| 单词 | getting rock |
| 释义 | > as lemmasgetting rock ΚΠ 1817 W. Pitt Topogr. Hist. Staffs. 177 Getting rock, containing iron-stone. 1858 Mem. Geol. Surv. Great Brit.: Iron Ores ii. 112 Below the Fireclay coal [in the South Staffordshire coal field] there is generally from 2 to 10 feet of fireclay, after which a sandstone is frequently met with, sometimes containing balls of ironstone sufficient to be worth getting. It is then called ‘the Getting Rock’. 1883 W. S. Gresley Gloss. Terms Coal Mining Getting-rock, clay ironstone in the roof of a coal-seam, which is worked in conjunction with the coal. < as lemmas |
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