| 单词 | geochemical evolution |
| 释义 | geochemical evolution [¦jē·ō¦kem·ǝ·kǝl ´ev·ǝ`lü·shǝn] GEOCHEMISTRY 1. A change in any constituent of a rock beyond that amount present in the parent rock. 2. A change in chemical composition of a major segment of the earth during geologic time, as the oceans. |
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