The basal stage (61.7–52 Ma ago) in the Palaeogene of south-eastern Australia, preceded by the Danian and overlain by the Johannian.
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。