A mammalian age whose base is dated at approximately 3 Ma ago. It lasted an estimated 2 Ma and therefore transgresses the Late Pliocene/Early Pleistocene boundary.
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。