A stage (2.9–2.2 Ma ago) in the Pliocene of California, underlain by the Delmontian, overlain by the Venturian, and roughly contemporaneous with part of the Piacenzian stage.
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。