| 单词 | 沉积层 |
| 释义 | 〔Miocene〕Of, belonging to, or characteristic of the geologic time, rock series, and sedimentary deposits of the fourth epoch of the Tertiary Period, characterized by the development of grasses and grazing mammals. See table at geologic time 中新世的：与以草本植物和食草哺乳动物的发展为特征的第三纪第四世的地质时代、岩系和沉积层有关的，属于这一世的 参见 geologic time〔alluvium〕Sediment deposited by flowing water, as in a riverbed, flood plain, or delta. Also called alluvion 冲积层：河床、洪水淹没的平原或三角洲中的流水淤积所产生的沉积层 也作 alluvion |
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