请输入您要查询的字词:

 

单词 Oligocene
释义
Oligocene

Biology
  • The third geological epoch of the Palaeogene period. It began about 34 million years ago, following the Eocene epoch, and extended for about 11 million years to the beginning of the Miocene epoch. The epoch was characterized by the continued rise of mammals; the first pigs, rhinoceroses, and tapirs made their appearance.


Geology and Earth Sciences
  • An epoch (33.9–23.03 Ma ago) of the Palaeogene period. It follows the Eocene and precedes the Miocene epochs. The Oligocene epoch comprises the Rupelian and Chattian ages.

    http://www.geologypage.com/2014/04/oligocene-epoch.html Oligocene Epoch.


随便看

 

科学参考收录了60776条科技类词条,基本涵盖了常见科技类参考文献及英语词汇的翻译,是科学学习和研究的有利工具。

 

Copyright © 2000-2023 Sciref.net All Rights Reserved
京ICP备2021023879号 更新时间:2024/12/25 1:39:43