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单词 clay ironstone
释义

Clay ironstone


an ore of iron consisting of the oxide or carbonate of iron mixed with clay or sand.
See under Clay.

See also: Clay, Ironstone

clay ironstone


clay ironstone

[′klā ′ī·ərn‚stōn] (petrology) A clayey rock containing large quantities of iron oxide, usually limonite. A clayey-looking stone occurring among carboniferous and other rocks; contains 20-30% iron.
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