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单词 coal bed
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coal bed
coal bed n. a stratum or layer of coal.
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the world > the earth > minerals > mineral deposits > [noun] > stratum or bed > of coal
coal bed1591
roach1653
coal measure1665
coal vein1665
main coal1708
coal seam1756
1591 in Trans. Halifax Antiq. Soc. (1930–2) 31 74 One myne of coales within the greaveship of Hipperholme, with all rights, and the several colebeddes to the same mine apertaining, lying and being in a place called Godley Lane.
1664 H. Power Exper. Philos. iii. 172 Walls or Pillars of the whole Cole-Bed remaining (which with us is not above two foot thick) to hinder the roof of the pit for falling.
1777 R. E. Raspe tr. I. von Born Trav. Bannat of Temeswar x. 83 The exterior appearance of the ground countenances the conclusion, that coal beds are below the gold impregnated stratum.
1861 H. Macmillan Footnotes from Nature 5 A coal-bed is, in fact, a hortus-siccus of extinct cryptogamic vegetation.
1920 M. D. Post Sleuth of St. James's Square v. 100 In the great range of mountains..beautifully named the Alleghanies, there is a vast measure of coal beds.
2002 R. Pruitt Rivers of Stone viii. 98 This area has been thoroughly prospected for uranium, even for coal beds.
extracted from coaln.
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