A Californian stage (48–35 Ma ago) in the Eocene, underlain by the Ulatisian, overlain by the Refugian, and roughly contemporaneous with the upper Lutetian and Bartonian stages.
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。