green·sand 
(grēnsănd′)
(grēnsănd′)n.
A sand or sediment having a dark greenish color caused by the presence of glauconite.
| 单词 | greensand |
| 释义 | green·sand (grēnsănd′)n. A sand or sediment having a dark greenish color caused by the presence of glauconite. |
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