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ballers
White sand with large spheroidal masses of calciferous sandstone called sand ballers or giants' marbles, some being 3 to 6 ft (approx. 1 to 2 m) in diameter. (Possibly a variant of "bollars," a dialect form of boulders.)
- 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)