A named group into which geological structures are placed if their affinity is uncertain but their origin is considered to be organic. They are removed from the ‘Problematica’ when more certain evidence of their relationships is discovered.
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。