A time during which glaciers reached their maximum extent, ocean waters were well mixed and oxygenated, and sea levels were low. In cyclostratigraphy, fourth- and fifth-order cycles were predominant. Compare greenhouse period.
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。