A sediment which is typically black, rich in organic matter, and deposited in productive lakes.
| 单词 | θ5924 |
| 释义 | the world > the earth > structure of the earth > constituent materials > sediment or alluvium > [noun] > lake sediment (1) gyttja1887 A sediment which is typically black, rich in organic matter, and deposited in productive lakes. |
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