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coral rag
A well-cemented, rubbly limestone composed largely of broken and rolled fragments of coral-reef deposits; e.g., the Coral Rag of the Jurassic, used locally in Great Britain as a building stone.
- 词性: noun
- 行业/领域: 采矿
- 类别 一般矿业; Mineral mining
- Government Agency: USBM
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创建者
- ed.young
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(Milwaukee, United States)