A name given locally to various stiff clays; esp. an indurated clay of the coal-measures.
| 单词 | θ5950 |
| 释义 | the world > the earth > structure of the earth > constituent materials > clay > [noun] > in coal measures (6) clunch1686 A name given locally to various stiff clays; esp. an indurated clay of the coal-measures. soap-scale1704 a kind of clay (see quot.). sill1774 A kind of clay found in coal-measures. Also attributive, as sill-coal, sill-pencil. poundstone1799 Coal Mining. Rock or clay found as a bed underlying a coal seam. Obsolete. clunch-clay1815 = 4; also the Oxford clay. blond-metal1831 a variety of clay ironstone of the coal measures. |
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