A stage in the European Early Cretaceous dated at 136.4–130 Ma ago (Int. Commission on Stratigraphy, 2004), preceded by the Valanginian and followed by the Barremian. See also neocomian.
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。