| 单词 | geologic age |
| 释义 | geologic age [¦jē·ǝ¦läj·ik `āj] GEOLOGY 1. Any great time period in the earth's history marked by special phases of physical conditions or organic development. 2. A formal geologic unit of time that corresponds to a stage. 3. An informal geologic time unit that corresponds to any stratigraphic unit. |
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