| 单词 | rattle stone |
| 释义 | rattle stone [`rad·ǝl ´stōn] GEOLOGY A concretion composed of concentric laminae of different compositions, in which the more soluble layers have been removed by solution, leaving the central part detached from the outer part, such as a concretion of iron oxide filled with loose sand that rattles on shaking. Also known as klapperstein. |
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