪的最后一个世,以哺乳动物和鸟类的发展以及剑齿虎等动物的出现为特征。

A proper noun referring to a geological epoch that lasted from approximately 40 million to 25 million years ago, known for the appearance of sabertoothed cats.

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  1. C2formalscientific

    A geological epoch that lasted from approximately 34 million to 23 million years ago, characterized by the appearance of early sabertoothed cats and the spread of grasslands.

    zh渐新世

    • The Oligocene epoch saw the rise of many modern mammal groups.
    • Fossils from the Oligocene include early species of elephants and horses.
    • During the Oligocene, the climate became cooler and drier, leading to the expansion of grasslands.
词形
  • oligocenes plural form
  • oligocenes' possessive plural form
  • oligocene's possessive singular form