The unit of strata lying between the top boundary of a distinctive lower biostratigraphic unit and the base of an equally distinctive, but different, upper biostratigraphic unit. An interval-zone may or may not contain fossils.
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。