An episode of rifting (see rift) that occurred about 1400–1000 Ma ago, after the Ketilidian orogeny but probably not causally connected to it.
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。