A phase of mountain building, affecting what is now a N–S belt in Russia, that occurred at the same time as the Hercynian orogeny, in the late Devonian and early Carboniferous.
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。