A substage of the Mesoproterozoic, from about 1375 to 1100 Ma ago (Int. Commission on Stratigraphy, 2004), of western Russian origin, preceded by the Burzyan and followed by the Karatau.
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。