| 单词 | black shale |
| 释义 | > as lemmasblack shale black shale n. a dark-coloured, finely laminated carbonaceous shale rich in organic compounds. ΘΚΠ the world > the earth > structure of the earth > constituent materials > rock > sedimentary rock > [noun] > shale > others till1672 bass1686 bat1686 blue metal1699 scallop slate1711 black shale1730 shale-shiver1794 shale1825 till-stonec1830 Wenlock shale1834 famp1836 Boghead1858 oil shale1866 paper shale1874 symon1881 paste-rock1882 slasto1953 1730 Philos. Trans. 1729–30 (Royal Soc.) 36 30 The Bodies through which they dig to come at the Vein are generally Limestone and Black Shale. 1811 J. Farey Gen. View Agric. Derbyshire I. 399 The Black-shale flake..produces a bed of Ironstone, that has a good deal of Spar in veins or Septa in it. 1896 Trans. Federated Inst. Mining Engineers 10 483 It became evident that no coal-seam above the blackshale could be profitably worked on a large scale. 1951 Trans. Inst. Brit. Geographers No. 17. 146 In Derbyshire, centering on the Clay Cross-Chesterfield area, several seams are again of coking quality; the best is the Blackshale (= Silkstone). 2002 Sci. Amer. (U.K. ed.) Aug. 43/1 Some of this carbon becomes incorporated into sedimentary rocks such as black shales, the largest reservoir of organic matter on earth. < as lemmas |
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