A sediment formed in the open sea by the slow settling of calcareous and siliceous biogenic particles, biogenic material comprising more than 75% of the volume. Compare hemipelagic sediment.
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。