| 单词 | coal band |
| 释义 | > as lemmascoal band coal band n. †(a) Scottish a stratum of stone overlying a stratum of coal (obsolete rare); (b) Geology a stratum of coal. ΚΠ 1795 W. MacRitchie in Sc. Antiquary (1896) 10 110 The pits here [sc. Keltybridge] of no considerable depth, and the coal very accessible. It is covered with a stratum of freestone (here called a coal-band) of a considerable thickness. 1829 T. C. Haliburton Hist. & Statist. Acct. Nova-Scotia II. ix. 425 A number of pit shafts have been sunk from the surface, through the great coal band. 1903 Proc. Yorks. Geol. & Polytechnic Soc. 15 88 There is at the outset one good horizon that is clearly definable: that is the coal band at the top of..the Third Grit series. 2003 T. Palmer Perilous Planet Earth xxi. 218 The Alvarez group, investigating rocks collected in the region of Hell Creek, Montana..found elevated iridium levels in a thin coal band. < as lemmas |
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