单词 | ballstone |
释义 | > as lemmasballstone ballstone n. Geology and Mining (in the English west midlands) a rounded lump of ironstone or limestone; rock consisting of such lumps. ΘΚΠ the world > the earth > structure of the earth > constituent materials > stone > a stone > [noun] > other stones loys1295 anthracites1535 rockstone?1545 stone-glass1585 milkstone1598 fieldstone1649 pebble1669 ballstone1726 grain-stone1756 knablick1757 found stone1800 sitfast1809 graptolite1838 bumble1839 hardhead1849 chock1894 chockstone1894 1726 J. Laurence New Syst. Agric. i. 177 The Iron-stone and Coal..lie here together [sc. at Mear Heath, Staffordshire]; the Stone above the Coal,..having the Bass above and below it; in which they meet an Iron Oar call'd Ball Stones distinct from the Vein. 1799 R. Townson Tracts & Observ. Nat. Hist. & Physiol. 168 (table) Ball Stone [is a] grey coloured ironstone in nodules, in dry clay. These nodules contain fern leaves and other vegetable impressions. 1840 Trans. Geol. Soc. 5 412 The masses which constitute the strata frequently form large, irregularly-rounded blocks, highly crystalline and pure. They are termed ‘ballstones’, and form an excellent flux for the ironstone. 1914 Proc. Geologists' Assoc. 25 193 In an evenly-bedded limestone an irregular ball-shaped or lenticular mass of unstratified limestone is found to occur, which a closer inspection reveals to be crowded with fossils. This development of the limestone has received from the Shropshire quarrymen the name of ballstone. 1993 J. Alfrey & C. Clark Landscape of Industry iii. 34 The uppermost band of Wenlock Limestone is good-quality stone, and contains many of the prized ‘ballstones’ or ‘crog balls’—residual lumps of pure coral which create a very high-quality stone. < as lemmas |
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