A series (127–99.6 Ma ago) in the N. American Lower Cretaceous, underlain by the Coahulian, followed by the Cenomanian, and containing the Aptian and Albian.
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。